A water-free afforestation method for pinus sylvestris

Abstract

The application belongs to the technical field of sand land afforestation, and particularly relates to a water-free afforestation method for pinus sylvestris var. mongolica, which comprises the following steps: sand barrier laying, soil replacement planting, film covering, cage sleeving and later management. The sand barrier laying is performed by setting a grid sand barrier at a sand land; the soil replacement planting is performed by digging a planting hole in the gap between the sand barriers, filling the bottom of the planting hole with mixed soil, transplanting pinus sylvestris var. mongolica seedlings after watering, backfilling the planting hole with the mixed soil and pouring water; wherein the mixed soil is obtained by mixing dry sand, soil and eucommia rubber compound at a mass ratio of 1-3:1:0.55-0.8; the eucommia rubber compound is obtained by mixing corn silk crushed material and softened eucommia rubber and then performing hydrothermal reaction; the film covering is performed by selecting a colorless and transparent film to cover around the roots and stems of the seedlings, covering soil and sealing the disc around the film; the cage sleeving is performed by sleeving a protective cage on each seedling. The afforestation method provided by the application can achieve long-term water retention effect, and only relies on natural rainfall to meet the water supply for plant growth, thereby avoiding consumption of a large amount of manpower and material resources.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of sand land afforestation, and particularly relates to a Pinus sylvestris var. mongolica free-water afforestation method. BACKGROUND

[0002] Pinus sylvestris var. mongolica Litv., also known as Hailaer pine, Mongolian red pine and the like, is a coniferous evergreen tree of Pinaceae in Gymnospermae. Pinus sylvestris var. mongolica Litv. is mainly distributed in the Daxing'anling forest region (west to Moroduo, Jinhe and Genhe, east to Xilin and Humaline north, and south to Yitulihe, Mianduhe, Arxan and Honghuergai, which are distributed in a strip or block shape). Pinus sylvestris var. mongolica Litv. is also distributed in the sand dune area west and south of Hailaer and Mongolia. Pinus sylvestris var. mongolica Litv. is a good tree species for fast-growing timber, protection greening and soil and water conservation in the northeast region. Pinus sylvestris var. mongolica Litv. has strong timber quality, straight grain, and can be used for building and furniture; the trunk can be cut for resin, and pine oil and turpentine can be extracted from the resin; and the bark can be used for extracting rosin.

[0003] In addition, Pinus sylvestris var. mongolica Litv. is a strong light-loving and deep-rooting tree species, can adapt to ridge and sunny hillside with less soil moisture, and arid sand land and gravelly sandy soil area, and has strong cold resistance and can withstand-40 to-50℃ low temperature, is xerophytic, and does not require soil moisture. Pinus sylvestris var. mongolica Litv. has strong adaptability, and can grow well on the wind-sand soil with poor nutrients and the mountain gravel soil with very thin soil layer, and thus can be used as a good tree species for wind and sand fixation. Pinus sylvestris var. mongolica Litv. can grow normally by taking appropriate artificial irrigation in the arid desert region, and has very strong adaptability in the arid desert region, and thus becomes one of the preferred tree species for establishing farmland shelter forest in the arid desert region. However, the rainfall in the arid desert region is small, and if the normal growth of Pinus sylvestris var. mongolica Litv. is ensured, water needs to be intermittently supplemented in the management and maintenance process, especially in the initial period of Pinus sylvestris var. mongolica Litv. seedling transplanting, and artificial irrigation needs to be performed when drought occurs, which is undoubtedly a huge project for the desert region. Therefore, how to realize free-water planting of Pinus sylvestris var. mongolica Litv. is a problem to be solved. SUMMARY

[0004] In view of the deficiencies of the prior art, the application provides a Pinus sylvestris var. mongolica free-water afforestation method, which can long-term save water around the root system soil and provide a favorable environment for the growth of Pinus sylvestris var. mongolica seedlings.

[0005] The specific technical scheme provided by the application is as follows:

[0006] The application provides a Pinus sylvestris var. mongolica free-water afforestation method, which comprises the following steps:

[0007] Laying sand barriers: setting grid sand barriers at the sand land;

[0008] The soil is replaced by planting: digging planting hole in the gap of sand barrier, filling mixed soil at the bottom of planting hole, transplanting pine seedling after watering, and backfilling planting hole with the mixed soil, and pouring water thoroughly; wherein, the mixed soil is mixed by dry sand, soil and eucommia rubber compound according to the mass ratio of 1-3:1:0.55-0.8; the eucommia rubber compound is obtained by mixing corn silk crushed material and softened eucommia rubber and then carrying out hydrothermal reaction; the planting spacing is 3-4 m;

[0009] Covering film: selecting colorless and transparent film to cover around the root and stem of seedling, and covering soil and sealing disc around the film;

[0010] Cage: each seedling is sleeved with protective cage;

[0011] Later management.

[0012] Preferably, the mixed soil is mixed by dry sand, soil and eucommia rubber compound according to the mass ratio of 3:1:0.55.

[0013] Preferably, the hydrothermal reaction is carried out at 180-240 DEG C for 1-2 h.

[0014] Preferably, the eucommia rubber is prepared according to the following steps:

[0015] Taking any part of eucommia tree, such as leaf, branch, bark or rhizome or mixture of several kinds, adding 5-15% alkali liquor, extracting at 45-90 DEG C for 2-3 times, 2-3 h each time, and combining the obtained extraction liquor each time;

[0016] Adding 3-5% acetic acid solution to the extraction liquor, continuing to extract overnight at 35-45 DEG C, filtering, collecting the precipitate, evaporating the solvent, and drying to obtain eucommia rubber.

[0017] Preferably, the soil is selected from soil under pine forest or seedling cultivation soil of pine seedling for more than three years.

[0018] Preferably, the dry sand is selected from sandy soil of sand planting land.

[0019] Preferably, the filling depth of mixed soil at the bottom of planting hole is 40-60 cm.

[0020] Preferably, the sand barrier is selected from sand barrier with the size of 2-2.5 m x 2-2.5 m in the form of net, which is made of sand willow, wheat straw or straw.

[0021] Preferably, the pine seedling is three-year-old seedling in nutrient pot, and the seedling is transplanted after the seedling nursery land is flooded, the seedling is taken out, and the seedling in nutrient pot is watered again.

[0022] Preferably, the size of the film is 75-100 cm x 75-100 cm.

[0023] Preferably, the new plant seedlings are taken overwintering protection measures in the management process. The overwintering protection measures can adopt the method of piling up the overwintering protection wall, specifically: before the soil freezes, the soil on the windward side of the seedling is piled up to a height and width that exceeds the seedling itself, so that the seedling is protected from the cold wind, thereby physiological drought occurs. Or use plastic film to cover the seedling for overwintering protection. Or use the management means of overwintering by covering soil, specifically: before the soil freezes in autumn, the seedling bed is irrigated once, the seedlings are pressed down in the same direction, and the seedlings are completely buried by covering soil, and the overwintering soil is removed in the next year when the soil thaws. The seedlings are irrigated in time after the soil is removed.

