Method for promoting renewal of declined shrub forest

Abstract

The invention provides a method for promoting renewal of a declined shrub forest, and belongs to the technical field of ecological environment restoration, and the method comprises the following steps: determining the number, density and distribution mode of renewed shrub forests according to natural endowment of water resources and a natural shrub distribution mode, and renewing flexible branch shrubs by adopting layering; a layering auxiliary rooting device, a matrix and a rooting promoting agent are prepared, the layering auxiliary rooting device is provided with a closed rooting cavity and a water collector connected with the rooting cavity, and the rooting cavity is filled with the matrix; the lower end of the layering rooting assisting device is installed in the pit, the layering is coated with a rooting promoting agent, and the layering is operated to penetrate into the rooting cavity; the conditions of substrate wetting and layering rooting are checked, and water is supplemented into a rooting cavity; after root systems on the pressing strips grow into the rooting cavities, the pressing strips are cut off to form independent plants. According to the method for promoting renewal of the declined shrub forest, the rooting speed in the ecological environment restoration process is increased, and meanwhile water replenishing operation can be completed rapidly and conveniently.

Description

Technical Field

[0001] The invention belongs to the technical field of ecological environment restoration, and more specifically, relates to a method for promoting the regeneration of declining shrub forests. Background Art

[0002] In harsh habitats with dry or cold climates that are not suitable for the growth of trees, some shrubs can adapt well to these extreme conditions and survive, so the distribution of shrub forests is common in these areas. Shrub forests play an important role in ecological functions and economic benefits. Shrubs can be used as high-quality feed and fertilizers, raw materials for artificial boards and pulp, and medicinal materials. In low-altitude areas, shrubs mostly live in harsh habitats with drought, barrenness, and high surface temperatures. Due to environmental stress (harsh climate, nutrient consumption around the root system), excessive human interference (frequent harvesting and utilization), or physiological decline (aging of root piles), some shrubs have difficulty in seed germination and growth in harsh habitats. Therefore, effective human measures are needed to maintain the sustainable development of shrub forests. The current propagation technology has the advantages of high survival rate and simple operation, but its disadvantages are slow rooting and difficulty in water replenishment, which cannot meet the restoration needs of declining shrub forests. Summary of the invention

[0003] The purpose of the present invention is to provide a method for promoting the regeneration of declining shrub forests, so as to solve the technical problems of slow rooting and difficulty in water replenishment in the process of ecological environment restoration in the prior art.

[0004] To achieve the above object, the technical solution adopted by the present invention is: to provide a method for promoting the regeneration of declining shrub forests, comprising:

[0005] S1: The number, density and distribution of regenerated shrubs are determined based on water resources and natural shrub distribution patterns, and flexible branch shrubs are regenerated by layering;

[0006] S2: preparing a layering auxiliary rooting device, a substrate and a rooting promoting agent, wherein the layering auxiliary rooting device has a closed rooting chamber and a water collector connected to the rooting chamber, and the substrate is filled in the rooting chamber;

[0007] S3: Arrange the open space between the bushes and dig a pit, install the lower end of the layering auxiliary rooting device in the pit; ring cut the end of the layering to remove the cortex and apply a rooting agent, and operate the layering to penetrate into the rooting cavity;

[0008] S4: regularly checking the moisture condition of the substrate in the rooting chamber and the rooting condition of the layering strips, and replenishing water into the rooting chamber through the water collector;

[0009] S5: After the roots on the layering strip grow into the rooting cavity, the layering strip auxiliary rooting device is removed and the layering strip is cut off to form an independent plant.

