Field returning method for myricaria laxiflora

Abstract

The invention provides a field returning method of myricaria laxiflora, which comprises the following steps: planting myricaria laxiflora plants in a returning manner by taking a sandy beach land as a returning point, and in the sandy beach land, the flood period flooding time is less than or equal to 5 months, the annual rainfall is 1000-1200 mm, the altitude is 40-150 m, the annual average temperature is 17-19 DEG C, the annual minimum temperature is more than or equal to-9 DEG C, and the annual maximum temperature is less than or equal to 42 DEG C. According to the field regression method, the flooding resistance and washing resistance of the myricaria laxiflora can be improved, and the survival rate and the preservation rate of field regression of the myricaria laxiflora can be increased.

Description

Technical Field

[0001] The invention belongs to the technical field of wild reintroduction of rare and endangered plants, and particularly relates to a method for reintroducing Eupatorium sparsely flowered into the wild. Background Art

[0002] Myricaria laxiflora (Franch.) PY Zhang et YJ Zhang is a perennial shrub of the genus Myricaria in the family Tamaricaceae. It is a national Class II protected plant. It was originally scattered on the sandy or rocky river beaches on both sides of the Yangtze River in Zigui, Badong, Hubei and Wushan Gorge, Sichuan, and is known as the "Three Gorges Wonder". Myricaria laxiflora has the functions of wave-breaking and sand-fixing, soil-fixing and slope protection, and beautifying embankments, and has a very high ecological application value.

[0003] The sparse-flowered water cypress is native to the riverbed of the Yangtze River from Yichang City, Hubei Province to Chongqing City, and is mainly distributed in the Three Gorges Reservoir area. In order to adapt to the seasonal fluctuations in the water level of the Yangtze River, the sparse-flowered water cypress has formed an off-season growth rhythm of dormancy in summer and growth in winter. However, after the construction of the Three Gorges Dam, due to the needs of flood control and power generation, the Three Gorges Reservoir "stores water in winter and discharges water in summer", forming a pattern of high water levels in winter and low water levels in summer. This pattern is contrary to the off-season growth rhythm of the sparse-flowered water cypress, resulting in the destruction of the habitat of the sparse-flowered water cypress and the fragmentation of its habitat. Coupled with the physiological and ecological characteristics of the species, the population renewal of the sparse-flowered water cypress has been severely disturbed, and the population has decreased sharply. According to the IUCN species red endangered level and standard evaluation, the sparse-flowered water cypress belongs to the "endangered (EN)" species.

[0004] At present, certain results have been achieved in the ex situ protection, cutting propagation, and seed propagation of Eupatorium sparsely flowered. It is necessary and ecologically significant to introduce artificially bred Eupatorium sparsely flowered into nature, expand its wild population, and carry out wild reintroduction.

[0005] In addition, the water level pattern of the Three Gorges Reservoir, which is "storing in winter and discharging in summer", is opposite to the growth rhythm of Eupatorium sparsely flowered, and in recent years, researchers have discovered that there are scattered wild populations of Eupatorium sparsely flowered in the wild in the Yichang section of the Yangtze River downstream of the Three Gorges Dam. Therefore, in order to adapt to the growth rhythm of Eupatorium sparsely flowered and expand the wild population of Eupatorium sparsely flowered, it is necessary to return the artificially bred Eupatorium sparsely flowered to the wild. However, the arrival of the summer rainy season and the flood discharge of the Three Gorges Dam and Gezhouba Dam have caused the water level of the Yangtze River to rise, and the scouring force of the water flow has increased, posing greater challenges to the plant's rooting and not being washed away by the water flow, resulting in a significant decrease in the survival rate and preservation rate of Eupatorium sparsely flowered in the wild.

[0006] Therefore, how to improve the ability of the sparse-flowered water cypress to resist flooding and scouring, as well as the survival rate and preservation rate of the sparse-flowered water cypress when returning to the wild are technical problems that need to be urgently solved in this field. Summary of the invention

[0007] The invention provides a method for returning Eupatorium sparsely flowered to the wild. The method can improve the waterlogging and scouring resistance of Eupatorium sparsely flowered to the wild, as well as the survival rate and preservation rate of Eupatorium sparsely flowered to the wild.

