CN112602521A - Technology for promoting growth and updating of clustered tree species through regulating and controlling crown width of sub-high mountain shrubs - Google Patents

Abstract

The invention belongs to the field of plant planting, and particularly relates to a technology for regulating and controlling the crown width of a sub-high mountain shrub to promote the growth and the renewal of a population-forming tree species. The specific technical scheme is as follows: the canopy width of the bush is removed or constrained, either entirely or partially. The invention provides a method for accelerating vegetation succession as much as possible with minimal influence on the environment under the condition of not artificially interfering the local environment as much as possible (including but not limited to fertilization, deinsectization, weeding and the like).

Description

Technology for promoting growth and updating of clustered tree species through regulating and controlling crown width of sub-high mountain shrubs

Technical Field

The invention belongs to the field of plant planting, and particularly relates to a technology for regulating and controlling the crown width of a sub-high mountain shrub to promote the growth and the renewal of a population-forming tree species.

Background

The southwest Asia high mountain coniferous forest is the main body of the second most natural forest area in China, the vegetation resource is very rich, and the ecological service function is stable. However, in the end of the 50 s to 90 s of the 20 th century, large-scale felling of coniferous forests is carried out in the area to meet the national requirements for wood, so that forest resources are greatly reduced sharply, vegetation is in reverse succession, and ecological service functions are rapidly degraded, weakened or even difficult to exert. Later, some traditional soil preparation afforestation methods are adopted successively to carry out artificial afforestation on the cutting land of the area, but the effect is not good. Mainly because the traditional land preparation afforestation mode has obvious shortcomings: (1) the interference to the land is large, and natural disasters such as water and soil loss are easily caused or aggravated; (2) a large amount of manpower and financial resources are consumed in the afforestation processes of land preparation, seedling raising, planting and the like; (3) due to high-altitude severe environments (low temperature, short growing season and the like), the survival rate of afforestation tree species is low; (4) the artificial afforestation tree species are single, which results in the mature forests of the same age and low biological diversity under the forests.

At present, large areas of cutting sites exist in the places without artificial forestation. Due to various reasons, shrubbery is generated on the cutting land without artificial afforestation, so that shrubbery plants are distributed on the cutting land in a large scale, and the cutting land with large area is still in the stage of shrubbery community. Subsequently, due to the change of the environment, under the regulation of the positive feedback formed by multiple factors, the bush develops more rapidly, so that a shade environment (especially low light) is formed, and the growth and the renewal of the population tree seeds (seeds intercepted by the bush canopy width) under the bush are inhibited. The concrete expression is as follows: the seedlings of the tree species established under the shrub are difficult to sprout, or even if the seedlings can sprout, the grown seedlings can grow abnormally, such as crown deviation or tip breakage and the like, due to shading of the shrub, and the forest land is slow in succession renewal.

Therefore, the exploration of the theory and the method for scientifically and effectively accelerating the restoration process of the irrigated land of the subalpine mountain is a task that the continuous operation management and development of the forests of the southwest Asia mountain of China cannot be avoided. Aiming at natural phenomena of low ecological function, slow succession and the like of a secondary irrigation plot in a subalpine, how to remove factors (environmental restriction and biological factors) for limiting the restoration of the ecological function of the irrigation plot is a key. However, the subalpine shrub land is in a high and cold area (with cold climate and poor soil), and the ecological environment is very weak. Therefore, it is technically critical to minimize the jamming, or to minimize the jamming strength.

Disclosure of Invention

The invention aims to provide a technology for regulating and controlling the crown width of a sub-high mountain shrub to promote the growth and the renewal of a group-built tree species.

In order to achieve the purpose of the invention, the technical scheme adopted by the invention is as follows: a method for promoting growth and renewal of tree species in a colony comprises removing or restraining all or part of the canopy width of the colony.

Preferably, the canopy width of the brush is removed or constrained 1/2.

Correspondingly, the shrub crown breadth restraint device is annular and comprises an inner ring adjusting structure with the diameter of an adjustable inner ring, and an outer ring of the inner ring adjusting structure is connected with an outer ring with the diameter unchanged.