[0010] In a possible implementation, in step S2, the layering assisted rooting device also includes a root guide tube, a rooting shell, and a water guide tube; the root guide tube is arranged vertically and fixedly installed in a pit; the root guide tube is filled with a matrix; the rooting shell and the root guide tube are the rooting cavity, and are fixedly installed on the root guide tube; the rooting shell is provided with mounting holes arranged along the vertical direction and connecting holes arranged along the horizontal direction; the layering is passed through the connecting hole; the water guide tube passes through the mounting hole and is located in the rooting shell and the root guide tube, and the wall of the water guide tube is provided with a water seepage hole connected to the rooting shell and the root guide tube; the water collector is fixedly installed at the upper end of the water guide tube.

[0011] In a possible implementation, the rooting shell includes two half shells that are fixedly connected to each other, the half shells are provided with two symmetrically arranged grooves, the two half shells are connected to each other, and the four grooves are connected to each other in pairs to form the connection hole.

[0012] In a possible implementation, the water collector is a funnel, and the radial dimensions of the upper end of the water collector, the radial dimensions of the rooting shell, and the radial dimensions of the root guide tube decrease successively; the funnel is made of an opaque material and is used to shield the rooting shell from sunlight; the rooting shell and the root guide tube are both made of transparent materials and are used to observe the condition of the substrate and the growth of the layered roots.

[0013] In a possible implementation, in step S3, a soil column is dug in the pit to form a receiving groove, and the rhizomes on the side walls of the receiving groove are cut off; the root guide tube is installed in the receiving groove, and the soil around the root guide tube is compacted.

[0014] In a possible implementation, in step S1, the regeneration density is designed according to the annual precipitation. In areas with annual precipitation < 200 mm, the shrub regeneration density is ≤ 600 bushes / hm2. 2 ; In areas with annual precipitation of 200 mm or less and annual precipitation of less than 400 mm, the shrub regeneration density shall be ≤ 1500 bushes / hm2 2 ; In areas with annual precipitation ≥ 400 mm, the shrub regeneration density is ≥ 2500 bushes / hm2 2 .

[0015] In a possible implementation, in step S3, two to three years old and 100-150 cm long lignified and flexible branches are selected as the layering strips; the layering strips are pulled down to the ground, and the pit is a circular area centered on the ring cut of the layering strip; and an extrusion piece is arranged to act on the layering strip to extrude and fix the layering strip.

[0016] In a possible implementation, in step S2, the matrix includes vermiculite, decomposed organic matter, perlite and compound fertilizer, wherein the volume ratio of the vermiculite, the decomposed organic matter and the perlite is 2:1:2, and the compound fertilizer accounts for 2% of the total mass of the matrix; the root-promoting agent includes 400 ppm of sodium indolebutyrate and talcum powder used to prepare the sodium indolebutyrate into a viscous state.

[0017] In a possible implementation, step S1 also includes renewing hard-branch shrubs by seed sowing; the seed sowing method requires pretreatment of the seeds to be sown, including germination and seed soaking; the seeds used for seed sowing are added to the rooting cavity, and the seedlings of the seed-soaked seeds grow and pass through the rooting cavity and continue to be cultivated to achieve shrub forest renewal.

[0018] In a possible implementation, the rooting cavity into which the layering strip penetrates and the rooting cavity into which seeds are added are sealed.

[0019] The beneficial effect of the method for promoting the renewal of declining shrub forests provided by the present invention is that: compared with the prior art, the method for promoting the renewal of declining shrub forests of the present invention determines the renewal density and layout by evaluating the water resource endowment and the natural shrub distribution pattern in the early stage, and avoids water resource competition or ecological imbalance caused by blind planting; the closed rooting chamber and customized matrix of the layering auxiliary rooting device are suitable for the microenvironment of root development, which is particularly suitable for the recovery needs of fragile ecosystems in arid / semi-arid areas, and the water collector collects rainwater and dew or manually operates to quickly and conveniently replenish water into the rooting chamber to ensure that the layering takes root quickly. Finally, the rooting of the layering is regularly checked and the rooting layering is cut off after rooting to form an independent plant for cultivation. When the independent plant can play an ecological function to maintain the stability of the habitat, the surrounding declining shrubs can be removed to achieve the renewal of the shrubs. In this way, the rooting speed in the process of ecological environment restoration is improved, and the water replenishment operation can be completed quickly and conveniently. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0021] Figure 1 A schematic diagram of a method for promoting the regeneration of declining shrub forests provided by an embodiment of the present invention;