[0008] The invention provides a field regression method of Echinops sparsely flowered, comprising: taking a sandy river beach as a regression point to re-plant Echinops sparsely flowered plants;

[0009] In the sandy river beach, the flooding time during the flood season is ≤5 months, the annual rainfall is 1000mm~1200mm, the altitude is 40m~150m, the average annual temperature is 17~19℃, the annual minimum temperature is ≥-9℃, and the annual maximum temperature is ≤42℃.

[0010] The field regression method as described above, wherein the regression planting method includes at least one of a weed-proof cloth soil protection planting method, a non-woven bag removal planting method, and a non-woven bag planting method.

[0011] The field reintroduction method as described above, wherein the Echinops sparsely flowered plants are obtained by acclimating and cultivating Echinops sparsely flowered potted seedlings;

[0012] The sparse-flowered water calendula seedlings include at least one of the one-year-old sparse-flowered water calendula seedlings, the two-year-old sparse-flowered water calendula seedlings, and the three-year-old sparse-flowered water calendula seedlings.

[0013] The field return method as described above, wherein the acclimation culture comprises: growing the Echinops sparsely flowered potted seedlings in the shade shed at the return point for 2 months to obtain the Echinops sparsely flowered plants, wherein the Echinops sparsely flowered plants are watered 2 to 3 times a week in the first month and 1 to 2 times a week in the second month;

[0014] Performing a first disinfection treatment on the roots of the Eupatorium sparsely flowered potted seedlings 2 to 3 times during their growth;

[0015] The first disinfection treatment includes: using 50% carbendazim wettable powder solution (1 g dissolved in 600 mL of water) to irrigate the roots of the Eupatorium sparsely flowered potted seedlings.

[0016] The field regression method as described above, wherein, before the regression planting, the ecological environment of the regression point is optimized, including:

[0017] a. Clearing other vegetation at the regression point;

[0018] b. Leveling the terrain and performing a second disinfection treatment on the soil at the regression point;

[0019] c. Set up a retaining wall on the water-facing side of the regression point.

[0020] In the field regression method as described above, the leveling of the terrain and the second disinfection of the soil at the regression point include:

[0021] Sprinkle 20 g of 50% carbendazim wettable powder per square meter at the return point and till the soil.

[0022] In the field regression method as described above, setting a retaining wall on the water-facing surface of the regression point includes: setting a retaining wall with a height of 50-60 cm and a width of 15-20 cm on the water-facing surface of the regression point.

[0023] The field regression method as described above, wherein the regression planting includes: placing the sparse-flowered water cypress plant into the planting hole at the regression point in March to April each year, covering with 10 to 12 cm thick pebbles, filling the gaps with river sand and compacting, covering the topsoil until it is level with the ground, stepping on it tightly, and then surrounding the seedlings with large pebbles, and watering thoroughly after planting.

[0024] The field reintroduction method as described above, wherein, after the reintroduction planting, the method further comprises maintaining the Echinops sparsely flowered plants, wherein the maintenance comprises:

[0025] In the first month after returning to planting, use ABT3 rooting powder solution to irrigate the roots every week to promote the rooting of the sparse flowered cypress plant, and spray 100-150 mg / L gibberellin growth solution once a week; and / or,

[0026] During the first two months after replanting, check the survival of the plants weekly and water them according to soil moisture, with the amount of watering being based on thorough watering; and / or,

[0027] When the Eupatorium sparsely flowered plants experience the first flood period, support the seedlings and add soil after the water recedes, and spray them with 0.3wt%~0.5wt% urea solution and 0.2wt%~0.3wt% potassium dihydrogen phosphate solution 2~3 times in the first month after the water recedes, with each spraying amount of 150~300mL per plant.

[0028] The field return method as described above, wherein, further comprises monitoring the Echinops sparsely flowered plants, wherein the monitoring comprises:

[0029] The survival rate of the plants of P. sparsely flowered was investigated in May and June, and the preservation rate of the plants of P. sparsely flowered was investigated in October;

[0030] The survival rate, plant height and base diameter of the sparse-flowered water cypress plants were investigated in March and April of the second year after restoration.