Preferably, the outer ring is a whole, and the inner ring adjusting structure comprises a plurality of fastening structures which are arranged on the outer ring in a penetrating way; the fastening structure comprises a positioning pin, one part of the positioning pin is inserted into the outer ring, is in clearance fit with the outer ring, can perform linear reciprocating motion relative to the outer ring, and can be fixed with the outer ring under the action of the limiting structure;

and the outer surface of the longitudinal bottom of the positioning pin is fixedly connected with a third elastic component, and the other end of the third elastic component penetrates through the outer ring and is connected with the fastening block.

Preferably, the locating pin is T-shaped, a longitudinal part of the locating pin is inserted into the outer ring, a transverse part of the locating pin protrudes out of the outer surface of the outer ring, the locating pin is hollow, a limiting rod penetrates through the locating pin, one end of the limiting rod protrudes out of the outer surface of the transverse part of the locating pin, the other end of the limiting rod is positioned in the longitudinal part of the locating pin, the limiting rod is positioned in the locating pin, the inner part of the locating pin is fixedly connected with a rubber bump, the bump is perpendicular to the limiting rod, a plurality of first limiting grooves for accommodating the bump are correspondingly arranged in,

in a natural state, the lug penetrates through the positioning pin and is clamped into the first limiting groove to limit the relative movement of the positioning pin and the outer ring; the limiting rod is extruded, the lug exits from the first limiting groove and enters the positioning pin, and the positioning pin can perform linear reciprocating motion relative to the outer ring.

Preferably, the outer ring is an openable structure, the inner ring adjusting structure comprises a plurality of movable blocks which are connected to the inner side wall of the outer ring in a sliding manner, at least one pair of adjacent movable blocks are not connected, and the rest movable blocks are connected through a first elastic component;

a limiting structure for the relative movement of the movable block and the outer ring is arranged between the movable block and the outer ring.

Preferably, each movable block comprises a movable block base close to the inner ring side and a movable block top cover close to the outer ring side, and the width of the movable block top cover is greater than that of the movable block base;

the outer loop inside wall sets up and holds the movable block at the gliding sliding tray of outer loop, and the width of movable block top cap is greater than the width of sliding tray, and the width of movable block base is less than the width of sliding tray.

Preferably, the at least two adjacent movable blocks are oppositely provided with first limiting structures, and a first elastic part is not arranged between the two movable blocks which are oppositely provided with the first limiting structures;

the first limiting structure comprises an L-shaped limiting block which is arranged inside the movable block in a penetrating manner, one transverse end of the limiting block penetrates through and protrudes out of the side face of the movable block base, the bottom of one transverse end of the limiting block is fixed inside the movable block base through a second elastic part, and one longitudinal end of the limiting block penetrates through and protrudes out of the movable block top cover and extends into the inner side wall of the outer ring;

a plurality of limiting grooves for accommodating the longitudinal ends of the limiting blocks are arranged at corresponding positions on the inner side wall of the outer ring, and when the limiting blocks are in a natural state, the tops of the limiting blocks are positioned in the limiting grooves to limit the relative movement between the movable blocks and the outer ring; the limiting block is extruded towards the direction of the inner ring until the limiting block leaves the limiting groove, and the movable block and the outer ring can move relatively.

Preferably, the inner ring of the inner ring adjusting structure is elastically connected with a circle of elastic mesh enclosure, and the center of the mesh enclosure is provided with a central hole for accommodating the shrub crown breadth.

Preferably, a plurality of soft rods are symmetrically arranged outside the outer ring, the soft rods can rotate universally and stretch and compress longitudinally, and the soft rods can be automatically shaped after rotating, stretching and compressing to required positions, so that the force of the rotation, stretching and compression of the soft rods is greater than the gravity of the restraint device.

The invention has the following beneficial effects:

the invention provides a method for accelerating vegetation succession promotion as much as possible with minimal environmental impact and without human intervention (including but not limited to fertilization, deinsectization, weeding and the like) on local environment as much as possible, namely: removing or restricting a portion of the local bushes.

