A method of promoting regeneration of a degraded shrubland

Abstract

This invention provides a method for promoting the regeneration of declining shrublands, belonging to the field of ecological environment restoration technology. The method includes determining the quantity, density, and distribution pattern of the regeneration shrubland based on water resource endowment and natural shrub distribution patterns; using layering to regenerate flexible branch shrubs; preparing a layering-assisted rooting device, a substrate, and a rooting agent; the layering-assisted rooting device having a closed rooting cavity and a water collector connected to the rooting cavity, with the rooting cavity filled with substrate; installing the lower end of the layering-assisted rooting device in a recess, applying the rooting agent to the layering strip, and inserting the layering strip into the rooting cavity; checking the substrate moisture and the rooting condition of the layering strip, and replenishing water into the rooting cavity; after the roots on the layering strip have grown into the rooting cavity, cutting the layering strip to form an independent plant. This invention provides a method for promoting the regeneration of declining shrublands, improving the rooting speed during ecological environment restoration, while allowing for quick and convenient water replenishment.

Description

Technical Field

[0001] This invention belongs to the field of ecological environment restoration technology, and more specifically, it relates to a method for promoting the regeneration of declining shrublands. Background Technology

[0002] In harsh habitats characterized by dry or cold climates unsuitable for tree growth, some shrubs can adapt well to these extreme conditions, resulting in the common distribution of shrub forests in these areas. Shrub forests play an important role in ecological functions and economic benefits. They can serve as high-quality fodder and fertilizer, raw materials for engineered wood products and pulp, and medicinal herbs. In low-altitude areas, shrubs often thrive in arid, barren, and high-temperature environments. Due to environmental stress (harsh climate, nutrient depletion around the roots), excessive human interference (frequent harvesting), or physiological decline (root aging), some shrubs face difficulties in seed germination and growth under these harsh conditions. Therefore, effective human intervention is needed to maintain the sustainable development of shrub forests. Current propagation techniques offer advantages such as high survival rates and ease of operation, but their disadvantages include slow root development and difficulty in watering, failing to meet the restoration needs of declining shrub forests. Summary of the Invention

[0003] The purpose of this 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 during the ecological restoration process in the prior art.

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

[0005] S1: Determine the quantity, density, and distribution method of the regeneration shrub forest based on water resource endowment and natural shrub distribution patterns, and use layering to regenerate flexible branch shrubs;

[0006] S2: Prepare a layering-assisted rooting device, a substrate, and a rooting agent. The layering-assisted rooting device has a closed rooting cavity and a water collector connected to the rooting cavity. The rooting cavity is filled with a substrate.

[0007] S3: Clear the open space between the shrubs and dig a pit. Install the lower end of the layering rooting device in the pit. Make a ring cut at the end of the layering strip to remove the bark and apply a rooting agent. Then, insert the layering strip into the rooting cavity.

[0008] S4: Regularly check the moisture level of the substrate and the rooting status of the layering in the rooting cavity, and replenish water to the rooting cavity through the water collector;

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

[0010] In one possible implementation, in step S2, the rooting device further 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 recess; the root guide tube is filled with a substrate; the rooting shell and the root guide tube form the rooting cavity and are fixedly installed on the root guide tube; the rooting shell has a vertically penetrating mounting hole and a horizontally penetrating connecting hole; the root guide tube passes 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 has a seepage hole communicating with 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 one possible implementation, the rooting shell includes two fixed half-shells that are connected to each other. Each half-shell has two symmetrically arranged grooves. The two half-shells are joined together, and the four grooves are joined together in pairs to form the connecting hole.

[0012] In one 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 sequentially; 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 material and are used to observe the substrate condition and the growth of the layered roots.

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

[0014] In one possible implementation, in step S1, the regeneration density is designed based on the annual precipitation. In areas with an annual precipitation of <200 mm, the shrub regeneration density is ≤600 shrubs / hm². 2 In areas with annual precipitation between 200mm and 400mm, the shrub regeneration density should be ≤1500 shrubs / hm². 2 In areas with an annual precipitation of ≥400mm, the shrub regeneration density should be ≥2500 shrubs / hm². 2 .

[0015] In one possible implementation, in step S3, a two- to three-year-old lignified flexible branch with a length of 100-150cm is selected as the pressing strip; the pressing strip is pulled down to the ground, and the recess is a circular area centered on the ring cut of the pressing strip; an extruder is arranged to act on the pressing strip to compress and fix the pressing strip.