[0031] The present invention uses the above-mentioned field regression method to achieve the field regression of Eupatorium sparsely flowered, and improves its survival rate and preservation rate in the field regression. The field regression method has the advantages of simple operation, low cost, high efficiency and rapidity. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Returning artificially bred water chestnuts to the wild is a necessary choice for expanding the wild population of water chestnuts. However, the arrival of the summer rainy season and the flood discharge of the Three Gorges Dam and the Gezhouba Dam have caused the water level of the Yangtze River to rise, and the scouring force of the water flow has increased, resulting in a significant decrease in the survival rate and preservation rate of water chestnuts returned to the wild. The present invention selects a sandy river beach with annual rainfall, altitude, average annual temperature, annual minimum temperature and annual maximum temperature similar to those of the original distribution area as a return point for returning and planting water chestnuts, thereby realizing the wild return of water chestnuts, improving the water chestnuts' ability to withstand flooding and scouring, and the survival rate and preservation rate of wild return.

[0034] Based on this, the present invention provides a field regression method of Echinops sparsely flowered, comprising: using sandy riverbed as a regression point to regress and plant Echinops sparsely flowered plants;

[0035] Among them, in the sandy riverbed, the flooding time during the flood season is ≤5 months, the annual rainfall is 1000mm~1200mm, the altitude is 40m~150m, the average annual temperature is 17~19℃, the annual minimum temperature is ≥-9℃, and the annual maximum temperature is ≤42℃.

[0036] When the sandy riverbed with conditions similar to those of the native environment of the above-mentioned Eupatorium sparsely flowered can be selected as the regression point, the population distribution range of the Eupatorium sparsely flowered can be expanded, and the survival rate and preservation rate of the Eupatorium sparsely flowered can be improved when it is reintroduced into the wild.

[0037] In the present invention, the method of returning to planting includes at least one of the weed-proof cloth soil protection planting method, the non-woven bag removal planting method, and the non-woven bag planting method, and the weed-proof cloth soil protection planting method is preferred.

[0038] In some embodiments, the Eupatorium sparsely flowered seedlings are domesticated and cultivated to obtain Eupatorium sparsely flowered plants, so that the artificially bred Eupatorium sparsely flowered plants can better adapt to the wild ecological environment, improve the survival and growth abilities of the Eupatorium sparsely flowered plants, and thus improve the survival rate and preservation rate of the Eupatorium sparsely flowered plants returning to the wild.

[0039] Further, the sparse-flowered water cypress seedlings include at least one of one-year-old sparse-flowered water cypress seedlings, two-year-old sparse-flowered water cypress seedlings, and three-year-old sparse-flowered water cypress seedlings, preferably three-year-old sparse-flowered water cypress seedlings. The present invention screens one-year-old sparse-flowered water cypress seedlings (seedling height ≥ 20 cm), two-year-old sparse-flowered water cypress seedlings (seedling height ≥ 25 cm), and three-year-old sparse-flowered water cypress seedlings (seedling height ≥ 35 cm) obtained by cutting propagation. The selected sparse-flowered water cypress seedlings are strong, free of wilting, pests and diseases, and withered, and are all bred in the shade shed of the Yangtze River Rare Plants Research Institute near the dam section of the Three Gorges Dam area.

[0040] In the present invention, the acclimation culture comprises: growing the sparse-flowered cypress seedlings in the shade shed at the return point for 2 months to obtain the sparse-flowered cypress plant, watering 2 to 3 times a week in the first month, and watering 1 to 2 times a week in the second month, so that the sparse-flowered cypress seedlings gradually adapt to the outdoor climate by gradually reducing the watering frequency, and improving the survival ability of the sparse-flowered cypress seedlings. At the same time, during the growth of the sparse-flowered cypress seedlings, the roots of the sparse-flowered cypress seedlings are subjected to a first disinfection treatment 2 to 3 times, which can prevent and control the root diseases of the sparse-flowered cypress seedlings and help the sparse-flowered cypress seedlings grow healthily.

[0041] Furthermore, the first disinfection treatment includes: using 50% carbendazim wettable powder solution (prepared by dissolving 1g of 50% carbendazim wettable powder in 600mL of water) to irrigate the roots of the Eupatorium sparsely flowered water cypress seedlings (pour the 50% carbendazim wettable powder solution directly into the soil and irrigate it thoroughly), which can better prevent and control root diseases of the Eupatorium sparsely flowered water cypress seedlings and promote the healthy growth of the Eupatorium sparsely flowered water cypress seedlings.

[0042] According to the technical solution of the present invention, before the return planting, the ecological environment of the return point is also optimized, including:

[0043] a. Clear other vegetation at the regression point;

[0044] b. Level the terrain and perform a second disinfection on the soil at the return point;

[0045] c. Set up a retaining wall on the water-facing side of the regression point.