The inventor finds that the bush has a certain microenvironment in research, and has a certain help effect on the growth of the arbor plant seedlings. Instead, the growth of the seedling may be affected if the shrubs are removed directly. And if partial crown breadth of the bush is directly removed, under certain conditions, the growth of seedlings can be helped to a certain extent, but bush stress can be caused at the same time, so that the microenvironment of the root system of the bush is changed, different factors are introduced, and adverse effects are brought to subsequent further scientific research work. Moreover, the removal of the canopy width of the bush is also limited by the experience of operators, and the removal degree of the canopy width of different types of bushes is different; excessive removal not only results in inaccurate test results but also may result in brush death or conversely inhibits the growth of seedlings. Therefore, the inventor further provides a shrub restraint which can directly restrain the crown breadth of the shrub without independently removing the crown breadth of the shrub, can adjust the contraction degree of the crown breadth according to needs, cannot directly damage the shrub and leaves sufficient growth space for the shrub. After the experiment is finished or the local vegetation succession reaches a certain degree, the restraint device can be recycled, and the device can be used repeatedly and is ecological and environment-friendly.

Drawings

FIG. 1 is a schematic structural diagram of the present invention according to an embodiment;

FIG. 2 is a schematic structural view of the fastening structure of FIG. 1;

FIG. 3 is a schematic structural view of the fastening structure of FIG. 1 when the stop lever is pushed;

FIG. 4 is a schematic structural diagram of the present invention according to another embodiment;

FIG. 5 is an enlarged view of FIG. 4 at A;

fig. 6 is a schematic structural view of the matching relationship between the movable block and the sliding groove under the view angle B-B in fig. 4.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Unless otherwise specified, the technical means used in the examples are conventional means well known to those skilled in the art.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, are merely for convenience of description of the present invention, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.

The invention provides a method for promoting the growth and the updating of a group-building tree species, which completely or partially removes or restrains the canopy width of a shrub. The preferable scheme is as follows: the canopy of the shrub is removed or constrained 1/2.

Further, the invention provides a shrub crown width restraint device, which is annular as a whole and comprises an inner ring adjusting structure capable of adjusting the diameter of an inner ring, wherein the outer ring of the inner ring adjusting structure is connected with an outer ring 20 with a constant diameter. The outer ring 20 is a rigid structure.

The restraint device can be set into a whole-circle integrated structure, when the restraint device is used, the diameter of the inner ring adjusting structure is adjusted to be the largest, the inner ring adjusting structure is horizontally placed from top to bottom, the shrubs are sleeved, the crown width is restrained in the inner ring adjusting structure, the inner ring adjusting structure is adjusted to be a proper diameter, the crown width is restrained, and the restraint device is kept in a state that the restraint device cannot fall off. In this way, the inner ring adjusting structure can adjust the diameter of the inner ring of the restraint device, and the specific diameter adjusting range is determined according to the diameter of the main crown of the local shrub; the size of the outer ring 20 determines the upper limit of the inner ring diameter.

When the restraint device is integrally formed as a whole ring, in one embodiment, as shown in fig. 1-3, the outer ring 20 is a single body, and the inner ring adjustment structure includes a plurality of fastening structures penetrating the outer ring 20. The fastening structure comprises a positioning pin 51, wherein a part of the positioning pin 51 is inserted into the outer ring 20, is in clearance fit with the outer ring 20, can perform linear reciprocating motion relative to the outer ring 20, and can be fixed with the outer ring 20 under the action of the limiting structure. It should be understood that: when the limiting structure is not limited, the positioning pin 51 can enter and exit from the corresponding opening hole on the outer ring 20, but a certain friction force exists because the positioning pin 51 is in clearance fit with the hole of the outer ring 20; and the restrainer is horizontal in the use state, so even if no limiting structure is provided, the positioning pin 51 can not move relative to the outer ring 20 at will when no external force is applied. After the positioning pin 51 moves to the desired position, the limiting structure is activated, and the positioning pin 51 is fixed relative to the outer ring 20. To facilitate more accurate movement of the positioning pin 51 to a desired position, the outer surface of the outer positioning pin 51 may be provided with a scale (not shown).