[0024] Compared with the prior art, the present application has the following beneficial effects:

[0025] The corn silk crushed material and the softened eucommia rubber are mixed for hydrothermal reaction in the present application, the reaction product is mixed with dry sand and soil and buried around the root system of the pinus sylvestris var. mongolica seedling, which can play a long-term water retention role, and only natural rainfall can meet the water supply for plant growth, which greatly avoids the consumption of a large amount of manpower and material resources.

[0026] The sand soil of the planted sand land can maintain the original ecological balance of the planting land in the present application, avoid the interference of microbial flora in different planting media, enable the transplanted pinus sylvestris var. mongolica seedlings to quickly adapt to the growth environment and restore the growth function, thereby improving the survival rate. In addition, the soil under the pinus sylvestris var. mongolica forest or the pinus sylvestris var. mongolica seedling cultivation soil used for more than three years has formed a balanced microecological group required for the growth of pinus sylvestris var. mongolica, which can further enable the transplanted pinus sylvestris var. mongolica to quickly adapt to the root system environment and grow stably.

[0027] The raw materials corn silk crushed material and eucommia rubber used in the present application are both from natural plants, and have good environmental protection and biocompatibility, and will not pollute and harm the environment. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is a scanning electron microscope image of the sponge-like structure of the eucommia rubber compound prepared in Example 1. DETAILED DESCRIPTION

[0029] The technical solutions in the embodiments of the present application will be clearly and completely described below. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0030] The eucommia ulmoides gum used in the application is extracted from the roots, fruits, leaves or barks of eucommia ulmoides Oliv. of eucommia ulmoides Oliv. and the main component is trans-1,4-polyisoprene.

[0031] The corn silk contains flavones and glycosides, sterols, alkaloids, sugars, organic acids, volatile oils, trace elements and various vitamins.

[0032] The application provides a water-free afforestation method for pinus sylvestris.

[0033] Laying sand barriers: laying grid sand barriers at sandy land;

[0034] Changing soil for planting: digging planting holes in the gaps between the sand barriers, filling the bottom of the planting holes with mixed soil, transplanting the pinus sylvestris seedlings after watering, backfilling the planting holes with mixed soil, and pouring water; wherein the mixed soil is obtained by mixing dry sand, soil and eucommia ulmoides gum compound at a mass ratio of 1-3:1:0.55-0.8; the eucommia ulmoides gum compound is obtained by mixing corn silk crushed material and softened eucommia ulmoides gum and then performing hydrothermal reaction; the planting distance is 3-4 m;

[0035] Laying film: selecting colorless and transparent film to cover around the roots and stems of the seedlings, and covering soil and sealing the disc around the film;

[0036] Cage: each seedling is sleeved with a protective cage;

[0037] Later management.

[0038] The eucommia ulmoides gum is softened by heating the solid eucommia ulmoides gum to 100 DEG C.

[0039] The corn silk crushed material is dried corn silk crushed to 80-120 meshes.

[0040] The dry sand is the sandy soil of the planting land. Preferably, the fine sand of the planting land passing through an 80-120 mesh sieve can be selected. The soil of the planting land can maintain the original ecological balance of the planting land, avoid the interference of microbial flora in different planting media, make the pinus sylvestris seedlings quickly adapt to the growth environment, and restore the growth function.

[0041] The soil is selected to be the soil under the pinus sylvestris forest or the pinus sylvestris seedling cultivation soil for more than three years. Preferably, the soil under the pinus sylvestris forest in the northeast Greater Khingan Mountains region for more than three years can be selected. The soil under the pinus sylvestris forest for more than three years or the pinus sylvestris seedling cultivation soil has formed a balanced micro-ecological group required for the growth of pinus sylvestris, which is beneficial to the rapid adaptation of pinus sylvestris to the environment around the roots and stable growth.

[0042] During the research, it is accidentally found that the corn silk and the eucommia rubber are mixed to carry out the hydrothermal reaction, the reaction product is mixed with the dry sand and the soil, and the mixed soil has the better water retaining effect. The sand soil can maintain the basic water content in the long-term drought condition. The scotch pine planted in the sand soil can meet the water requirement for the growth by using the natural rainfall, the normal growth of the scotch pine is ensured, the survival rate of the scotch pine is improved, and the time cost and the cost of the artificial management of the scotch pine during the planting period, especially during the initial planting period, are reduced. The good water retaining effect of the mixed soil is due to the fact that the double bond of the eucommia rubber is destroyed in the hydrothermal reaction process and the components in the corn silk are used to form the product with the sponge structure. The product with the sponge structure can fully absorb the water during the rainfall, and then the water stored in the product with the sponge structure is gradually released to the soil through the capillary phenomenon when the water content in the soil is reduced. The water content in the soil is kept at a high level for a long time, so that the water required for the growth of the scotch pine is met for a long time. The scanning electron microscope diagram of the product with the sponge structure is shown in Figure 1 It should be noted that the structure of the eucommia rubber compound with the sponge structure is described by taking the example of the embodiment 1 because the eucommia rubber compound with the sponge structure is prepared in each embodiment of the present application.

[0043] Embodiment 1

[0044] A scotch pine watering-free afforestation method, comprising the following steps:

[0045] Laying sand barriers: leveling the sand barrier section, removing stone chips and other sundries, and selecting sand willows to form a 2m*2m net format sand barrier;

[0046] Changing soil and planting: digging a planting hole in the gap of the sand barrier, filling the bottom of the planting hole with mixed soil composed of dry sand, soil and eucommia rubber compound at a mass ratio of 1g:1g:0.55g, filling depth is 40cm, transplanting scotch pine seedlings after watering, scotch pine seedlings are more than three years old, the nursery land is flooded before afforestation, the seedlings are removed, and the mixed soil is backfilled after the second water replenishment of the nutrient pot seedlings and watering;

[0047] The eucommia rubber compound is prepared according to the following steps: the corn silk crushed material is mixed with the softened eucommia rubber, and then the mixture is subjected to hydrothermal reaction at 180℃ for 2h, the reaction mixture is filtered to obtain a reaction product, and the reaction product is dried at 80℃ and crushed.

[0048] The eucommia rubber is prepared according to the following steps: eucommia is taken, 8 times of the total weight of the eucommia is added with 5% alkali solution, and the mixture is extracted at 45℃ for 2 times, each time for 3h, and the extracted solution obtained in each time is combined; 3 times of the extracted solution is added with 3% acetic acid solution, and the mixture is continuously extracted at 35℃ overnight, then filtered, the precipitate is collected, the solvent is evaporated, and the mixture is dried at 70℃ to obtain the eucommia rubber;

[0049] The dry sand is 80-mesh fine sand for planting land, and the soil is the soil under the pine forest in the northeast Greater Hinggan Mountains for more than three years;

[0050] Film covering: taking the seedling stem as the center, a colorless transparent film with a size of 75 cm x 75 cm is selected to cover around the root and stem of the seedling, and the film periphery is covered with soil and sealed;

[0051] Cage covering: a protective cage is covered on each seedling to prevent the damage of the mouse rabbits, to shade the seedling, to reduce transpiration, and to prevent wind erosion; the cage is made of willow or thorny-limewood branches, and the cage is in the shape of a cylinder with a small upper opening and a large lower opening, the upper opening has a diameter of about 30 cm, the lower opening has a diameter of about 55 cm, and the height is about 75 cm; when the cage is covered, the lower end of the protective cage is buried in the soil, so that the protective cage is firmly erected on the ground;

[0052] Later management: winter cold prevention measures are taken for the newly planted seedlings, regular inspection is carried out, and the seedlings that do not survive are timely replanted in spring; weeding and care are carried out every year. In case of extreme drought, irrigation and maintenance can be carried out.