[0046] The present invention specifically optimizes the ecological environment of the regression point by: a) clearing other vegetation at the regression point to prevent other vegetation from competing with the water and nutrients of the water cypress plant, thereby ensuring that the water cypress plant can obtain sufficient water and nutrients;

[0047] b) Flat terrain is conducive to the uniform acquisition of water and heat by the water hyacinthus sparse flower plants, so that the water hyacinthus sparse flower plants can grow stably; by performing a second disinfection treatment on the soil at the return point, the pathogens and insect pests in the soil can be eliminated, so that the water hyacinthus sparse flower plants can grow healthily;

[0048] c) Setting up retaining walls on the water-facing side of the return point can reduce the scouring force of water flow on the water cypress plants during flood season and improve the survival rate of the water cypress;

[0049] Furthermore, other vegetation at the return point can be cleared by harvesting and burning.

[0050] The present invention does not limit the material of the retaining wall. Exemplarily, it can be a stone retaining wall.

[0051] In the present invention, leveling the terrain and performing a second disinfection treatment on the soil at the regression point includes: spreading 20g of 50% carbendazim wettable powder per square meter of the regression point and plowing the soil, which can better eliminate pathogens and pests in the soil and further enhance the growth ability of the Eupatorium sparsely flowered.

[0052] In some embodiments, setting a retaining wall on the water-facing surface of the regression point includes: setting a retaining wall with a height of 50-60 cm and a width of 15-20 cm on the water-facing surface of the regression point, which can reduce the scouring force of water flow on the Eupatorium sparsely flowered plants during flood season while saving building materials.

[0053] In some embodiments, the return planting includes: placing the Eupatorium sparsely flowered plants in the planting holes at the return points in March and April each year, covering with 10 cm to 12 cm thick pebbles (with a diameter of 2 cm to 3 cm), filling the gaps with river sand and compacting them, covering the topsoil until it is level with the ground, stepping on it tightly, and then surrounding the seedlings with large pebbles (with a diameter of 8 cm to 16 cm), and watering them thoroughly after planting.

[0054] By covering the planting holes at the return point with a certain thickness of pebbles, compacting it with river sand, and then surrounding the seedlings with large pebbles, the soil can be loosened to maintain good water and air permeability while reducing soil loss at the return planting site after river water erosion, thereby improving the survival rate and preservation rate of the sparse-flowered water cypress returning to the wild.

[0055] According to the technical solution of the present invention, after returning to planting, the plant of Eupatorium sparsely flowered is also managed and maintained, and the management and maintenance includes:

[0056] In the first month after returning to planting, use ABT3 rooting powder solution (dissolve 1g ABT3 rooting powder in 100-150ml 95% ethanol, add 60-80kg water, and shake well) to irrigate the roots every week to promote the rooting of the water cypress plant. Spray 150mg / L gibberellin growth solution once a week to increase the growth rate of the water cypress plant.

[0057] In the first and second months after returning to planting, check the survival of the plants every week and water them according to the soil moisture. The amount of watering should be based on thorough watering.

[0058] When the water chestnut plants experience the first flood period flooding (the first flood period flooding generally refers to June to September each year, and the specific time depends on the annual climate conditions), the seedlings should be supported and the soil should be fertilized in time after the water recedes, and in the first month after the water recedes, 0.3wt%~0.5wt% urea solution (0.3~0.5kg urea is dissolved in 99.7~99.5kg water) and 0.2wt%~0.3wt% potassium dihydrogen phosphate solution (0.2~0.3kg potassium dihydrogen phosphate is dissolved in 99.7~99.5kg water) are sprayed 2~3 times, with each spraying amount of 150~300mL per plant, so that the water chestnut plants after the flooding can replenish the nutrients nitrogen and phosphorus needed for growth in time, promote the growth of the water chestnut plants, and recover as soon as possible.

[0059] The present invention can pay attention to cutting off weeds and shrubs around the water hyacinth plant in the early stage of regression, so that the water hyacinth plant can obtain sufficient water and nutrients. The early stage of regression refers to the period when the water hyacinth plant is not stable after the regression planting. Since a large number of weeds will erupt at the regression point after flooding, it is necessary to manually remove the weeds to ensure the stable growth of the water hyacinth plant. Therefore, the early stage of regression needs to be determined according to the actual growth situation of the water hyacinth plant.