[0022] Figure 2 A schematic diagram of the structure of a root growth auxiliary device provided in an embodiment of the present invention;

[0023] Figure 3 An exploded view of a root growth assisting device provided by an embodiment of the present invention;

[0024] Figure 4 A schematic diagram of the use status of the root growth auxiliary device provided in an embodiment of the present invention.

[0025] Among them, the reference numerals in the figure are:

[0026] 10. Root guide tube; 20. Rooting shell; 21. Mounting hole; 22. Connection hole; 23. Half shell; 24. Groove; 25. Connector; 26. Limit cylinder; 30. Water guide tube; 31. Seepage hole; 40. Water collector; 41. Water inlet; 42. Water outlet; 50. Pressure strip; 51. Pit. DETAILED DESCRIPTION

[0027] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0028] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0029] It should be understood that the orientation or position relationship indicated by terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0031] See also Figures 1 to 4, the method for promoting the renewal of declining shrub forests provided by the present invention is now described. A method for promoting the renewal of declining shrub forests, comprising S1: determining the number, density and distribution of renewed shrub forests based on water resource endowment and natural shrub distribution pattern, and renewing flexible branch shrubs by layering 50; S2: preparing a layering auxiliary rooting device, a matrix and a rooting promoting agent, the layering auxiliary rooting device having a closed rooting cavity and a water collector 40 connected to the rooting cavity, and filling the rooting cavity with a matrix; S3: arranging the open space between the shrubs, and digging to form a pit 51, and installing the lower end of the layering auxiliary rooting device in the pit 51; The end of the layering strip 50 is ring-cut to remove the cortex and a rooting-promoting agent is applied, and the layering strip 50 is operated to penetrate into the rooting cavity; the seeds used for seed sowing are added into the rooting cavity; S4: the moisture condition of the substrate in the rooting cavity and the rooting condition of the layering strip are regularly checked, and water is added to the rooting cavity through the water collector 40; S5: after the roots on the layering strip 50 grow into the rooting cavity, the layering strip auxiliary rooting device is removed and the layering strip 50 is cut off to form an independent plant; the seedlings of the seed sowing seeds grow and penetrate through the rooting cavity and continue to be cultivated, and the independent plants are cultivated to achieve shrub forest renewal.

[0032] Compared with the prior art, the method for promoting the renewal of declining shrub forests provided by the present invention determines the renewal density and layout by evaluating the water resource endowment and the distribution pattern of natural shrubs in the early stage, thereby avoiding water resource competition or ecological imbalance caused by blind planting; the closed rooting chamber and customized matrix of the layering auxiliary rooting device are suitable for the microenvironment of root development, which is particularly suitable for the recovery needs of fragile ecosystems in arid / semi-arid areas, and the water collector 40 collects rainwater and dew or replenishes water into the rooting chamber quickly and conveniently through manual operation to ensure that the layering 50 takes root quickly. Finally, the rooting of the layering 50 is checked regularly and the rooting layering is cut off after rooting to form an independent plant for cultivation. When the independent plant can play an ecological function to maintain the stability of the habitat, the surrounding declining shrubs can be removed to achieve the renewal of the shrubs. In this way, the rooting speed in the process of ecological environment restoration is improved, and the water replenishment operation can be completed quickly and conveniently.

[0033] When cultivating independent plants, strengthen fertilizer and water management to promote the growth of independent plants; when the new plants can play an ecological role in maintaining a stable habitat, the surrounding declining shrubs can be removed to achieve the renewal of shrubs; the branches and leaves of declining shrubs can be used to cover the ground to improve the surface microhabitat and increase soil fertility. It is suitable for the renewal of shrubs with flexible branches such as lilac, Amorpha fruticosa, Forsythia suspensa, Caragana korshinskii, Salix chinensis, Lycium barbarum, Red Ramulus, Salix psammophila, etc.