The outer surface of the longitudinal bottom of the positioning pin 51 is fixedly connected with a third elastic member 54 (such as a rigid spring), and the other end of the third elastic member 54 penetrates through the outer ring 20 and is connected with a fastening block 55. After the restraint device is sleeved on the bush, the fastening blocks 55 and the crown of the bush are mutually extruded to restrain the bush. The depth of the positioning pin 51 entering the outer ring 20 is adjusted, and then the tightness degree of the third elastic component 54 between the positioning pin 51 and the fastening block 55 is adjusted, so that the crown breadth is squeezed from the back surface of the fastening block 55, and the bush is further restrained to the required diameter. The third elastic member 54 has a certain rigidity and does not significantly drop due to its own weight or the weight of the fastening block 55.

The preferred mode is as follows: the fastening structures are symmetrically arranged, for example 3 symmetrically arranged in the figure, on the outer ring 20. The fastening structures are relatively independent, and when one side of the brush grows more vigorously, the corresponding fastening structures can be independently arranged to be tighter.

The limiting structure may be a pin body arranged between the positioning pin 51 and the outer ring 20, or may be a snap structure or the like.

In one embodiment, the limiting structure includes a limiting rod 51. The method specifically comprises the following steps: the locating pin 51 is T-shaped, a longitudinal part of the locating pin 51 is inserted into the outer ring 20, a transverse part of the locating pin protrudes out of the outer surface of the outer ring 20, the locating pin 51 is hollow, a limiting rod 51 penetrates through the locating pin 51, one end of the limiting rod 52 protrudes out of the outer surface of the transverse part of the locating pin 51, the other end of the limiting rod is located inside the longitudinal part of the locating pin 51, the limiting rod 52 is located inside the locating pin 51 and fixedly connected with a rubber bump 53, the bump 53 is perpendicular to the limiting rod 52, a plurality of first limiting grooves 23 for containing the bump 53 are correspondingly arranged inside the outer ring 20, and the.

As shown in fig. 1, in a natural state, the overhanging end of the protrusion 53 penetrates through the positioning pin 51 and is clamped into the first limiting groove 23, so as to limit the relative movement between the positioning pin 51 and the outer ring 20. As shown in fig. 3, the stopper rod 52 is pressed, the overhanging end of the projection 53 exits the first stopper groove 23 and enters the positioning pin 51, and the positioning pin 51 can perform a linear reciprocating motion relative to the outer ring 20. After the positioning pin 51 moves to a desired position, the stopper rod 52 is released, and the projection 53 protrudes from the inside of the positioning pin 51 again and enters the corresponding first stopper groove 23. The length of the bump 53 satisfies: after the positioning pin 51 is extended out, the positioning pin can enter the first limiting groove 23 and cannot slide out, after the positioning pin 51 is entered, the suspension end of the convex block 53 is just located at the opening position of the side wall of the positioning pin 51, and cannot completely enter the positioning pin 51, so that the positioning pin 51 cannot be accurately extended out from the opening position of the side wall of the positioning pin 51 next time.

The preferable scheme is as follows: the inner ring of the fastening block 55 is connected with a circle of elastic mesh enclosure 40, and the center of the mesh enclosure 40 is provided with a center hole for accommodating the bush crown. The net cover 40 can be arranged as required and detachably connected with the fastening block 55. When the bush is particularly luxuriant, or the fastening blocks 55 are fewer in number and cannot completely restrain the bush well, the net cover 40 can be arranged to further restrain the crown breadth in the middle of the bush; the upper end of the brush protrudes from the central hole of the mesh enclosure 40. The net cover 40 has certain elasticity, and the arrangement mode is also suitable for mounting the restraint devices on all the shrubs in advance when the shrubs are small. When the bush is small, the net 40 is used to restrain the bush, and then the fastening block 55 is adjusted to a relatively tight state. The brush grows gradually, expanding the mesh cover 40 gradually, and is restrained gradually by the fastening block 55. This also leaves a certain growing space for the bushes to avoid damaging the local environment.