[0016] In one possible implementation, in step S2, the substrate 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 substrate; the root-promoting agent includes 400 ppm sodium indolebutyrate and talc powder for adjusting the sodium indolebutyrate to a viscous state.

[0017] In one possible implementation, step S1 further includes renewing hardwood shrubs by seed sowing; the seed sowing method requires pretreatment of the seeds to be sown, including germination and soaking; the seeds used for seed sowing are added to the rooting cavity, and the seedlings of the seed sown grow and emerge from the rooting cavity to continue cultivation to achieve shrub forest renewal.

[0018] In one possible implementation, the rooting cavity into which the pressure strip is inserted and the rooting cavity into which the seeds are added are sealed.

[0019] The beneficial effects of the method for promoting the regeneration of declining shrublands provided by this invention are as follows: Compared with existing technologies, this method determines the regeneration density and layout by assessing water resource endowment and natural shrub distribution patterns in the early stages, avoiding water resource competition or ecological imbalance caused by indiscriminate planting. The closed rooting cavity and customized substrate of the layering-assisted rooting device provide a microenvironment suitable for root development, which is particularly suitable for the restoration needs of fragile ecosystems in arid / semi-arid regions. Rainwater and dew are collected by a water collector or water is quickly and conveniently added to the rooting cavity through manual operation to ensure rapid rooting of the layered strips. Finally, the rooting status of the layered strips is checked regularly, and the rooted strips are cut to form independent plants for cultivation. When the independent plants can play an ecological role in maintaining habitat stability, the surrounding declining shrubs can be removed, achieving shrub renewal. In this way, the rooting speed in the ecological restoration process is improved, and the watering operation can be completed quickly and conveniently. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 A schematic diagram illustrating a method for promoting the regeneration of declining shrublands provided in an embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the root growth assist device provided in an embodiment of the present invention;

[0023] Figure 3 An exploded view of the root growth assist device provided in an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram showing the usage state of the root growth assist device provided in an embodiment of the present invention.

[0025] The following are the labeling elements in the figure:

[0026] 10. Root canal; 20. Rooting shell; 21. Mounting hole; 22. Connecting hole; 23. Half shell; 24. Groove; 25. Snap-fit ​​fitting; 26. Limiting sleeve; 30. Water pipe; 31. Drainage hole; 40. Water collector; 41. Inlet; 42. Outlet; 50. Pressure strip; 51. Recess. Detailed Implementation

[0027] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

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

[0029] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention.

[0030] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0031] Please see Figures 1 to 4The present invention will now describe a method for promoting the regeneration of declining shrublands. A method for promoting the regeneration of declining shrublands includes: S1: determining the number, density, and distribution pattern of the regeneration shrubland based on water resource endowment and natural shrub distribution patterns, wherein flexible branch shrubs are regenerated using layering 50; S2: preparing a layering-assisted rooting device, a substrate, and a rooting agent, wherein the layering-assisted rooting device has a closed rooting cavity and a water collector 40 connected to the rooting cavity, and the rooting cavity is filled with substrate; S3: clearing the open spaces between shrubs and excavating pits 51, and installing the lower end of the layering-assisted rooting device in the pits 51; The end of the layering strip 50 is girdled to remove the bark and a rooting agent is applied. The layering strip 50 is then inserted into the rooting cavity. Seeds for seed sowing are added to the rooting cavity. S4: The moisture level of the substrate and the rooting status of the layering strip are checked regularly, and water is added to the rooting cavity by the water collector 40. S5: After the roots on the layering strip 50 have grown into the rooting cavity, the rooting aid device is removed and the layering strip 50 is cut off to form an independent plant. Seedlings from seed sowing grow and emerge from the rooting cavity to continue cultivation. The independent plants are cultivated to achieve shrubland regeneration.

[0032] The method for promoting the regeneration of declining shrublands provided by this invention, compared with existing technologies, determines the regeneration density and layout by assessing water resource endowment and natural shrub distribution patterns in advance, avoiding water resource competition or ecological imbalance caused by indiscriminate planting. The closed rooting cavity and customized substrate of the layering-assisted rooting device provide a microenvironment suitable for root development, which is particularly suitable for the restoration needs of fragile ecosystems in arid / semi-arid regions. Rainwater and dew are collected by the water collector 40 or water is quickly and conveniently added to the rooting cavity through manual operation to ensure rapid rooting of the layered strips 50. Finally, the rooting status of the layered strips 50 is checked regularly, and the rooted strips are cut to form independent plants for cultivation. When the independent plants can play an ecological role in maintaining habitat stability, the surrounding declining shrubs can be removed to achieve shrub renewal. In this way, the rooting speed in the ecological restoration process is improved, and the watering operation can be completed quickly and conveniently.