[0034] See also Figures 1 to 4As a specific embodiment of the method for promoting the regeneration of declining shrub forests provided by the present invention, in step S2, the layering auxiliary rooting device also includes a root guide tube 10, a rooting shell 20, and a water guide tube 30; the root guide tube 10 is arranged vertically and fixedly installed in the pit 51; the root guide tube 10 is filled with a matrix; the rooting shell 20 and the root guide tube 10 are inside a rooting cavity and are fixedly installed on the root guide tube 10; the rooting shell 20 is provided with a mounting hole 21 arranged through in the vertical direction and a connecting hole 22 arranged through in the horizontal direction; the layering strip 50 is inserted into the connecting hole 22; the water guide tube 30 penetrates the mounting hole 21 and is located in the rooting shell 20 and the root guide tube 10, and a water seepage hole 31 connected to the rooting shell 20 and the root guide tube 10 is provided on the tube wall of the water guide tube 30; the water collector 40 is fixedly installed on the water guide tube 30 The upper end of the root guide tube 10; when in use, fill the matrix in the root guide tube 10, and install the root guide tube 10 in the pit; fill the matrix inside the rooting shell, and pass the layering strip 50 through the connecting hole 22 and enter the inside of the rooting shell 20, and then install the lower end of the rooting shell 20 on the root guide tube 10, and then pass the water pipe 30 from top to bottom through the mounting hole 21 and enter the rooting shell 20 and the root guide tube 10, and make the water seepage holes 31 on the water pipe 30 correspond to the rooting shell 20 and the root guide tube 10 respectively; finally, fix the water collector 40 on the upper end of the water pipe 30; during the rooting process, the layering strip 50 provides nutrients for the growth of the root system with the help of the matrix, and the water collector 40 gathers precipitation or artificial irrigation, and the operation is quick and simple, so that the water flows through the water pipe 30 and the seepage holes 31 and enters the matrix, thereby inducing the root system to grow faster.

[0035] Specifically, a soil column is dug out at the bottom of the pit 51 and the root guide tube 10 is installed, and then the soil outside the root guide tube 10 is compacted. The matrix in the rooting shell 20 and the root guide tube 10 is relatively moist. Before installing the layering strip 50, the cortex of 1-2 cm is ring-peeled at the rooting position in the upper part of the layering strip 50 (to avoid damaging the xylem), and a layer of rooting-promoting agent is applied. The matrix in the rooting shell 20 provides a good environment for plant rooting, and the seepage holes 31 of the water pipe 30 can allow water to slowly penetrate into the matrix of the rooting shell 20 and the root guide tube 10, ensuring uniform distribution of water and meeting the water demand of the plant in the early stage of growth. The water inlet 41 of the water collector 40 can collect rainwater or other external water sources, and transport the water to the water pipe 30 through the water outlet 42. The lower end of the rooting shell 20 is provided with a limiting cylinder 26 arranged around the lower opening of the mounting hole 21. The aperture of the lower opening of the mounting hole 21 is consistent with the inner diameter of the root guide tube 10, and the upper end of the root guide tube 10 is installed in the limiting cylinder 26; when the rooting shell 20 is installed on the upper end of the root guide tube 10, the upper end of the root guide tube 10 is installed in the limiting cylinder 26, and the outer wall of the root guide tube 10 is tightly fitted with the inner wall of the limiting cylinder 26 to ensure the stability of the installation. The height of the limiting cylinder 26 is set to provide good support and positioning for the root guide tube 10 to prevent it from shaking or shifting during use. There are also some tiny protrusions on the inner wall of the limiting cylinder 26, which can further increase the friction between the limiting cylinder 26 and the root guide tube 10, thereby enhancing the firmness of the connection between the two.