The more preferable scheme is as follows: a plurality of soft rods 10 are symmetrically arranged outside the outer ring 20. The soft rod 10 can rotate universally and stretch and compress longitudinally, and can be automatically shaped after rotating, stretching and compressing to a required position, so that the force for rotating, stretching and compressing the soft rod 10 is greater than the gravity of the restraint device. The soft rod 10 can be a metal hose, a silica gel hose and the like, and can be made of a table lamp hose material which can be bent and shaped in the mature prior art. The soft rod 10 may be bent toward the sky or the ground. When the bush is particularly luxuriant, the restraint device is tightly clamped on the bush, and the soft rod can be bent towards the sky and above the bush to further restrain the bush. When the bush is not very full, the restraint device may not be fastened at the early stage, the soft rod 10 is bent towards the ground, and the suspension end of the soft rod 10 is set to be a sharp angle and can be directly inserted into the soil; of course, it is also possible to dig a hole for burying the soft rod 10 manually, and bury the soft rod 10 to play a role of supporting and stabilizing the restraint device.

In another embodiment, the restraint device may be configured to be openable and closable by, for example, engagement, adhesion, or clipping. When the crown breadth of the bush is large and exceeds the upper limit of the outer ring 20 or the bush is inconvenient to be directly sleeved, the opening and closing structures such as the buckles on the outer ring 20 can be opened to enclose the crown breadth of the bush, and then the outer ring 20 is closed. Under the arrangement mode, the inner ring adjusting structure is correspondingly arranged into an opening and closing structure. When the outer ring 20 cannot be closed, the outer ring 20 and the inner ring adjusting structure can enclose the shrub crown as much as possible, a circle of elastic mesh enclosure 40 is arranged at the inner ring of the inner ring, and a central hole for the shrub crown to extend upwards is formed in the center of the mesh enclosure 40. The elastic mesh 40 may be used with the semi-open outer ring 20 and inner ring adjustment structure to bind the brush. Furthermore, a plurality of soft rods 10 can be symmetrically arranged outside the outer ring 20, the soft rods 10 can rotate universally and stretch and compress longitudinally, and can be automatically shaped after being rotated, stretched and compressed to a required position, so that the force of rotation, stretching and compression of the soft rods 10 is greater than the gravity of the restraint device. The soft rod 10 is bent upwards and towards the middle to further restrain the bush. In the arrangement mode, the opening and closing size of the inner ring adjusting structure determines the binding degree of the crown breadth.

In one embodiment, as shown in fig. 4-6, the outer ring 20 is provided with a snap 22, the snap 22 being conventional and available on demand. In normal use, the brush has many small branches that support upwards, and even if the restraint is not completely engaged, the brush will not fall off. The inner ring adjusting structure includes a plurality of movable blocks slidably connected to the inner sidewall of the outer ring 20, and the movable blocks are connected to each other by a first elastic member 35. When the outer ring 20 is configured to be opened and closed, at least two adjacent movable blocks in the inner ring adjusting structure are not connected through the first elastic member 35 (fig. 4 is such an arrangement). And a limiting structure for the relative movement of the movable block and the outer ring 20 is arranged between the movable block and the outer ring 20. The limit structure can be a limit pin structure. The method specifically comprises the following steps: holes for installing limit pins are correspondingly formed in the movable block and the outer ring 20, and when the relative movement between the movable block and the outer ring 20 needs to be limited, the limit pins are knocked in, so that the movable block and the outer ring 20 are fixed.

Each movable block comprises a movable block base 31 close to the inner ring side and a movable block top cover 32 close to the outer ring side, and the width of the movable block top cover 32 is larger than that of the movable block base 31; the inner side wall of the outer ring 20 is provided with a sliding groove 30 for accommodating the movable block to slide on the outer ring 20, the width of the movable block top cover 32 is larger than that of the sliding groove 30, and the width of the movable block base 31 is smaller than that of the sliding groove 30.