[0053] Through statistics, the survival rate of afforestation in the same year is 95%, and the survival rate in three years is 90%.

[0054] Example 2

[0055] A pine water-free afforestation method, comprising the following steps:

[0056] Laying sand barriers: leveling the site of the sand barrier, removing stone chips and other sundries, and selecting willow to form a 2m x 2m net format sand barrier;

[0057] Changing soil for planting: digging planting holes in the gaps of the sand barriers, filling the bottom of the planting hole with mixed soil composed of dry sand, soil and eucommia rubber compound in a mass ratio of 3g:1g:0.55g, filling depth is 40cm, after watering, transplanting pine seedlings, pine seedlings are three-year-old nutrient pot seedlings, before afforestation, the nursery land is flooded, the seedlings are removed, the nutrient pot seedlings are secondarily watered, and then transplanted; and the planting hole is backfilled with mixed soil and watered thoroughly;

[0058] The eucommia rubber compound is prepared according to the following steps: the corn silk crushed material is mixed with softened eucommia rubber, and then subjected to hydrothermal reaction at 180℃ for 2h, the reaction mixture is filtered to obtain a reaction product, which is dried at 80℃ and crushed to obtain the eucommia rubber compound.

[0059] The eucommia rubber is prepared according to the following steps: eucommia is taken, 8 times the amount of 5% alkali solution is added, and the mixture is extracted at 45℃ for 2 times, 3h each time, and the extracted liquid obtained each time is combined; 3 times the amount of 3% acetic acid solution is added to the extracted liquid, and the mixture is continuously extracted at 35℃ overnight, then filtered, the precipitate is collected, the solvent is evaporated, and the mixture is dried at 70℃ to obtain the eucommia rubber;

[0060] Dry sand is fine sand with a particle size of 80 mesh for the planting site, and the soil is the soil under the pine forest in the northeast Greater Hinggan Mountains for more than three years;

[0061] Covering film: taking the trunk of the seedling as the center, a colorless transparent film with a size of 75 cm x 75 cm is selected to cover around the roots and stems of the seedling, and the film is covered with soil and sealed around the film;

[0062] Cage: a protective cage is put on each seedling to prevent the damage of mice and rabbits, to provide shade for the seedling, to reduce transpiration and to prevent wind erosion. The cage is made of willow or thorny-limewood branches, and the cage is in the shape of a cylinder with a small upper end and a large lower end. The diameter of the upper end is about 30 cm, the diameter of the lower end is about 55 cm, and the height is about 75 cm. When the cage is put on, the lower end of the protective cage is buried in the soil to make the protective cage stand firmly on the ground.

[0063] Later management: winter cold prevention measures are taken for newly planted seedlings, and regular inspections are carried out. The seedlings that do not survive are replanted in time in spring. Weeding and care are carried out every year. Irrigation and maintenance can be carried out in case of extreme drought.

[0064] According to statistics, the survival rate of afforestation in the same year is 93%, and the survival rate in three years is 80%.

[0065] Example 3

[0066] A pine free-water afforestation method, comprising the following steps:

[0067] Laying sand barriers: leveling the site where the sand barriers are to be laid, removing debris such as stone chips, and selecting willow to form a 2m x 2m net-shaped sand barrier;

[0068] Planting in mixed soil: digging planting holes in the gaps between the sand barriers, filling the bottom of the planting hole with mixed soil composed of dry sand, soil and eucommia rubber compound in a mass ratio of 1g:1.5g:0.8g, with a filling depth of 40cm, transplanting the pine seedlings after watering, using three-year-old nutrient pot seedlings, ponding the nursery site before afforestation, and transplanting the seedlings after the nutrient pot seedlings are watered for the second time; and backfilling the planting hole with mixed soil and watering thoroughly.

[0069] The eucommia rubber compound is prepared according to the following steps: mixing the corn silk crushed material with softened eucommia rubber, and then water-heating reacting at 180℃ for 2h, filtering the reaction mixture to obtain a reaction product, and drying at 80℃, and crushing to obtain the eucommia rubber compound.

[0070] The eucommia rubber is prepared according to the following steps: taking eucommia, adding an alkali solution with a mass concentration of 5% equivalent to 8 times the total weight of the eucommia, and extracting at 45℃ for 2 times, 3h each time, and combining the extracted liquid obtained each time; adding an acetic acid solution with a mass concentration of 3% equivalent to 3 times the amount of the extracted liquid, and continuing to extract overnight at 35℃, filtering, collecting the precipitate, evaporating the solvent, and drying at 70℃ to obtain the eucommia rubber.

[0071] Dry sand is fine sand with a particle size of 80 mesh for the planting site, and the soil is the soil under the three-year or more Pinus sylvestris var. mongolica forest in the northeast Greater Hinggan Mountains;

[0072] Film mulching: taking the stem of the seedling as the center, a colorless transparent film with a size of 75 cm x 75 cm is selected to cover around the root and stem of the seedling, and the film is covered with soil and sealed around;

[0073] Cage: a protective cage is sleeved on each seedling to prevent the damage of the mouse rabbits, to shade the seedling, to reduce transpiration, and to prevent wind erosion; the cage is made of Salix psammophila or Rhus succedanea branches, and the cage is in the shape of a cylinder with a small upper end and a large lower end, the diameter of the upper end is about 30 cm, the diameter of the lower end is about 55 cm, and the height is about 75 cm; when the cage is sleeved, the lower end of the protective cage is buried in the soil, so that the protective cage is firmly and vertically erected on the ground;

[0074] Later management: winter cold prevention measures are taken for the newly planted seedlings, and regular inspection is carried out; the seedlings that do not survive are timely replanted in spring; and weeding and care are carried out every year. In case of extremely dry weather, irrigation and maintenance can be carried out.

[0075] According to statistics, the survival rate of afforestation in the same year is 97%, and the survival rate in three years is 95%.