[0060] In some embodiments, the method further includes monitoring the plants of the sparse-flowered water cypress, and the monitoring includes: investigating the survival rate of the sparse-flowered water cypress plants in May and June, and investigating the preservation rate of the sparse-flowered water cypress plants in October;

[0061] Furthermore, the survival rate, plant height and base diameter of the Eupatorium sparsely flowered plants were investigated in March and April of the second year after restoration.

[0062] Hereinafter, the present invention will be further described in detail through specific examples.

[0063] Example 1

[0064] The field regression method of the present embodiment provided by the present invention comprises the following steps:

[0065] 1) A sandy river beach with a lot of sediment deposition (Yanzhiba, Dianjun District, Yichang City (30°63′77″N, 111°33′78″E)) was selected as the regression point. In the sandy river beach, the flooding time during the flood season is 4 to 4.5 months, the annual average rainfall is 1213 mm, the altitude is 45 to 50 m, the annual average temperature is 18.5 °C, the annual minimum temperature is -4 °C, and the annual maximum temperature is 40 °C;

[0066] 2) Grow the one-year-old sparse water cypress seedlings, two-year-old sparse water cypress seedlings, and three-year-old sparse water cypress seedlings (500 sparse water cypress seedlings of each seedling age) propagated by cuttings in the shade shed at the return point for 2 months to obtain one-year sparse water cypress plants, two-year-old sparse water cypress plants, and three-year-old sparse water cypress plants, wherein watering is performed twice a week in the first month and once a week in the second month; during the growth of the sparse water cypress seedlings, the roots of the sparse water cypress seedlings are subjected to the first disinfection treatment twice, and the first disinfection treatment includes: using 50% carbendazim wettable powder solution to irrigate the roots of the sparse water cypress seedlings, and watering thoroughly;

[0067] 3) Clear other vegetation at the return point, level the terrain, and perform a second disinfection on the soil at the return point. Set up a stone retaining wall with a height of 60 cm and a width of 20 cm on the water-facing side of the return point;

[0068] Leveling the terrain and performing a second disinfection treatment on the soil at the return point include: applying 20g of 50% carbendazim wettable powder per square meter of the return point and plowing the soil;

[0069] 4) Dig 40cm×40cm planting holes with a plant spacing of 1.5m×1.5m. In March of each year, remove the non-woven bags of the Eupatorium sparsely flowered plants and place them in the planting holes at the return point. Cover with 10cm thick pebbles, fill the gaps with river sand and compact them. Cover the topsoil until it is level with the ground, step on it tightly, and then surround the seedlings with large pebbles. After planting, water it thoroughly and cover the planting area with degradable weed-proof cloth along the direction of water flow, leaving only the Eupatorium sparsely flowered seedlings exposed. The weed-proof cloth is pressed firmly with sand and ground nails.

[0070] 5) In the early stage of the return, be sure to cut off the weeds and shrubs around the sparse-flowered cypress plants;

[0071] In the first month after returning to planting, use ABT3 rooting powder solution to irrigate the roots every week to promote the rooting of the sparse flowered water cypress plant, and spray 150mg / L gibberellin growth solution once a week, and the amount of each spray should be enough to make all the leaves of the plant wet but not gather into water droplets;

[0072] In the first and second months after returning to planting, check the survival of the plants every week and water them according to the soil moisture. The amount of watering should be based on thorough watering.

[0073] When the sparse flowered water cypress plants experience the first flood period, the seedlings are promptly supported and soiled after the water recedes, and 0.3wt% urea solution and 0.2wt% potassium dihydrogen phosphate solution are sprayed twice in the first month after the water recedes, with each spraying amount of 300mL per plant;

[0074] 6) Investigate the survival rate of Eupatorium sparsely flowered plants in June, and investigate the preservation rate of Eupatorium sparsely flowered plants in October; In March of the second year after the return planting, investigate the survival rate, plant height and base diameter of Eupatorium sparsely flowered plants.

[0075] Example 2

[0076] The field return method of Eupatorium sparsely flowered Thunbergia in this embodiment is basically the same as that in Embodiment 1, except that: Step 4) digs 40cm×40cm planting holes at a plant spacing of 1.5m×1.5m, removes the non-woven bags of Eupatorium sparsely flowered Thunbergia plants and places them in the planting holes at the return points in March of each year, plants are planted straight and supported, covered with topsoil until it is level with the ground, and stepped on tightly to make it firm.