Under one embodiment, the limiting structure is specifically as follows: on two at least adjacent movable blocks, set up first limit structure relatively. Two adjacent movable blocks provided with the first limiting structures are not connected through the first elastic part 35. First limit structure is including running through the stopper 33 that sets up inside the movable block, be the L type, the horizontal one end of stopper 33 runs through and protrudes the movable block base 31 side, the bottom of the horizontal one end of stopper 33 is fixed inside the movable block base 31 through second elastomeric element 34, the vertical one end of stopper 33 runs through and protrudes movable block top cap 32, extends to in the 20 inside walls of outer loop. A plurality of limiting grooves 21 for accommodating the longitudinal ends of the limiting blocks 33 are arranged at corresponding positions on the inner side wall of the outer ring 20, and when the limiting blocks 33 are in a natural state, the tops of the limiting blocks 33 are positioned in the limiting grooves 21 to limit the relative movement between the movable blocks and the outer ring 20; the limiting block 33 is extruded towards the inner ring direction until the limiting block 33 leaves the limiting groove 21, and the movable block and the outer ring 20 can move relatively.

The elasticity of the first elastic part 35 is greater than the gravity of each movable block, and the elasticity of the second elastic part 34 is greater than the gravity of the limiting block 33. Namely: the first and second elastic members 35 and 34 have a certain rigidity, and do not significantly fall and deform under the natural gravity of each movable block and the limiting block 33.

The preferable scheme is as follows: the inner ring of the inner ring adjusting structure is elastically connected with a circle of elastic mesh enclosure 40, and the center of the mesh enclosure 40 is provided with a center hole for accommodating the bush crown. The mesh cover 40 is disposed in a manner similar to that of the first embodiment, except that the mesh cover 40 is not completely rotated, but is correspondingly provided with a gap so that the mesh cover 40 moves along with the movement of the outer ring 20 and the movable block. The mesh cover 40 is provided with a bonding structure 50, such as two sides of a hook and loop fastener, at a separate position, so that the mesh cover 40 can be correspondingly bonded when the outer ring 20 is fastened. Only one side of the magic tape is shown in figure 1, and the other side is on the back side and cannot be seen in the figure.

The mesh cover 40 and each of the movable block bases 31 may be connected by a conventional fixing method, and the mesh cover 40 may be connected only to the movable block bases 31 and not to the first elastic member 35. If the mesh enclosure 40 and the first elastic member 35 need to be connected, a layer of elastic cloth 41 may be disposed on one side of the first elastic member 35 close to the mesh enclosure 40, the first elastic member 35 is fixed (e.g., glued) to the elastic cloth 41, and the elasticity of the elastic cloth 41 is greater than or equal to that of the first elastic member 35. The net cover 40 is connected with the elastic cloth 41.

The more preferable scheme is as follows: the outer ring 20 is externally and symmetrically provided with a plurality of soft rods 10, the soft rods 10 can rotate universally and stretch and compress longitudinally, and can be automatically shaped after rotating, stretching and compressing to a required position, so that the force of the rotation, stretching and compression of the soft rods 10 is greater than the gravity of the restraint device. The arrangement and the purpose of the soft rod 10 are the same as those of the first embodiment, and are not described in detail.

The techniques provided by the present invention are further illustrated below with reference to specific embodiments.

Example (b): display for regulating and controlling crown width effect of high mountain willow shrubs