[0076] Example 4

[0077] A Pinus sylvestris water-free afforestation method, comprising the following steps:

[0078] Laying sand barriers: leveling the site where the sand barriers are arranged, removing stone chips and other sundries, and selecting Salix to form a 2m x 2m net format sand barrier;

[0079] Planting in mixed soil: digging planting holes in the gaps between the sand barriers, filling the bottom of the planting hole with mixed soil composed of dry sand, soil and eucommia rubber compound at a mass ratio of 3g:1g:0.8g, the filling depth is 40cm, after watering, the Pinus sylvestris seedlings are transplanted, the Pinus sylvestris seedlings are three-year or more nutrient pot seedlings, the seedling field is flooded before afforestation, the seedlings are lifted, the nutrient pot seedlings are secondarily watered, and then transplanted; and the planting hole is backfilled with mixed soil and watered thoroughly;

[0080] The eucommia rubber compound is prepared according to the following steps: the corn silk crushed material is mixed with softened eucommia rubber, and then subjected to hydrothermal reaction at 180℃ for 2h, the reaction mixture is filtered to obtain a reaction product, which is dried at 80℃ and crushed to obtain the eucommia rubber compound.

[0081] The eucommia rubber is prepared according to the following steps: eucommia is taken, 8 times the amount of 5% alkali solution with respect to the total weight of the eucommia is added, and the mixture is extracted at 45℃ for 2 times, 3h each time, and the extracted solutions obtained each time are combined; 3 times the amount of 3% acetic acid solution with respect to the total weight of the extracted solution is added, and the mixture is continuously extracted at 35℃ overnight, then filtered, the precipitate is collected, the solvent is evaporated, and the mixture is dried at 70℃ to obtain the eucommia rubber;

[0082] The dry sand is fine sand with a particle size of 80 microns, and the soil is soil under a pine forest in the northeast Greater Hinggan Mountains for more than three years;

[0083] Film covering: taking the stem of the seedling as the center, a colorless transparent film with a size of 75 cm x 75 cm is selected to cover around the root and stem of the seedling, and the film is covered with soil and sealed around;

[0084] Cage covering: a protective cage is covered on each seedling to prevent damage by mice and rabbits, provide shade for the seedling, reduce transpiration, and prevent wind erosion. The cage is made of willow or thorny-limewood branches, and has a small upper opening, a large lower opening, and a height of about 75 cm. When covering the cage, the lower end of the protective cage is buried in the soil to make the protective cage stand firmly on the ground.

[0085] Later management: winter cold protection measures are taken for newly planted seedlings, and regular inspections are carried out. The seedlings that do not survive are replanted in spring in time. Weeding and care are carried out every year. Irrigation and maintenance can be carried out in case of extreme drought.

[0086] According to statistics, the survival rate of afforestation in the same year is 94%, and the survival rate in three years is 91%.

[0087] Example 5

[0088] A pine water-free afforestation method, comprising the following steps:

[0089] Laying sand barriers: leveling the site where the sand barriers are to be laid, removing debris such as stone chips, and selecting willow to form a 2m x 2m net format sand barrier;

[0090] Soil replacement and planting: digging planting holes in the gaps between the sand barriers, filling the bottom of the planting hole with a mixture of dry sand, soil, and eucommia rubber compound at a mass ratio of 2g:1g:0.6g, with a filling depth of 40cm, watering, and then transplanting the pine seedlings. The pine seedlings are three-year-old pot seedlings. The nursery site is flooded before afforestation, the seedlings are removed, and the pot seedlings are transplanted after being watered for the second time. The planting hole is backfilled with the mixture and watered thoroughly.

[0091] The eucommia rubber compound is prepared by the following steps: mixing the corn silk crushed material with softened eucommia rubber, then water-heating reacting at 180°C for 2h, filtering the reaction mixture to obtain a reaction product, and drying at 80°C and crushing.

[0092] The eucommia rubber is prepared by the following steps: taking eucommia, adding an alkali solution with a mass concentration of 5% equivalent to 8 times the total weight of the eucommia, extracting at 45°C for 2 times, each for 3h, combining the extracted liquid obtained each time, adding an acetic acid solution with a mass concentration of 3% equivalent to 3 times the amount of the extracted liquid, continuing to extract at 35°C overnight, filtering, collecting the precipitate, evaporating the solvent, and drying at 70°C to obtain the eucommia rubber.

[0093] Dry sand is fine sand with a particle size of 80 mesh for the planting site, and the soil is the soil under the three-year or more Pinus sylvestris var. mongolica forest in the northeast Greater Hinggan Mountains;

[0094] Film mulching: taking the stem of the seedling as the center, a colorless transparent film with a size of 75 cm x 75 cm is selected to cover around the root and stem of the seedling, and the film is covered with soil and sealed around;

[0095] Cage: a protective cage is sleeved on each seedling to prevent the damage of the mouse rabbits, to shade the seedling, to reduce transpiration, and to prevent wind erosion; the cage is made of Salix psammophila or Rhus succedanea branches, and the cage is in the shape of a cylinder with a small upper opening and a large lower opening, the upper opening has a diameter of about 30 cm, the lower opening has a diameter of about 55 cm, and the height is about 75 cm; when the cage is sleeved, the lower end of the protective cage is buried in the soil, so that the protective cage is firmly and vertically erected on the ground;

[0096] Later management: winter cold prevention measures are taken for the newly planted seedlings, and regular inspection is carried out, and the seedlings that do not survive are timely replanted in spring; weeding and care are carried out every year. In case of extreme drought, irrigation and maintenance can be carried out.

[0097] According to statistics, the survival rate of afforestation in the same year is 98%, and the survival rate in three years is 94%.

[0098] Example 6

[0099] A Pinus sylvestris water-free afforestation method, comprising the following steps:

[0100] Laying sand barriers: leveling the site where the sand barriers are arranged, removing debris such as stone chips, and selecting Salix to form a 2m x 2m net format sand barrier;

[0101] Changing soil for planting: digging planting holes in the gaps between the sand barriers, filling the bottom of the planting hole with mixed soil composed of dry sand, soil and eucommia rubber compound in a mass ratio of 2g:1g:0.6g, the filling depth is 40cm, after watering, transplanting Pinus sylvestris seedlings, Pinus sylvestris seedlings are three-year or more nutrient pot seedlings, the nursery site is flooded before afforestation, the seedlings are removed, and the nutrient pot seedlings are transplanted after being watered for the second time; and the planting hole is backfilled with mixed soil and watered thoroughly;

[0102] The eucommia rubber compound is prepared according to the following steps: the corn silk crushed material is mixed with softened eucommia rubber, and then water heating reaction is carried out at 180℃ for 2h, the reaction mixture is filtered to obtain a reaction product, which is dried at 80℃ and crushed to obtain the eucommia rubber compound.

[0103] The eucommia rubber is prepared according to the following steps: taking eucommia, adding 10 times the amount of lye with a mass concentration of 15% equivalent to the total weight, and extracting at 90℃ for 3 times, 2h each time, and combining the extracted liquid obtained each time; adding 3 times the amount of 3% acetic acid solution with a mass concentration to the extracted liquid, and continuing to extract overnight at 35℃, filtering, collecting the precipitate, evaporating the solvent, and drying at 70℃ to obtain the eucommia rubber.