[0033] When cultivating individual plants, enhanced fertilizer and water management promotes their growth. Once the new plants are able to fulfill their ecological functions and maintain habitat stability, surrounding declining shrubs can be removed to achieve shrub renewal. The branches and leaves of declining shrubs can be used to cover the ground, improving microhabitats and increasing soil fertility. This method is suitable for renewing flexible-branched shrub forests such as lilac, purple locust, forsythia, caragana, willow, wolfberry, red osier dogwood, and sand willow.

[0034] Please see Figures 1 to 4As a specific embodiment of the method for promoting the regeneration of declining shrublands provided by the present invention, in step S2, the layering-assisted rooting device further 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 substrate; the rooting shell 20 and the root guide tube 10 have rooting cavities inside and are fixedly installed on the root guide tube 10; the rooting shell 20 is provided with a vertically penetrating mounting hole 21 and a horizontally penetrating connecting hole 22; the layering strip 50 passes through the connecting hole 22; the water guide tube 30 passes through the mounting hole 21 and is located in the rooting shell 20 and the root guide tube 10, and the wall of the water guide tube 30 is provided with a seepage hole 31 communicating with the rooting shell 20 and the root guide tube 10; the water collector 40 is fixedly installed on the water guide tube 30. The upper end of the rooting tube 20 is used. During use, the rooting tube 10 is filled with substrate and installed in the recess. The rooting shell is filled with substrate, and the pressing strip 50 is passed through the connecting hole 22 into the rooting shell 20. The lower end of the rooting shell 20 is then installed on the rooting tube 10. The water guide tube 30 is then passed from top to bottom through the installation hole 21 into both the rooting shell 20 and the rooting tube 10, with the seepage holes 31 on the water guide tube 30 corresponding to the rooting shell 20 and the rooting tube 10, respectively. Finally, the water collector 40 is fixedly installed at the upper end of the water guide tube 30. During the rooting process, the pressing strip 50 provides nutrients for root growth using the substrate. The water collector 40 collects rainwater or artificial irrigation, making the operation quick and simple. This allows water to flow through the water guide tube 30 and the seepage holes 31 into the substrate, thereby inducing accelerated root growth.

[0035] Specifically, a soil column is dug at the bottom of the pit 51 and a root guide tube 10 is installed, then the soil outside the root guide tube 10 is compacted. The substrate in the rooting shell 20 and the root guide tube 10 is relatively moist. Before installing the layering strip 50, a 1-2 cm layer of bark is girdled at the upper rooting position of the layering strip 50 (to avoid damaging the xylem), and a layer of rooting agent is applied. The substrate in the rooting shell 20 provides a good environment for plant rooting, and the seepage holes 31 of the water guide tube 30 allow water to slowly permeate into the substrate of the rooting shell 20 and the root guide tube 10, ensuring even distribution of moisture and meeting the water needs of the plant in the early stages of growth. The inlet 41 of the water collector 40 can collect rainwater or other external water sources, and the water is transported to the water guide tube 30 through the outlet 42. The lower end of the rooting housing 20 is provided with a limiting sleeve 26 arranged around the lower opening of the mounting hole 21. The diameter of the lower opening of the mounting hole 21 is the same as the inner diameter of the root canal 10. The upper end of the root canal 10 is fitted into the limiting sleeve 26. When the rooting housing 20 is installed on the upper end of the root canal 10, the upper end of the root canal 10 is fitted into the limiting sleeve 26, and the outer side wall of the root canal 10 is tightly fitted with the inner side wall of the limiting sleeve 26 to ensure the stability of the installation. The height of the limiting sleeve 26 is set to provide good support and positioning for the root canal 10, preventing it from shaking or shifting during use. Small protrusions are also provided on the inner wall of the limiting sleeve 26. These protrusions further increase the friction between the limiting sleeve and the root canal 10, thereby enhancing the firmness of the connection between the two.