[0036] See also Figures 1 to 4 As a specific embodiment of the method for promoting the regeneration of declining shrub forests provided by the present invention, the rooting shell 20 includes two half shells 23 that are fixedly connected to each other. Two symmetrically arranged grooves 24 are provided on the half shells 23. The two half shells 23 are connected, and the four grooves 24 are connected in pairs to form a connecting hole 22; the shape of each groove 24 is semicircular, and its radius is adapted to the radius of the connecting hole 22 to be formed. When the half shells 23 are connected, the staff needs to ensure that the four grooves 24 are accurately connected, which can be achieved with the help of auxiliary tools such as positioning pins. First, insert the positioning pin into the preset positioning hole on the half shell 23 to preliminarily position the two half shells 23, and then firmly fix the two half shells 23 together through other connecting parts. Through this structure, the pressure strip 50 is first installed on one half shell 23, and then the other half shell 23 is connected and installed on the other half shell 23 from top to bottom. The two half shells 23 are also provided with a plurality of mutually connected clips 25, which are located between adjacent grooves 24; the plurality of clips 25 are respectively installed between two adjacent grooves 24 to avoid interference with the connection holes 22, and the connection between the two half shells 23 is more stable and secure by means of the plurality of clips 25. The two matching clips 25 are respectively in a buckle shape and a slot matching the buckle shape.

[0037] See also Figures 1 to 4 As a specific implementation of the method for promoting the renewal of declining shrub forests provided by the present invention, the water collector 40 is a funnel, and the radial size of the upper end of the water collector 40, the radial size of the rooting shell 20, and the radial size of the rooting tube 10 are reduced in sequence; the funnel is made of opaque material, used to block sunlight for the rooting shell 20; the rooting shell 20 and the rooting tube 10 are both made of transparent material, used to observe the substrate condition and the growth of the layered root system; the funnel is used as a water collector 40, and its large mouth faces upward as a water inlet 41, which can effectively collect water from a large area, whether it is rainwater or other liquid water sources, it can be quickly gathered inside the funnel. The small mouth is used as a water outlet 42, which is convenient for guiding the collected water into the water guide 30; through this method of gradually reducing the radial size from top to bottom, the funnel can produce a certain sunshade effect, which can reduce the temperature to reduce evaporation, so that the temperature and humidity in the rooting shell 20 are kept in a relatively stable state. The rooting shell 20 and the root guide tube 10 are both made of transparent materials, which is convenient for the staff to observe the substrate condition and the root growth of the layering strip 50 and to take corresponding management measures.

[0038] Preferably, in step S3, a soil column is dug in the pit 51 to form a receiving groove, and the roots on the side wall of the receiving groove are cut off; the root guide tube 10 is installed in the receiving groove, and the soil around the root guide tube 10 is compacted; before digging the soil column, a soil column shovel needs to be prepared. The soil column shovel is made by cutting and welding a rigid metal pipe. The upper welded handle can be rotated to press the shovel wall to dig the soil column. The shovel wall is 21 cm high. A 1-2 cm wide vertical slit is opened on the metal pipe to facilitate the removal of the soil column. The lower part of the metal pipe is a cutting edge to facilitate cutting of fine roots in the soil. A horizontally arranged handle is provided on the metal pipe, and a plurality of supporting ribs are provided between the handle and the metal pipe.