[0104] Dry sand is fine sand with a particle size of 80 μm for the planting site, and the soil is the soil under the pine forest in the northeast Greater Hinggan Mountains for more than three years;

[0105] Film mulching: taking the stem of the seedling as the center, a colorless transparent film with a size of 75 cm x 75 cm is selected to cover around the root and stem of the seedling, and the film is covered with soil and sealed around;

[0106] Cage: a protective cage is sleeved on each seedling to prevent the damage of the mouse rabbits, to shade the seedling, to reduce transpiration, and to prevent wind erosion; the cage is made of willow or thorny-limewood branches, and the cage is in the shape of a cylinder with a small upper opening and a large lower opening, the upper opening has a diameter of about 30 cm, the lower opening has a diameter of about 55 cm, and the height is about 75 cm; when the cage is sleeved, the lower end of the protective cage is buried in the soil, so that the protective cage is firmly and vertically erected on the ground;

[0107] Later management: winter cold prevention measures are taken for the newly planted seedlings, and regular inspection is carried out, and the seedlings that do not survive are timely replanted in spring; weeding and care are carried out every year. In case of extreme drought, irrigation and maintenance can be carried out.

[0108] According to statistics, the survival rate of afforestation in the same year is 97%, and the survival rate in three years is 93%.

[0109] Example 7

[0110] A pine water-free afforestation method, comprising the following steps:

[0111] Laying sand barriers: leveling the site of the sand barrier, removing debris such as stone chips, and selecting willow to form a 2m x 2m net format sand barrier;

[0112] Changing soil for planting: digging planting holes in the gaps between the sand barriers, filling the bottom of the planting hole with mixed soil composed of dry sand, soil and eucommia rubber compound in a mass ratio of 2g:1g:0.6g, the filling depth is 40cm, after watering, the pine seedlings are transplanted, the pine seedlings are three-year-old nutrient pot seedlings, the nursery land is flooded before afforestation, the seedlings are removed, the nutrient pot seedlings are secondarily watered, and then transplanted; and the planting hole is backfilled with mixed soil and watered thoroughly;

[0113] The eucommia rubber compound is prepared according to the following steps: the corn silk crushed material is mixed with softened eucommia rubber, and then subjected to hydrothermal reaction at 180℃ for 2h, the reaction mixture is filtered to obtain a reaction product, which is dried at 80℃ and crushed to obtain the eucommia rubber compound.

[0114] The eucommia rubber is prepared according to the following steps: eucommia is taken, 8 times the amount of 5% alkali solution is added, and the mixture is extracted at 45℃ for 2 times, 3h each time, and the extracted liquid obtained each time is combined; 3 times the amount of 5% acetic acid solution is added to the extracted liquid, and the mixture is continuously extracted at 45℃ overnight, filtered, the precipitate is collected, the solvent is evaporated, and the mixture is dried at 70℃ to obtain the eucommia rubber.

[0115] Dry sand is fine sand for planting land over 80 purposes, and the soil is the soil under the pine forest in the northeast Greater Khingan Range for more than three years;

[0116] Covering film: taking the trunk of the seedling as the center, a colorless transparent film with a size of 75 cm x 75 cm is selected to cover around the roots and stems of the seedling, and the film is covered with soil and sealed around the film;

[0117] Cage: each seedling is sleeved with a protective cage to prevent mouse rabbits from damaging, at the same time, the seedling is shaded, transpiration is reduced, and wind erosion is prevented; the cage material is Salix or Rhus branches, the cage is a cylinder with a small upper part and a large lower part, the upper opening diameter is about 30 cm, the lower opening diameter is about 55 cm, and the height is about 75 cm; when sleeving, the lower end of the protective cage is buried in the soil, so that the protective cage is firmly upright on the ground;

[0118] Later management: winter cold prevention measures are taken for newly planted seedlings, regular inspection is carried out, and the seedlings that do not survive are timely replanted in spring; weeding and care are carried out every year. In case of extreme drought weather, irrigation maintenance can be carried out.

[0119] According to statistics, the survival rate of afforestation in the same year is 95%, and the survival rate in three years is 90%.

[0120] Example 8

[0121] A pine free-water afforestation method, comprising the following steps:

[0122] Laying sand barrier: leveling the sand barrier site, removing debris such as stone chips, and selecting straw to form a 2.5 m x 2.5 m net format sand barrier;

[0123] Changing soil for planting: digging planting holes in the gaps of the sand barrier, filling the bottom of the planting hole with mixed soil composed of dry sand, soil and eucommia rubber compound in a mass ratio of 2g:1g:0.6g, filling depth is 50cm, after watering, transplanting pine seedlings, pine seedlings are three-year-old nutrient pot seedlings, the nursery land is flooded before afforestation, the seedlings are removed, the nutrient pot seedlings are secondarily watered, and then transplanted; and the planting hole is backfilled with mixed soil and watered thoroughly;

[0124] The eucommia rubber compound is prepared according to the following steps: corn silk crushed material is mixed with softened eucommia rubber, and then water heating reaction is carried out at 180℃ for 2h, the reaction mixture is filtered to obtain a reaction product, which is dried at 80℃ and crushed.

[0125] The eucommia ulmoides gum is prepared according to the following steps: eucommia ulmoides is taken, 8 times of the total weight of eucommia ulmoides is added with 5% alkali solution, and the mixture is extracted at 45 DEG C for 2 times, each for 3 hours, and the extracted solution obtained each time is combined; 3 times of the extracted solution is added with 3% acetic acid solution, and the mixture is continuously extracted at 35 DEG C overnight, and then filtered, and the precipitate is collected, evaporated, dried at 70 DEG C, and thus the eucommia ulmoides gum is obtained;

[0126] The dry sand is fine sand with a particle size of 80 mesh, and the soil is soil under a pine forest in the northeast Daxing'anling Mountain region for more than 3 years;

[0127] Film covering: taking the stem of the seedling as the center, a colorless and transparent film with a size of 80 cm*80 cm is selected to cover the root and stem of the seedling, and the film is covered with soil and sealed at the periphery;

[0128] Cage covering: a protective cage is covered on each seedling to prevent damage by mice and hares, to provide shade for the seedling, to reduce transpiration, and to prevent wind erosion; the cage is made of branches of sand willow or tamarisk, and has a small upper opening, a large lower opening, and a height of about 75 cm; when the cage is covered, the lower end of the protective cage is buried in the soil, so that the protective cage is firmly and vertically arranged on the ground;

[0129] Later management: winter cold protection measures are taken for the newly planted seedlings, and the seedlings are regularly inspected; the seedlings that do not survive are timely replanted in spring; and weeding and care are performed every year. Irrigation is performed when extremely dry weather occurs.

[0130] According to statistics, the survival rate of afforestation in the same year is 95%, and the survival rate in three years is 89%.