[0077] Example 3

[0078] The field return method of Eupatorium sparse flowered in this embodiment is basically the same as that of Embodiment 1, except that: Step 4) dig 40cm×40cm planting holes at a plant spacing of 1.5m×1.5m, place the Eupatorium sparse flowered together with the non-woven bag into the planting holes in March of each year, cover with 10 cm thick pebbles, fill the gaps with river sand and compact, cover with topsoil until it is flush with the ground, and step on it tightly.

[0079] Comparative Example 1

[0080] The field regression method of Eupatorium sparsely flowered in this comparative example is basically the same as that in Example 1, except that: a gravel river beach with less sediment deposition on Yanzhiba in Dianjun District, Yichang City described in Example 1 is selected as the regression point.

[0081] Comparative Example 2

[0082] The field regression method of Eupatorium sparsely flowered in this comparative example is basically the same as that in Example 2, except that: a gravel river beach with less sediment deposition on Yanzhiba in Dianjun District, Yichang City described in Example 1 is selected as the regression point.

[0083] Comparative Example 3

[0084] The field regression method of Eupatorium sparsely flowered in this comparative example is basically the same as that in Example 3, except that: a gravel river beach with less sediment deposition on Yanzhiba in Dianjun District, Yichang City described in Example 1 was selected as the regression point.

[0085] Before returning to the wild, the average plant height and average base diameter of the one-year-old Eupatorium sparsely flowered seedlings in pots, the two-year-old Eupatorium sparsely flowered seedlings in pots, and the three-year-old Eupatorium sparsely flowered seedlings in pots are shown in Table 1.

[0086] Table 1

[0087]

[0088] In May and June (1 to 2 months after the return of the sparse flowered water cypress branches to the wild), the survival rate of the sparse flowered water cypress branches in each embodiment and the comparative example was counted, and the survival rate = the number of surviving plants / the number of experimental planting plants × 100%, and the results are shown in Table 2;

[0089] In October (after the return of the Echinops sparsely flowered wild plants to the wild and experienced flooding during the flood season), the survival rates of the Echinops sparsely flowered plants in each embodiment and comparative example were counted, and the survival rate = the number of preserved plants / the number of experimental planted plants × 100%. The results are shown in Table 2.

[0090] Table 2

[0091]

[0092] From the analysis of Table 2, it can be seen that after 1 to 2 months of returning to the wild, the Eupatorium sparsely flowered plants in the embodiment and the comparative example both showed a high survival rate. However, after experiencing flooding during the flood season, the survival rate of the Eupatorium sparsely flowered plants in the embodiment was much higher than the survival rate of the Eupatorium sparsely flowered plants in the comparative example, indicating that the field return method of the present invention enables the Eupatorium sparsely flowered to have excellent resistance to flooding and scouring, and the Eupatorium sparsely flowered to have successfully adapted to the wild environment.

[0093] Moreover, it can be seen from Examples 1 to 3 that the survival rate and preservation rate of the sparse-flowered Eupatorium branches obtained by the weed-proof cloth soil-protected planting method are higher than those of the sparse-flowered Eupatorium branches obtained by the non-woven bag planting method and the sparse-flowered Eupatorium branches obtained by the non-woven bag planting method.

[0094] The survival rate, average plant height and average base diameter of the Echinops sparsely flowered plants in each embodiment and comparative example were statistically analyzed in March and April of the second year of the return planting. The results are shown in Table 3.

[0095] Table 3

[0096]

[0097] Analysis of Table 3 shows that after one growth cycle, the Eupatorium sparse flower plants in Examples 1 to 3 have a higher survival rate, and the average plant height and average base diameter of the Eupatorium sparse flower plants have increased slightly. From the comparison of seedling age, the survival rate and preservation rate of the three-year-old Eupatorium sparse flower plants are higher than those of the one-year-old Eupatorium sparse flower plants and the two-year-old Eupatorium sparse flower plants.

[0098] SPSS20.0 was used to process and analyze the experimental data, and the Duncan multiple comparison method was used to conduct variance analysis on the survival rate and preservation rate of three-year-old Eupatorium sparsely flowered plants that returned to the wild under different site conditions (i.e., sandy riverbed and gravel riverbed) and planting methods (i.e., weed-proof cloth soil protection planting method, non-woven bag removal planting method, and non-woven bag planting method). The results are shown in Table 4.