[0039] See also Figure 1 As a specific implementation of the method for promoting the regeneration of declining shrub forests provided by the present invention, in step S1, the regeneration density is designed according to the annual precipitation. In areas with annual precipitation < 200 mm, the shrub regeneration density is ≤ 600 bushes / hm2. 2 ; In areas with annual precipitation of 200 mm or less and annual precipitation of less than 400 mm, the shrub regeneration density shall be ≤ 1500 bushes / hm2 2 ; In areas with annual precipitation ≥ 400 mm, the shrub regeneration density is ≥ 2500 bushes / hm2 2 ; By designing the renewal density according to the annual precipitation, it has a good effect in vegetation restoration and ecological construction. For example, in arid areas, the annual precipitation is less than 200mm, due to the extreme scarcity of water resources, the shrub renewal density is low, that is, ≤600 bushes / hm 2, which can ensure that each bush has a relatively sufficient water supply and avoid the situation where over-planting causes large-scale vegetation death due to water competition. In areas with annual precipitation of 200 mm or less and less than 400 mm, the density of shrub renewal should be limited to ≤1500 bushes / hm2. 2 , which enables shrubs to grow better under relatively limited precipitation conditions, ensuring both the gradual increase in vegetation coverage and their survival rate under existing precipitation conditions. For areas with annual precipitation ≥ 400 mm, a higher shrub regeneration density ≥ 2500 bushes / hm2 2 We can make full use of the relatively abundant precipitation resources and quickly increase vegetation coverage, thereby achieving multiple ecological functions such as improving the ecological environment, reducing soil erosion, and regulating the local climate.

[0040] See also Figure 1 As a specific implementation of the method for promoting the regeneration of declining shrub forests provided by the present invention, in step S3, two to three years old and 100-150 cm long lignified and flexible branches are selected as layering strips; the layering strips are pulled down to the ground, and the pit is a circular area centered on the layering strip ring cut; an extrusion piece is arranged to act on the layering strip to extrude and fix the layering strip; by selecting a specific layering strip, the layering strip can take root more smoothly and quickly, and the rooting will not be affected by the layering strip's own problems. When arranging the extrusion piece, ensure that the pressure it applies is moderate, so that it can firmly extrude and fix the layering strip to prevent it from loosening and shifting in the subsequent process, and will not cause damage to the layering strip due to excessive pressure. The extrusion piece can be made of a material with a certain elasticity and toughness, such as a special rubber clamp or a soft plastic clamp. New shoots sprouting from the bushes can be used as layering strips, and when the new shoots grow to 20-30cm, 2 to 4 shoots can be retained for cultivation for later use; or stronger branches can be selected and medium or short pruning measures can be used to promote the growth of new shoots for cultivation. Usually 1 / 3 to 1 / 2 of the branches are cut off, leaving full buds under the cut. This method will promote the growth of stronger branches from lateral buds, with high branching ability and strong growth potential.

[0041] See also Figure 1As a specific embodiment of the method for promoting the regeneration of declining shrub forests provided by the present invention, in step S2, the matrix includes vermiculite, decomposed organic matter, perlite and compound fertilizer, wherein the volume ratio of vermiculite, decomposed organic matter and perlite is 2:1:2, and the compound fertilizer accounts for 2% of the total mass of the matrix; the root-promoting agent includes 400ppm of sodium indolebutyrate and talcum powder used to prepare sodium indolebutyrate to a viscous state; the main components of the matrix include vermiculite, decomposed organic matter, perlite and compound fertilizer, and the vermiculite, decomposed organic matter, perlite and compound fertilizer are mixed and stirred evenly according to a specific proportion, wherein the volume ratio of vermiculite, decomposed organic matter and perlite is 2:1:2, and the compound fertilizer accounts for 2% of the total mass of the matrix. Through the matrix of this composition, with the help of vermiculite and perlite having good air permeability and water retention, combined with nutrients provided by decomposed organic matter. The compound fertilizer is 15-15-15 compound fertilizer, and the decomposed organic matter is crushed straw and other agricultural and forestry waste organic matter. As for the root-promoting agent, a certain amount of sodium indolebutyrate is first diluted with water to 400ppm, and an appropriate amount of talcum powder is used to prepare a 400ppm sodium indolebutyrate aqueous solution until it is slightly viscous for use; the use of this ingredient of the root-promoting agent can promote the rooting of the layering faster. During the whole process, it is necessary to pay attention to maintaining the moisture of the substrate. After implementation, the layering grew normally, with a rooting rate of more than 85%, achieving greening in the same year, and forming independent plants in the second year. The number of watering times was reduced by more than 30%, the amount of fertilizer used was reduced by 20%, and the cost was reduced by more than 50%; in addition, the roots of the shrubs grew downward, which improved the drought resistance and soil stabilization function, and the number of surface insects increased.