[0131] Example 9

[0132] A pine water-free afforestation method, comprising the following steps:

[0133] Sand barrier laying: the sand barrier laying site is leveled, and debris such as stone chips is removed, and a sand barrier with a network pattern of 2 m*2 m is selected and arranged;

[0134] Soil replacement and planting: a planting hole is dug in the gap between the sand barriers, the bottom of the planting hole is filled with mixed soil composed of dry sand, soil, and eucommia ulmoides gum compound at a mass ratio of 1g:1g:0.55g, the filling depth is 60 cm, the pine seedlings are transplanted after watering, the pine seedlings are three-year-old nutrient pot seedlings, the seedling bed is flooded before afforestation, the seedlings are removed, the nutrient pot seedlings are transplanted after being watered for the second time, and the planting hole is backfilled with the mixed soil and watered thoroughly.

[0135] The eucommia ulmoides gum compound is prepared according to the following steps: the corn silk crushed material is mixed with softened eucommia ulmoides gum, and then the mixture is subjected to hydrothermal reaction at 180 DEG C for 2 hours, the reaction mixture is filtered to obtain a reaction product, and the reaction product is dried at 80 DEG C and crushed, and thus the eucommia ulmoides gum compound is obtained.

[0136] The eucommia ulmoides gum is prepared according to the following steps: eucommia ulmoides is taken, 8 times of the total weight of eucommia ulmoides is added with 5% alkali solution, and the mixture is extracted at 45°C for 2 times, each for 3 hours, and the extracted solution obtained each time is combined; 3 times of the extracted solution is added with 3% acetic acid solution, and the mixture is extracted at 35°C overnight, and then filtered, and the precipitate is collected, evaporated, dried at 70°C, and thus the eucommia ulmoides gum is obtained;

[0137] The dry sand is fine sand with a size of 80 meshes, and the soil is soil under a pine forest in the northeast Daxing'anling Mountain region for more than 5 years;

[0138] Film covering: taking the stem of the seedling as the center, a colorless and transparent film with a size of 75 cm x 75 cm is selected to cover the root and stem of the seedling, and the film is covered with soil and sealed at the periphery;

[0139] Cage covering: a protective cage is covered on each seedling to prevent damage by mice and rabbits, to provide shade for the seedling, to reduce transpiration, and to prevent wind erosion; the cage is made of branches of sand willow or tamarisk, and the cage is in the shape of a cylinder with a small upper end and a large lower end, with an upper end diameter of about 30 cm, a lower end diameter of about 55 cm, and a height of about 75 cm; when the cage is covered, the lower end of the protective cage is buried in the soil, so that the protective cage is firmly and vertically arranged on the ground;

[0140] Later management: winter cold prevention measures are taken for the newly planted seedlings, and the seedlings are regularly checked, and the seedlings that do not survive are timely replanted in spring; and weeding and care are performed every year. In case of extremely dry weather, irrigation and maintenance can be performed.

[0141] According to statistics, the survival rate of afforestation in the same year is 94%, and the survival rate in three years is 91%.

[0142] Example 10

[0143] A pine water-free afforestation method, comprising the following steps:

[0144] Sand barrier laying: the site where the sand barrier is arranged is leveled, and debris such as stone chips is removed, and a sand barrier with a network pattern of 2 m x 2 m is selected and arranged by using sand willow;

[0145] Soil replacement and planting: a planting hole is dug in the gap between the sand barriers, the bottom of the planting hole is filled with mixed soil composed of dry sand, soil and eucommia ulmoides gum compound at a mass ratio of 1 g: 1 g: 0.55 g, the filling depth is 40 cm, the pine seedlings are transplanted after watering, the pine seedlings are three-year-old nutrient pot seedlings, the seedling bed is flooded before afforestation, the seedlings are removed, the nutrient pot seedlings are secondarily watered, and then transplanted; and the planting hole is backfilled with the mixed soil and watered thoroughly.

[0146] The eucommia ulmoides gum compound is prepared according to the following steps: the corn silk crushed material is mixed with softened eucommia ulmoides gum, and then the mixture is subjected to hydrothermal reaction at 240°C for 1 hour, the reaction mixture is filtered to obtain a reaction product, and the reaction product is dried at 80°C and crushed, and thus the eucommia ulmoides gum compound is obtained.

[0147] The eucommia ulmoides gum is prepared according to the following steps: eucommia ulmoides is taken, 8 times of the total weight of eucommia ulmoides is added with 5% alkali solution, and the mixture is extracted at 45°C for 2 times, each for 3 hours, and the extracted solution obtained each time is combined; 3 times of the extracted solution is added with 3% acetic acid solution, and the mixture is continuously extracted at 35°C overnight, and then filtered, and the precipitate is collected, evaporated, dried at 70°C, and thus the eucommia ulmoides gum is obtained;

[0148] The dry sand is fine sand with a size of 80 meshes, and the soil is soil under a pine forest in the northeast Daxing'anling Mountain region for more than 3 years;

[0149] Film covering: taking the stem of the seedling as the center, a colorless and transparent film with a size of 75 cm x 75 cm is selected to cover around the root and stem of the seedling, and the film is covered with soil and sealed at the periphery;

[0150] Cage covering: a protective cage is covered on each seedling to prevent damage by mice and hares, to provide shade for the seedling, to reduce transpiration, and to prevent wind erosion; the cage is made of branches of sand willow or tamarisk, and the cage is in the shape of a cylinder with a small upper end and a large lower end, with an upper end diameter of about 30 cm, a lower end diameter of about 55 cm, and a height of about 75 cm; when the cage is covered, the lower end of the protective cage is buried in the soil, so that the protective cage is firmly and vertically erected on the ground;

[0151] Later management: winter cold protection measures are taken for the newly planted seedlings, and the seedlings are regularly checked, and the seedlings that do not survive are timely replanted in spring; and weeding and care are performed every year. Irrigation and maintenance can be performed in case of extremely dry weather.

[0152] According to statistics, the survival rate of afforestation in the same year is 98%, and the survival rate in three years is 92%.

[0153] Example 11

[0154] A pine water-free afforestation method, comprising the following steps:

[0155] Sand barrier laying: the site where the sand barrier is laid is leveled, and debris such as stone chips is removed, and a sand barrier with a network pattern of 2 m x 2 m is selected and laid with sand willow;

[0156] Soil replacement and planting: a planting hole is dug in the gap between the sand barriers, the bottom of the planting hole is filled with mixed soil composed of dry sand, soil, and eucommia ulmoides gum compound in a mass ratio of 1 g: 1 g: 0.55 g, the filling depth is 40 cm, the pine seedlings are transplanted after watering, the pine seedlings are three-year-old nutrient pot seedlings, the seedling bed is flooded before afforestation, the seedlings are removed, the nutrient pot seedlings are secondarily watered, and then transplanted; and the planting hole is backfilled with the mixed soil and watered thoroughly;

[0157] The eucommia ulmoides gum compound is prepared according to the following steps: the corn silk crushed material is mixed with softened eucommia ulmoides gum, and then subjected to hydrothermal reaction at 200°C for 1.5 hours, the reaction mixture is filtered to obtain a reaction product, and then dried at 80°C and crushed, and thus the eucommia ulmoides gum compound is obtained.