[0036] Please see Figures 1 to 4 As a specific embodiment of the method for promoting the regeneration of declining shrublands provided by the present invention, the rooting shell 20 includes two opposing and fixed half-shells 23. Each half-shell 23 has two symmetrically arranged grooves 24. The two half-shells 23 are joined together, and the four grooves 24 are joined in pairs to form connecting holes 22. Each groove 24 is semi-circular in shape, and its radius matches the radius of the connecting hole 22 to be formed. When joining the half-shells 23, the operator needs to ensure that the four grooves 24 are precisely aligned, which can be achieved with the help of auxiliary tools such as positioning pins. First, the positioning pins are inserted into the preset positioning holes on the half-shells 23 to initially position the two half-shells 23, and then the two half-shells 23 are firmly fixed together using other connecting parts. With this structure, the pressure strip 50 is first installed on one half-shell 23, and then the other half-shell 23 is joined and installed on the first half-shell 23 from top to bottom. The two half-shells 23 are also provided with a plurality of interconnected snap-fit ​​pieces 25, which are located between adjacent grooves 24. The plurality of snap-fit ​​pieces 25 are respectively installed between two adjacent grooves 24 to avoid interference with the connecting hole 22, and the plurality of snap-fit ​​pieces 25 make the connection between the two half-shells 23 more stable and reliable. The two mating snap-fit ​​pieces 25 are respectively a snap-fit ​​shape and a snap-fit ​​groove that matches the snap-fit ​​shape.

[0037] Please see Figures 1 to 4 In one specific embodiment of the method for promoting the regeneration of declining shrublands provided by the present invention, the water collector 40 is a funnel, with the radial dimensions of the upper end of the water collector 40, the radial dimensions of the rooting shell 20, and the radial dimensions of the root guide tube 10 decreasing sequentially. The funnel is made of opaque material to shield the rooting shell 20 from sunlight. Both the rooting shell 20 and the root guide tube 10 are made of transparent material to observe the substrate condition and the growth of the layered roots. As the water collector 40, the funnel has its large opening facing upwards as the inlet 41, which can effectively collect water from a large area, whether it is rainwater or other liquid water sources, which can quickly converge into the funnel. The small opening serves as the outlet 42, which facilitates the centralized guidance of the collected water into the water guide tube 30. Through this method of gradually decreasing radial dimensions from top to bottom, the funnel can produce a certain shading effect, which can lower the temperature to reduce evaporation and keep the temperature and humidity inside the rooting shell 20 in a relatively stable state. Both the rooting shell 20 and the root canal 10 are made of transparent material, which makes it easy for staff to observe the substrate condition and the root growth of the layering strip 50, and facilitates the implementation of corresponding management measures.

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

[0039] Please see Figure 1 As a specific embodiment of the method for promoting the regeneration of declining shrublands provided by the present invention, in step S1, the regeneration density is designed based on the annual precipitation. In areas with an annual precipitation of <200 mm, the shrub regeneration density is ≤600 shrubs / hm². 2 In areas with annual precipitation between 200mm and 400mm, the shrub regeneration density should be ≤1500 shrubs / hm². 2 In areas with an annual precipitation of ≥400mm, the shrub regeneration density should be ≥2500 shrubs / hm². 2 Designing regeneration density schemes based on annual precipitation has proven effective in vegetation restoration and ecological construction. For example, in arid regions with annual precipitation <200mm, due to extreme water scarcity, a lower shrub regeneration density of ≤600 shrubs / hm² is necessary. 2This ensures that each shrub has a relatively sufficient water supply, preventing overplanting from causing large-scale vegetation death due to water competition. In areas with annual precipitation between 200mm and 400mm, the shrub regeneration density should be limited to ≤1500 shrubs / hm². 2 This allows shrubs to grow better under relatively limited rainfall conditions, ensuring both a gradual increase in vegetation cover and their survival rate under existing rainfall conditions. For areas with annual rainfall ≥400mm, a higher shrub regeneration density of ≥2500 shrubs / hm² is recommended. 2 This allows for the full utilization of relatively abundant rainfall resources, rapidly increasing vegetation cover and thus achieving multiple ecological functions such as improving the ecological environment, reducing soil erosion, and regulating the local climate.