[0042] See also Figure 1As a specific embodiment of the method for promoting the renewal of declining shrub forests provided by the present invention, in step S1, it also includes renewing hard-branch shrubs by seed sowing; the seed sowing method requires pretreatment of the seeds to be sown, including germination and seed soaking; the seeds used for seed sowing are added to the rooting cavity, and the seedlings of the seed sown seeds grow and pass through the rooting cavity and continue to be cultivated to achieve the renewal of the shrub forest; first, the hard-branch shrubs are renewed by seed sowing, thereby increasing the coverage of the method for promoting the renewal of declining shrub forests and improving the ecological function recovery effect of the shrub forest. Specifically, the seeds to be sown are pretreated first, and native tree species with rapid germination, fast seedling growth rate, strong adaptability and resistance, abundant seed sources and low price are selected. The seeds are pretreated, including (1) germination: deep dormant seeds sown in spring should be germinated in advance so that the seedlings can be unearthed neatly in the same year and can be fully lignified before the end of autumn to achieve the purpose of safe wintering. (2) Seed soaking: forced dormant seeds sown in spring are soaked to promote the seedlings to be unearthed neatly as soon as possible. Then, the seed sowing seeds are added to the rooting cavity of the layering auxiliary rooting device, and grow with the help of the matrix in the rooting cavity. Finally, the fertilizer and water management is strengthened to promote growth. After the plants grow for 1 to 2 years, the declining shrubs can be removed to achieve shrub replacement and renewal. It is suitable for the renewal of hard branch shrubs such as sour jujube, tamarisk, hairy hazel, tiger hazel, vitex, sea buckthorn, etc.

[0043] See also Figure 1 As a specific implementation of the method for promoting the regeneration of declining shrub forests provided by the present invention, the rooting cavity into which the layering strips are inserted and the rooting cavity into which seeds are added are sealed; the layering strip auxiliary rooting device is sealed, especially the connection holes on the rooting shell are sealed, which can effectively prevent foreign substances from entering the rooting cavity, thereby creating a relatively stable and clean internal environment for rooting. In some environments with high humidity or high dust, the presence of the seal can prevent problems such as excessive water entry leading to root rot, or dust accumulation affecting root breathing. In addition, the seal can also enhance the stability of the overall structure of the rooting shell, because it fills the possible weak links to a certain extent, making the connection between the layering strip and the rooting shell tighter, and when subjected to external impact or vibration, the rooting system inside the rooting shell is not easily damaged, thereby ensuring the smooth progress of the plant rooting process. The seal can be a sealing ring or a sealing block.

[0044] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for promoting the regeneration of declining shrub forests, characterized in that: include: S1: The number, density and distribution of regenerated shrubs are determined based on water resources and natural shrub distribution patterns, and flexible branch shrubs are regenerated by layering; S2: preparing a layering auxiliary rooting device, a substrate and a rooting promoting agent, wherein the layering auxiliary rooting device has a closed rooting chamber and a water collector connected to the rooting chamber, and the substrate is filled in the rooting chamber; S3: tidying up the open space between the bushes and digging to form a pit, and installing the lower end of the layering auxiliary rooting device in the pit; The end of the layering strip is girdled to remove the cortex and a rooting agent is applied, and the layering strip is operated to penetrate into the rooting cavity; S4: regularly checking the moisture condition of the substrate in the rooting chamber and the rooting condition of the layering strips, and replenishing water into the rooting chamber through the water collector; S5: After the roots on the layering strip grow into the rooting cavity, the layering strip auxiliary rooting device is removed and the layering strip is cut off to form an independent plant.