Examples embodiment environment introduction: is implemented in the park of Miyaura Francolini mountain, Kyoho, China, Abu, Kangzuo, Sichuan province. The park (31 degrees 24'-31 degrees 55' N, 102 degrees 35'-103 degrees 4' E, altitude 3700-. The regional climate is influenced by the plateau shape and belongs to seasonal high mountain climate which is warm in winter and cool in summer, the annual average temperature is 6-9 ℃, the average temperature in the hottest month (7 months) is 12.6 ℃, the average temperature in the coldest month (1 month) is-8 ℃, the sunlight is strong and cold and dry, the wind is strong, the frost period is about 200 days, the annual rainfall is 700-fold, and the annual evapotranspiration is 1000-fold, wherein the weather is 1900 mm. The soil type is mountain dark brown soil, the matrix of the mature soil mainly comprises residual weathered substances such as phyllite, slate, dolomite and the like, the soil layer is thin, and the content of gravel is high. After the large-scale artificial cutting of the leaves in the second half of the 20 th century, a natural recovery succession sequence of 'grassland-shrub-secondary birch-original conifer' is formed on the cut land, and large-area secondary shrubs are distributed in the cut land, mainly comprising Salix alpina (Salix cubularis), fresh inferior flowers (Sibiraea laevigata), Rhododendron (Rhododendron simsii), Spiraea crispa (Spiraea salicifolia) and the like, so that the growth and the renewal of tree seedlings of a group built under the shrub are inhibited.

1. 76 alpine willow shrubs with obviously closed crowns are selected in the Miyaoluo partridge park in 2018, 5 months, and at least 1 coniferous tree seedling is guaranteed to be established under each shrub, wherein 24 are control groups (marked as CK), and the other 52 are test groups which are set with 3 treatments. The basic information (plant number, height, crown width and the like) of the 76 bush shrubs is investigated, and the investigation data is used as a comparison reference after regulation and control.

The test treatment of 52 clumps of the test group was carried out in the non-growing season of coniferous colonized tree seedlings, with 15 clumps being subjected to manual horizontal removal 1/2 clump canopy width treatment (labeled: 1/2H), 20 clumps being subjected to horizontal constraint of about 1/2 clump canopy width treatment (labeled: 1/2S) using the constraint device of the present invention, and 17 clumps being subjected to total shrub canopy width removal treatment (labeled: 1). All treatments were based on the removal of the regeneration restriction of the growth of the seedlings of the established tree species. Respectively listing and marking.

2. And (5) respectively surveying the growth conditions (height, base diameter and crown width) of the seedlings under the controlled 76 shrubs in 11 months and 9 months (after the growth season of the seedlings is finished) in 2018 and 2019, and calculating the growth amount of the seedlings. The test bush implementing the above control scheme was compared with Control (CK) bush data using basal diameter and seedling height growth as the main indicators. The data comparison results show that: seedlings of coniferous established tree species after 1/2S conditioning showed higher growth renewal capacity, while the seedlings grew the slowest under 1 treatment. In the embodiment, the specific time period of 6 months is 5 months to 11 months in 2018; the specific time period of 10 months is 11 months to 9 months in 2018. Specific data are shown in table 1.

TABLE 1 renewal test data statistics for promoting growth of seedlings of clustered trees by regulating and controlling crown width of salix integra

The described embodiments are only for describing the preferred mode of the present invention, and are not to be construed as limiting the scope of the present invention, and those skilled in the art should make various changes, modifications, alterations, and substitutions on the technical solution of the present invention without departing from the spirit of the present invention, which is defined by the claims.

Claims (10)

1. A method for promoting growth and renewal of a colonizing tree species, comprising: the canopy width of the bush is removed or constrained, either entirely or partially.

2. The method of claim 1, wherein the method further comprises: the canopy of the shrub is removed or constrained 1/2.

3. A bush crown width restraint device is characterized in that: the restraint device is annular and comprises an inner ring adjusting structure capable of adjusting the diameter of an inner ring, and the outer ring of the inner ring adjusting structure is connected with an outer ring (20) with a constant diameter.

4. The brushcrown web restraint of claim 3, wherein: the outer ring (20) is a whole, and the inner ring adjusting structure comprises a plurality of fastening structures which are arranged on the outer ring (20) in a penetrating way; the fastening structure comprises a positioning pin (51), wherein a part of the positioning pin (51) is inserted into the outer ring (20), is in clearance fit with the outer ring (20), can perform linear reciprocating motion relative to the outer ring (20), and can be fixed with the outer ring (20) under the action of the limiting structure;

the outer surface of the longitudinal bottom of the positioning pin (51) is fixedly connected with a third elastic component (54), and the other end of the third elastic component (54) penetrates through the outer ring (20) and is connected with a fastening block (55).