[0040] Please see Figure 1 As a specific embodiment of the method for promoting the regeneration of declining shrublands provided by the present invention, in step S3, two- to three-year-old lignified and flexible branches with a length of 100-150cm are selected as layering strips; the layering strips are pulled down to the ground, and the depression is a circular area centered on the girdling point of the layering strip; an extrusion device is placed on the layering strip to press and fix it; by selecting specific layering strips, the rooting of the layering strips is made more smoothly and quickly, and the rooting is not affected by the problems of the layering strips themselves. When placing the extrusion device, it is necessary to ensure that the pressure applied is moderate, which can firmly press and fix the layering strip to prevent it from loosening and shifting in the subsequent process, but will not damage the layering strip due to excessive pressure. The extrusion device can be made of materials with a certain degree of elasticity and toughness, such as specially made rubber clamps or soft plastic clamps. New shoots emerging from shrubs can be used for layering. When the new shoots grow to 20-30cm, retain 2 to 4 shoots for cultivation. Alternatively, stronger branches can be selected and medium to short pruning can be used to promote the growth of new shoots. Usually, 1 / 3 to 1 / 2 of the branch is cut off, leaving a plump bud below the cut. This method will promote the growth of strong branches from lateral buds, resulting in high branching ability and strong growth.

[0041] Please see Figure 1As a specific embodiment of the method for promoting the regeneration of declining shrublands provided by the present invention, in step S2, the substrate 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 substrate; the root-promoting agent includes 400 ppm sodium indolebutyrate and talc powder used to adjust sodium indolebutyrate to a viscous state; the main components of the substrate include vermiculite, decomposed organic matter, perlite, and compound fertilizer, which are mixed and stirred evenly in a specific ratio, 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 substrate. Through this substrate, the good air permeability and water retention of vermiculite and perlite, combined with the nutrients provided by decomposed organic matter, provide a suitable environment for growth. The compound fertilizer used is a 15-15-15 compound fertilizer, and the decomposed organic matter consists of crushed straw and other agricultural and forestry waste. The rooting agent is prepared by first diluting a certain amount of sodium indolebutyrate with water to 400 ppm, and then using an appropriate amount of talc to prepare a slightly viscous 400 ppm sodium indolebutyrate aqueous solution. Using this type of rooting agent can promote faster rooting of layering. Throughout the process, it is important to maintain the moisture level of the substrate. After implementation, the layering grows normally, with a rooting rate of over 85%, achieving revegetation in the same year and the formation of independent plants in the second year. Watering frequency is reduced by over 30%, fertilizer usage by 20%, and costs by over 50%. Furthermore, the shrub's root system grows downwards, improving drought resistance and soil stabilization, and increasing the number of surface insects.

[0042] Please see Figure 1As a specific implementation of the method for promoting the regeneration of declining shrublands provided by the present invention, step S1 also includes regeneration of hardwood shrubs by seed sowing; the seed sowing method requires pretreatment of the seeds to be sown, including germination and soaking; the seeds used for seed sowing are added to the rooting cavity, and the seedlings of the seed sown grow and emerge from the rooting cavity to continue cultivation to achieve shrubland regeneration; the hardwood shrubs are first regenerated by seed sowing, thereby increasing the coverage of the method for promoting the regeneration of declining shrublands and improving the ecological function restoration effect of shrublands. Specifically, the seeds to be sown are pretreated first, and native tree species with rapid germination, fast seedling growth, strong adaptability and resistance, abundant seed sources and low prices are selected. The seeds are pretreated, including (1) germination: the deep dormant seeds sown in spring should be germinated in advance so that the seedlings emerge uniformly in the same year and can be fully lignified before the end of autumn to achieve the purpose of safe overwintering. (2) soaking: the forced dormant seeds sown in spring are soaked to promote the seedlings to emerge uniformly as soon as possible. Then, the seeds are added to the rooting chamber of the layering-assisted rooting device, where they grow using the substrate. Finally, enhanced fertilizer and water management is adopted to promote growth. After 1 to 2 years of growth, the declining shrubs can be removed to achieve shrub replacement and renewal. This method is suitable for the renewal of hard-branched shrub forests such as jujube, tamarisk, hazel, tiger hazel, vitex, and sea buckthorn.