[0099] Table 4

[0100]

[0101] Analysis of Table 4 shows that the site conditions had no significant effect on the survival rate (P>0.05), but had a very significant effect on the preservation rate (P<0.01). The planting method had no significant effect on the survival rate and preservation rate of the field return of Eupatorium sparsely flowered (P>0.05). The F value shows that the effect of the planting method on the survival rate is greater than that of the site conditions, while the effect of the site conditions on the preservation rate is greater than that of the planting method on the preservation rate.

[0102] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for field restoration of sparsely flowered water cypress branches, characterized in that: include: The sandy river beach was used as the return point to plant the sparsely flowered water cypress plants; In the sandy river beach, the flooding time during the flood season is ≤5 months, the annual rainfall is 1000mm~1200mm, the altitude is 40m~150m, the average annual temperature is 17~19℃, the annual minimum temperature is ≥-9℃, and the annual maximum temperature is ≤42℃.

2. The field regression method according to claim 1, characterized in that: The method of returning to planting includes at least one of a weed-proof cloth soil-protecting planting method, a non-woven bag removal planting method, and a non-woven bag planting method.

3. The field regression method according to claim 1 or 2, characterized in that: The Echinops sparsely flowered cypress plant is obtained by acclimatizing and cultivating Echinops sparsely flowered cypress seedlings in pots; The sparse-flowered water calendula seedlings include at least one of the one-year-old sparse-flowered water calendula seedlings, the two-year-old sparse-flowered water calendula seedlings, and the three-year-old sparse-flowered water calendula seedlings.

4. The field regression method according to claim 3, characterized in that: The acclimation culture comprises: growing the Echinops sparsely flowered pot seedlings in the shade shed at the return point for 2 months to obtain the Echinops sparsely flowered plants, wherein the plants are watered 2 to 3 times a week in the first month and 1 to 2 times a week in the second month; Performing a first disinfection treatment on the roots of the Eupatorium sparsely flowered potted seedlings 2 to 3 times during their growth; The first disinfection treatment includes: using 50% carbendazim wettable powder solution to irrigate the roots of the Eupatorium sparsely flowered potted seedlings.

5. The field regression method according to any one of claims 1 to 4, characterized in that: Before the return planting, the ecological environment of the return point is optimized, including: a. Clearing other vegetation at the regression point; b. Leveling the terrain and performing a second disinfection treatment on the soil at the regression point; c. Set up a retaining wall on the water-facing side of the regression point.

6. The field regression method according to claim 5, characterized in that: The leveling of the terrain and the second disinfection of the soil at the regression point include: Sprinkle 20 g of 50% carbendazim wettable powder per square meter at the return point and till the soil.

7. The field regression method according to claim 5, characterized in that: Setting a retaining wall on the water-facing surface of the regression point includes: setting a retaining wall with a height of 50cm-60cm and a width of 15cm-20cm on the water-facing surface of the regression point.

8. The field regression method according to any one of claims 1 to 7, characterized in that: The return planting includes: placing the Eupatorium sparsely floweredii plants into the planting holes at the return points in March and April each year, covering with 10cm to 12cm thick pebbles, filling the gaps with river sand and compacting them, covering the topsoil until it is level with the ground, stepping on it tightly, and then surrounding the seedlings with large pebbles, and watering them thoroughly after planting.

9. The field regression method according to any one of claims 1 to 8, characterized in that: After the returning to planting, the method further includes maintaining the Echinops sparsely flowered plants, and the maintenance includes: In the first month after returning to planting, the roots are irrigated with ABT3 rooting powder solution once a week to promote the rooting of the sparse flowered cypress plant, and 100mg / L~150mg / L gibberellin growth solution is sprayed once a week; and / or, During the first two months after replanting, check the survival of the plants weekly and water them according to soil moisture, with the amount of watering being based on thorough watering; and / or, When the Eupatorium sparsely flowered plants experience the first flood period, support the seedlings and add soil after the water recedes, and spray them with 0.3wt%~0.5wt% urea solution and 0.2wt%~0.3wt% potassium dihydrogen phosphate solution 2~3 times in the first month after the water recedes, with each spraying amount of 150~300mL per plant.

10. The field regression method according to claims 1-9, characterized in that: The method also includes monitoring the Echinops sparsely flowered plants, wherein the monitoring includes: The survival rate of the plants of P. sparsely flowered was investigated in May and June, and the preservation rate of the plants of P. sparsely flowered was investigated in October; The survival rate, plant height and base diameter of the sparse-flowered water cypress plants were investigated in March and April of the second year after restoration.

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