5. The brushcrown web restraint of claim 4, wherein: the locating pin (51) is T-shaped, one longitudinal part of the locating pin (51) is inserted into the outer ring (20), the transverse part of the locating pin protrudes out of the outer surface of the outer ring (20), the locating pin (51) is hollow, a limiting rod (52) penetrates through the inside of the locating pin (51), one end of the limiting rod (52) protrudes out of the outer surface of the transverse part of the locating pin (51), the other end of the limiting rod is positioned inside the longitudinal part of the locating pin (51), the limiting rod (52) is positioned inside the locating pin (51) and fixedly connected with a rubber lug (53), the lug (53) is vertical to the limiting rod (52), a plurality of first limiting grooves (23) for accommodating the lug (53) are correspondingly arranged inside the outer ring (20), and a plurality of,

in a natural state, the bump (53) penetrates through the positioning pin (51) and is clamped into the first limiting groove (23) to limit the relative movement of the positioning pin (51) and the outer ring (20); the limiting rod (52) is extruded, the protruding block (53) exits the first limiting groove (23) and enters the positioning pin (51), and the positioning pin (51) can perform linear reciprocating motion relative to the outer ring (20).

6. The brushcrown web restraint of claim 3, wherein: the outer ring (20) is of an openable structure, the inner ring adjusting structure comprises a plurality of movable blocks which are connected to the inner side wall of the outer ring (20) in a sliding mode, at least one pair of adjacent movable blocks are not connected, and the rest movable blocks are connected through a first elastic component (35);

a limiting structure for the relative movement of the movable block and the outer ring (20) is arranged between the movable block and the outer ring (20).

7. The brushcrown web restraint of claim 6, wherein: each movable block comprises a movable block base (31) close to the inner ring side and a movable block top cover (32) close to the outer ring side, and the width of each movable block top cover (32) is larger than that of each movable block base (31);

the inner side wall of the outer ring (20) is provided with a sliding groove (30) for accommodating the movable block to slide in the outer ring (20), the width of the movable block top cover (32) is larger than that of the sliding groove (30), and the width of the movable block base (31) is smaller than that of the sliding groove (30).

8. The brushcrown web restraint of claim 6, wherein: the first limiting structures are oppositely arranged on at least two adjacent movable blocks, and a first elastic part (35) is not arranged between the two movable blocks which are oppositely provided with the first limiting structures;

the first limiting structure comprises a limiting block (33) which is arranged inside the movable block in a penetrating mode and is L-shaped, one transverse end of the limiting block (33) penetrates through and protrudes out of the side face of the movable block base (31), the bottom of one transverse end of the limiting block (33) is fixed inside the movable block base (31) through a second elastic part (34), and one longitudinal end of the limiting block (33) penetrates through and protrudes out of the movable block top cover (32) and extends into the inner side wall of the outer ring (20);

a plurality of limiting grooves (21) for accommodating the longitudinal ends of the limiting blocks (33) are formed in the inner side wall of the outer ring (20) in corresponding positions, when the limiting blocks (33) are in a natural state, the tops of the limiting blocks (33) are located in the limiting grooves (21), and the movable blocks and the outer ring (20) are limited to move relatively; the limiting block (33) is extruded towards the inner ring direction until the limiting block (33) leaves the limiting groove (21), and the movable block and the outer ring (20) can move relatively.

9. The brushcrown web restraint of claim 3, wherein: the inner ring of the inner ring adjusting structure is elastically connected with a circle of elastic mesh enclosure (40), and the center of the mesh enclosure (40) is provided with a center hole for accommodating the shrub crown breadth.

10. The brushcrown web restraint of claim 3, wherein: the outer ring (20) is externally and symmetrically provided with a plurality of soft rods (10), the soft rods (10) can rotate universally and stretch and compress longitudinally, and can be automatically shaped after rotating, stretching and compressing to a required position, so that the force generated by rotating, stretching and compressing the soft rods (10) is greater than the gravity of the restraint device.

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