[0158] The eucommia ulmoides gum is prepared according to the following steps: eucommia ulmoides is taken, 8 times of the total weight of eucommia ulmoides is added with 5% alkali solution, and the mixture is extracted at 45℃ for 2 times, each for 3 hours, and the extracted solution obtained each time is combined; 3 times of the extracted solution is added with 3% acetic acid solution, and the mixture is extracted at 35℃ overnight, then filtered, and the precipitate is collected, evaporated, dried at 70℃, and the eucommia ulmoides gum is obtained;

[0159] The dry sand is fine sand with a particle size of 80 meshes, and the soil is soil under a pine forest in the northeast Daxing'anling Mountains for more than three years;

[0160] Film covering: taking the stem of the seedling as the center, a colorless and transparent film with a size of 75cm×75cm is selected to cover around the root and stem of the seedling, and the film is covered with soil and sealed at the periphery;

[0161] Cage covering: a protective cage is covered on each seedling to prevent damage by mice and hares, provide shade for the seedling, reduce transpiration, and prevent wind erosion; the cage is made of branches of sand willow or tamarisk, and has a small upper opening, a large lower opening, and a height of about 75cm; when the cage is covered, the lower end of the protective cage is buried in the soil to make the protective cage stand firmly on the ground;

[0162] Later management: winter cold prevention measures are taken for the newly planted seedlings, and the seedlings that do not survive are replanted in time in spring; weeding and care are performed every year, and irrigation is performed when extremely dry weather occurs.

[0163] According to statistics, the survival rate of afforestation in the same year is 97%, and the survival rate in three years is 93%.

[0164] Comparative example 1

[0165] A pine water-free afforestation method, comprising the following steps:

[0166] Sand barrier laying: the site where the sand barrier is laid is leveled, and debris such as stone chips is removed, and a 2m×2m net-shaped sand barrier is laid by using sand willow;

[0167] Soil replacement and planting: a planting hole is dug in the gap between the sand barriers, the bottom of the planting hole is filled with mixed soil mixed by dry sand, soil, and softened eucommia ulmoides gum according to a mass ratio of 1g:1g:0.55g, the filling depth is 40cm, the pine seedlings are transplanted after watering, the pine seedlings are three-year-old nutrient pot seedlings, the seedling bed is flooded before afforestation, the seedlings are removed, the nutrient pot seedlings are transplanted after being watered for the second time, and the planting hole is backfilled with the mixed soil and watered thoroughly;

[0168] The eucommia ulmoides gum is prepared according to the following steps: eucommia ulmoides is taken, 8 times of the total weight of eucommia ulmoides is added with 5% alkali solution, and the mixture is extracted at 45 DEG C for 2 times, each for 3 hours, and the extracted solution obtained each time is combined; 3 times of the extracted solution is added with 3% acetic acid solution, and the mixture is extracted at 35 DEG C overnight, then filtered, and the precipitate is collected, evaporated, dried at 70 DEG C, and the eucommia ulmoides gum is obtained;

[0169] The dry sand is over 80 mesh fine sand, and the soil is the soil under the pine forest in the northeast Greater Hinggan Mountain region for more than three years;

[0170] Film covering: taking the stem of the seedling as the center, a colorless and transparent film with a size of 75 cm*75 cm is selected to cover around the root and stem of the seedling, and the film is covered with soil and sealed at the periphery;

[0171] Cage covering: a protective cage is covered on each seedling to prevent the damage of the mouse rabbits, to provide shade for the seedling, to reduce transpiration, and to prevent wind erosion; the cage is made of sand willow or thorny-limewood branches, and the cage is in the shape of a cylinder with a small top and a large bottom, the top has a diameter of about 30 cm, the bottom has a diameter of about 55 cm, and the height is about 75 cm; when the cage is covered, the lower end of the protective cage is buried in the soil, so that the protective cage is firmly and vertically erected on the ground;

[0172] Later management: winter cold prevention measures are taken for the newly planted seedlings, and the seedlings are regularly checked; the seedlings that do not survive are timely replanted in spring; and the weeding and care work is carried out every year. When extremely dry weather occurs, irrigation and maintenance can be carried out.

[0173] According to statistics, the survival rate of afforestation in the same year is 86%, and the survival rate in three years is 75%.

[0174] Comparative example 2

[0175] A pine water-free afforestation method, comprising the following steps:

[0176] Sand barrier laying: the sand barrier laying site is leveled, and the debris such as stone chips is removed, and the sand willow is selected to form a 2m*2m net format sand barrier;

[0177] Soil replacement and planting: a planting hole is dug in the gap between the sand barriers, the bottom of the planting hole is filled with mixed soil mixed by dry sand, soil and corn cob crushed material according to a mass ratio of 1g:1g:0.8g, the filling depth is 40cm, the pine seedlings are transplanted after watering, the pine seedlings are three-year-old nutrient pot seedlings, the seedling bed is flooded before afforestation, the seedlings are taken, the nutrient pot seedlings are secondarily watered before transplanting; and the planting hole is backfilled with the mixed soil and watered thoroughly;

[0178] The dry sand is over 80 mesh fine sand, and the soil is the soil under the pine forest in the northeast Greater Hinggan Mountain region for more than three years;

[0179] Film covering: taking the seedling stem as the center, a colorless transparent film with a size of 75 cm x 75 cm is selected to cover around the root and stem of the seedling, and the film periphery is covered with soil and sealed;

[0180] Cage covering: a protective cage is covered on each seedling to prevent the damage of mice and rabbits, to shade the seedling, to reduce transpiration, and to prevent wind erosion; the cage is made of Salix psammophila or Rhus succedanea branches, and the cage is in the shape of a cylinder with a small upper end and a large lower end, the upper end has a diameter of about 30 cm, the lower end has a diameter of about 55 cm, and the height is about 75 cm; when the cage is covered, the lower end of the protective cage is buried in the soil, so that the protective cage is firmly erected on the ground;

[0181] Later management: winter cold protection measures are taken for the newly planted seedlings, and regular inspection is carried out, and the seedlings that do not survive are replanted in time in spring; weeding and care are carried out every year. In case of extreme drought weather, irrigation and maintenance can be carried out.

[0182] Through statistics, the survival rate of afforestation in the same year is 85%, and the survival rate in three years is 73%.

[0183] Comparative example 3

[0184] A water-free afforestation method of Pinus sylvestris, comprising the following steps:

[0185] Laying sand barrier: leveling the site of the sand barrier, removing stone chips and other sundries, and selecting Salix to form a 2m x 2m net format sand barrier;

[0186] Changing soil for planting: digging planting holes in the gaps of the sand barrier, filling the bottom of the planting hole with mixed soil composed of dry sand, soil and eucommia rubber compound at a mass ratio of 1g:1g:0.55g, the filling depth is 40cm, after watering, transplanting Pinus sylvestris seedlings, the Pinus sylvestris seedlings are more than three years old, the seedling nursery is irrigated before afforestation, the seedlings are lifted, and the nutrient pot seedlings are transplanted after being watered for the second time; and the planting hole is backfilled with mixed soil and watered thoroughly;

[0187] The eucommia rubber compound is prepared according to the following steps: the corn silk crushed material is mixed with softened eucommia rubber, and then water heating reaction is carried out at 180℃ for 2h, the reaction mixture is filtered to obtain a reaction product, which is dried at 80℃ and crushed to obtain the eucommia rubber compound.