[0043] Please see Figure 1 As a specific embodiment of the method for promoting the regeneration of declining shrublands provided by this invention, the rooting cavity into which the layering strip is inserted and the rooting cavity into which seeds are added are sealed; the layering strip-assisted rooting device is also sealed, especially the connecting holes on the rooting shell. This effectively prevents external substances from entering the rooting cavity, thereby creating a relatively stable and clean internal environment for rooting. In environments with high humidity or dust, the presence of the seal can prevent excessive moisture from entering and causing root rot, or dust accumulation from affecting root respiration. Furthermore, the seal can enhance the overall structural stability of the rooting shell because it fills in potential weak points to a certain extent, making the connection between the layering strip and the rooting shell tighter. When subjected to external impact or vibration, the rooting system inside the rooting shell is less likely to be damaged, thus ensuring the smooth progress of the plant rooting process. The seal can be a sealing ring or a sealing block.

[0044] The above are merely 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 within the protection scope of the present invention.

Claims

1. A method for promoting the regeneration of declining shrublands, characterized in that, include: S1: Determine the quantity, density, and distribution method of the regeneration shrub forest based on water resource endowment and natural shrub distribution patterns, and use layering to regenerate flexible branch shrubs; S2: Prepare a layering-assisted rooting device, a substrate, and a rooting agent. The layering-assisted rooting device has a closed rooting cavity and a water collector connected to the rooting cavity. The rooting cavity is filled with a substrate. S3: Clear the open space between shrubs and dig a pit, then install the lower end of the layering rooting device into the pit; The end of the strip is girdled to remove the bark and a rooting agent is applied. The strip is then inserted into the rooting cavity. S4: Regularly check the moisture level of the substrate and the rooting status of the layering in the rooting cavity, and replenish water to the rooting cavity through the water collector; S5: After the roots on the layered strip grow into the rooting cavity, the rooting auxiliary device of the layered strip is removed and the layered strip is cut off to form an independent plant; In step S2, the rooting device further 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 recess; the root guide tube is filled with substrate; the rooting shell and the root guide tube form the rooting cavity and are fixedly installed on the root guide tube; the rooting shell has a vertically penetrating mounting hole and a horizontally penetrating connecting hole; the root guide tube passes 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 has a seepage hole communicating with the rooting shell and the root guide tube; the water collector is fixedly installed at the upper end of the water guide tube; The rooting shell includes two fixed half-shells that are connected to each other. Each half-shell has two symmetrically arranged grooves. The two half-shells are joined together, and the four grooves are joined together in pairs to form the connecting hole. 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 sequentially. The funnel is made of an opaque material and is used to shield the rooting shell from sunlight. Both the rooting shell and the root guide tube are made of transparent material and are used to observe the substrate condition and the growth of the layered roots.

2. The method for promoting the regeneration of declining shrublands as described in claim 1, characterized in that, In step S3, a soil column is excavated in the pit to form a receiving groove, and the rhizomes on the side wall of the receiving groove are cut off; the root guide tube is installed into the receiving groove, and the soil around the root guide tube is compacted.

3. The method for promoting the regeneration of declining shrublands as described in claim 1, characterized in that, In step S1, the density of the renewal is designed according to the annual precipitation, the shrub renewal density ≤ 600 bushes / hm in the area where the annual precipitation < 200 mm 2 ; the shrub renewal density ≤ 1500 bushes / hm in the area where 200 mm ≤ annual precipitation < 400 mm 2 ; the shrub renewal density ≥ 2500 bushes / hm in the area where the annual precipitation ≥ 400 mm 2 .

4. The method for promoting the regeneration of declining shrublands as described in claim 1, characterized in that, In step S3, a two- to three-year-old lignified flexible branch with a length of 100-150cm is selected as the pressing strip; the pressing strip is pulled down to the ground, and the recess is a circular area centered on the ring cut of the pressing strip; an extrusion member is arranged to act on the pressing strip to compress and fix the pressing strip.

5. The method for promoting the regeneration of declining shrublands as described in claim 1, characterized in that, In step S2, the substrate 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 substrate; the root-promoting agent includes 400 ppm sodium indolebutyrate and talc powder used to adjust the sodium indolebutyrate into a viscous state.

6. The method for promoting the regeneration of declining shrublands as described in claim 1, characterized in that, In step S1, the regeneration of hardwood shrubs is also carried out by seed sowing. Seed sowing requires pretreatment of the seeds to be sown, including germination and soaking. The seeds are added to the rooting cavity, and the seedlings of the seed sown grow and emerge from the rooting cavity to continue cultivation to achieve shrub regeneration.

7. The method for promoting the regeneration of declining shrublands as described in claim 6, characterized in that, The rooting cavity into which the pressing strip is inserted and the rooting cavity into which seeds are added are sealed.

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