2. The method for promoting the regeneration of declining shrub forests according to claim 1, characterized in that: In step S2, the layering assisted rooting device also includes a root guide tube, a rooting shell, and a water guide tube; the root guide tube is arranged vertically and fixedly installed in the pit; the root guide tube is filled with a matrix; the rooting shell and the root guide tube are the rooting cavity, and are fixedly installed on the root guide tube; the rooting shell is provided with mounting holes arranged along the vertical direction and connecting holes arranged along the horizontal direction; the layering is passed through the connecting hole; the water guide tube passes through the mounting hole and is located in the rooting shell and the root guide tube, and the wall of the water guide tube is provided with a water seepage hole connected to the rooting shell and the root guide tube; the water collector is fixedly installed at the upper end of the water guide tube.

3. The method for promoting the regeneration of declining shrub forests as claimed in claim 2, characterized in that: The rooting shell comprises two half shells which are fixedly connected to each other. The half shells are provided with two symmetrically arranged grooves. The two half shells are connected to each other, and the four grooves are connected to each other in pairs to form the connecting hole.

4. The method for promoting the regeneration of declining shrub forests as claimed in claim 2, characterized in that: The water collector is a funnel, and the radial dimensions of the upper end of the water collector, the radial dimensions of the rooting shell, and the radial dimensions of the root guide tube decrease successively; the funnel is made of an opaque material and is used to shield the rooting shell from sunlight; the rooting shell and the root guide tube are both made of transparent materials and are used to observe the condition of the substrate and the growth of the layered roots.

5. The method for promoting the regeneration of declining shrub forests as claimed in claim 2, characterized in that: In step S3, a soil column is dug in the pit to form a receiving groove, and the rhizomes on the side walls of the receiving groove are cut off; the root guide tube is installed in the receiving groove, and the soil around the root guide tube is compacted.

6. The method for promoting the regeneration of declining shrub forests according to claim 1, characterized in that: In step S1, the regeneration density is designed according to the annual precipitation. In areas with annual precipitation < 200 mm, the shrub regeneration density is ≤ 600 bushes / hm2. 2 ; In areas with annual precipitation of 200 mm or less and annual precipitation of less than 400 mm, the shrub regeneration density shall be ≤ 1500 bushes / hm2 2 ; In areas with annual precipitation ≥ 400 mm, the shrub regeneration density is ≥ 2500 bushes / hm2 2 .

7. The method for promoting the regeneration of declining shrub forests according to claim 1, characterized in that: In step S3, two to three years old and 100-150 cm long lignified and flexible branches are selected as the layering strips; the layering strips are pulled down to the ground, and the pit is a circular area centered on the ring cut of the layering strip; and an extruder is arranged to act on the layering strip to extrude and fix the layering strip.

8. The method for promoting the regeneration of declining shrub forests as claimed in claim 1, characterized in that: In step S2, the matrix includes vermiculite, decomposed organic matter, perlite and compound fertilizer, wherein the volume ratio of the vermiculite, the decomposed organic matter and the perlite is 2:1:2, and the compound fertilizer accounts for 2% of the total mass of the matrix; the root-promoting agent includes 400 ppm of sodium indolebutyrate and talcum powder used to prepare the sodium indolebutyrate into a viscous state.

9. The method for promoting the regeneration of declining shrub forests according to claim 1, characterized in that: In step S1, it also includes renewing hard-branch shrubs by seed sowing; the seed sowing method requires pretreatment of the seeds to be sown, including germination and seed soaking; the seeds used for seed sowing are added to the rooting cavity, and the seedlings of the seed-soaked seeds grow and pass through the rooting cavity and continue to be cultivated to achieve shrub forest renewal.

10. The method for promoting the regeneration of declining shrub forests according to claim 9, characterized in that: The rooting cavity into which the layering strip penetrates and the rooting cavity into which seeds are added are sealed.

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