[0188] The eucommia rubber is prepared according to the following steps: eucommia is taken, 8 times the amount of 5% alkali solution with respect to the total weight of eucommia is added, and the mixture is extracted at 45℃ for 2 times, each time for 3h, and the extracted liquid obtained each time is combined; 3 times the amount of 3% acetic acid solution with respect to the total weight of eucommia is added to the extracted liquid, and the mixture is continuously extracted at 35℃ overnight, then filtered, the precipitate is collected, the solvent is evaporated, and the mixture is dried at 70℃ to obtain the eucommia rubber;

[0189] The dry sand is 80-mesh fine sand for planting, and the soil is the soil of the potato planting area in the Mu Us Desert in Yulin;

[0190] Film covering: taking the seedling stem as the center, a colorless transparent film with a size of 75 cm*75 cm is selected to cover the seedling roots, and the film periphery is covered with soil and sealed;

[0191] Cage covering: a protective cage is covered on each seedling to prevent the damage of mice and rabbits, to provide shade for the seedling, to reduce transpiration and prevent wind erosion; the cage is made of sand willow or thorny-limewood branches, and the cage is in a cylindrical shape with a small upper opening and a large lower opening, the upper opening has a diameter of about 30 cm, the lower opening has a diameter of about 55 cm, and the height is about 75 cm; when the cage is covered, the lower end of the protective cage is buried in the soil, so that the protective cage is firmly erected on the ground;

[0192] Later management: winter cold prevention measures are taken for the newly planted seedlings, and regular inspection is carried out, and the seedlings that do not survive are timely replanted in spring; weeding and care are carried out every year. In case of extreme drought weather, irrigation and maintenance can be carried out.

[0193] Through statistics, the survival rate of afforestation in the same year is 90%, and the survival rate in three years is 84%.

[0194] The afforestation sites of the embodiments and the comparative examples of the present application are all in the Mu Us sandy land of Yulin, and the planting time is in spring, and the planting depth is about 40-60 cm; 3 mu of sandy land is selected as the afforestation site for each embodiment and comparative example. 300 g of soil with a depth of about 40 cm from the root of the seedling is randomly weighed in the afforestation site of each embodiment and comparative example at the 7th day, the 15th day, the 25th day, the 40th day, the 50th day and the 60th day after natural precipitation, and the soil moisture content is measured by weighing method. During the soil collection period, the planting area again rains on the 43rd day from the day of precipitation, and the precipitation is about 3.25 mm. The results are shown in Table 1.

[0195] Table 1 Soil moisture content of the root system of each embodiment at different times (%)

[0196] Packet Day 7 Day 15 Day 25 Day 40 Day 50 Day 60 Example 1 10.14 8.69 7.36 6.57 8.76 6.96 Example 2 9.98 8.37 7.21 6.69 9.07 6.84 Example 3 10.06 8.71 7.34 6.51 8.21 6.59 Example 4 10.11 8.62 8.09 6.55 8.19 6.88 Example 5 9.87 9.04 7.85 6.43 9.04 6.75 Example 6 9.83 8.18 7.11 6.62 8.87 6.69 Example 7 10.09 8.32 7.96 6.49 8.96 7.23 Example 8 10.23 8.24 8.48 6.46 8.11 6.81 Example 9 10.06 9.17 7.87 6.43 8.25 6.72 Comparative Example 1 7.36 5.22 3.03 2.23 5.03 2.18 Comparative Example 2 6.58 5.05 2.98 2.08 4.82 2.05 Comparative Example 3 8.52 7.13 6.46 2.97 5.84 3.54

[0197] As shown in Table 1, with the extension of time, the water content in the soil gradually decreases, which may be that the water storage in the sponge structure gradually decreases with time, so that the water gradually infiltrated into the soil also decreases, but the water content in the root system soil of the Pinus sylvestris var. mongolica of each embodiment is basically maintained above 6.4% within 40 days, which can meet the long-term growth requirements of Pinus sylvestris var. mongolica.

[0198] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for afforestation of Pinus sylvestris without watering, characterized in that, Includes the following steps: Laying sand barriers: Setting up grid sand barriers in sandy areas; Soil replacement and planting: Dig planting holes in the gaps of the sand barriers, fill the bottom of the planting holes with mixed soil, water them, transplant the Pinus sylvestris seedlings, and backfill the planting holes with the mixed soil and water them thoroughly; wherein, the mixed soil is made by mixing dry sand, soil, and Eucommia ulmoides gum compound in a mass ratio of 1~3∶1∶0.55~0.8; the Eucommia ulmoides gum compound is obtained by mixing corn silk powder with softened Eucommia ulmoides gum and carrying out a hydrothermal reaction; the hydrothermal reaction is carried out at 180℃~240℃ for 1h~2h; Mulching: Use colorless and transparent film to cover around the roots and stems of the seedlings, and cover the film with soil and seal the pot. Cage covering: Each seedling is covered with a protective cage; Post-management; The mixed soil is made by mixing dry sand, soil and Eucommia ulmoides gum compound in a mass ratio of 3:1:0.

55. The Eucommia ulmoides gum is prepared according to the following steps: Take Eucommia ulmoides, add an alkaline solution with a mass concentration of 5%~15%, and extract it 2~3 times at 45℃~90℃, each time for 2h~3h, and combine the extracts obtained each time. Add a 3%~5% acetic acid solution to the extract, continue extraction overnight at 35℃~45℃, filter, collect the precipitate, evaporate the solvent, and dry to obtain Eucommia gum; The soil is selected from the soil under the Pinus sylvestris forest that is more than three years old or the soil from which Pinus sylvestris seedlings are cultivated, and the dry sand is selected from the sandy soil of the planting sandy land.

2. The method for afforestation of Pinus sylvestris without watering according to claim 1, characterized in that, The depth of the mixed soil at the bottom of the planting hole should be 40cm to 60cm.

3. The method for afforestation of Pinus sylvestris without watering according to claim 1, characterized in that, The sand barriers are constructed by using sand willow, wheat straw, or stalks to form a grid-like structure of 2-2.5m x 2-2.5m.

4. The method for afforestation of Pinus sylvestris without watering according to claim 1, characterized in that, The seedlings of Pinus sylvestris are seedlings that are more than three years old and are grown in nutrient pots. Before planting, the nursery is flooded with water, the seedlings are dug up, and after watering the nutrient pot seedlings twice, they are transplanted.

5. The method for afforestation of Pinus sylvestris without watering according to claim 1, characterized in that, The size of the film is 75~100cm × 75~100cm.

6. The method for afforestation of Pinus sylvestris without watering according to claim 1, characterized in that, During the management process, winter protection measures are taken for newly planted seedlings.

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