CN116114545A - A Method of Reconstructing Vegetation Layer Using Turf with Different Disturbance Degrees - Google Patents

Abstract

The invention discloses a method for reconstructing a plant growth layer by using grass with different disturbance degrees, which comprises the following steps: (1) Selecting and determining a turf peeling accumulation area and a re-paving area, and selecting turf with different stacking time in the turf peeling accumulation area for subsequent reconstruction of a plant-growing layer; (2) Crushing the turf blocks with different stacking times in the step (1) by using a crusher, sieving by using a 2mm sieve, and mixing with a modified organic material and vegetation seeds to prepare mixed slurry; (3) The mixed slurry in the step (2) is paved back to the paving-back area studied in the step (1) to form a plant growth layer with a certain thickness, so that the problems of complex construction process and high management and maintenance difficulty in the prior art are solved.

Description

A Method of Reconstructing Vegetation Layer Using Turf with Different Disturbance Degrees

technical field

The invention relates to the technical field of alpine meadow ecological restoration, in particular to a method for reconstructing a vegetation layer using turf with different disturbance degrees.

Background technique

As my country pays more and more attention to the protection of the ecological environment, there is an increasingly strong demand for the technology of reconstructing the vegetation layer using freshly stripped turf and stripped turf disturbed to varying degrees.

Due to the increasing demand for reuse of stripped turf, some scholars have proposed in recent years to predict the change of turf stacking activity according to the season of turf stripping and stacking, and use geocells with side holes as the skeleton support material to slow down the decay of activity When paving, tamp the slope, lay humus, base fertilizer, and turf from bottom to top, and correct the thickness to make the paving surface flush. The construction process of this scheme is complicated; some scholars have also proposed that the turf protection level should be delineated according to the natural vegetation type and coverage, and the vegetation recovery level should be delineated according to rainfall, temperature and soil factors. Different turf excavation and protection processes are used in the control section to maximize the protection of stripped turf. As mentioned above, it can be seen that the focus of current research on the reuse of stripped turf is mostly on the management and maintenance of the stripped turf, so that it can still meet the needs of plant germination and growth within a period of time after stripping.

Contents of the invention

The invention provides a method for reconstructing the vegetation layer by using turf with different disturbance degrees, and solves the problems of complicated construction technology and difficult management and maintenance in the prior art.

In order to solve this technical problem, the present invention provides following technical scheme:

The method for reconstructing the vegetation layer using turf with different disturbance degrees comprises the following steps:

(1) Select and determine the stripped turf accumulation area and the resurfacing area, and select turf with different stacking times in the stripped turf accumulation area for subsequent reconstruction of the vegetation layer;

(2) the turf blocks of different stacking times in the step (1) are broken with a crusher, passed through a 2mm sieve, mixed with modified organic materials and vegetation seeds, and made into mixed slurry soil;

(3) Back-pave the mixed slurry soil in step (2) to the back-paving area surveyed in step (1) to form a vegetation layer of a certain thickness.

Most of the existing vegetation layer reconstruction technologies use turf to directly cover back. The present invention uses a large number of stripped turf affected by different degrees of disturbance in actual projects and combines modified organic materials with good soil-fixing ability to reconstruct the vegetation layer. It meets the requirements of ecological and environmental protection; the use of modified organic materials can make the substrate of the vegetation layer more water- and fertilizer-retaining, which is more conducive to the germination and growth of plants; the compounding of materials is simple, and it is easy to popularize and apply.

Preferably, the turf selected in step (1) is a turf block whose stacking time is 210d, 180d, 90d or 1d after stripping. The turf is the turf that has been peeled off from the alpine meadow area and stored for different periods of time. It is crushed by a crusher and sieved as a growth substrate.

Preferably, the modified organic material is a mixed solution of sodium carboxymethyl cellulose and chitosan.

The modified organic material used in the present invention is composed of two kinds of high polymers, which bond the soil through physical and chemical grafting and crosslinking, and improve soil microbial diversity and enzyme activity by improving soil physical and chemical properties, which are environmentally friendly, Degradable advantage.

Preferably, the mass fraction of the modified organic material in step (2) is 5.5%-10%, and the mass ratio of the modified organic material to the turf is 1:5-10 when the modified organic material is mixed with the broken turf.

Preferably, the dosage of seeds in step (2) is controlled at 20-30g per square meter.

Preferably, the vegetation seeds in step (2) are selected from the group consisting of native fescue, bluegrass and Artemisia annua in the Qinghai-Tibet Plateau.

Preferably, the ratio of plant seeds is tall fescue, bluegrass and artemisia = 3:3:1.

The plants used mainly include tall fescue, bluegrass and Artemisia annua, high-quality plants with short growth cycle and strong resistance to cold and drought, and the content used is matched in proportion.

Preferably, in the step (3), the thickness of the vegetation layer covered by the mixed slurry soil is 5-25cm.

Compared with the prior art, the present invention has the following advantages:

The invention reconstructs the vegetation layer by adopting turf with different disturbance degrees. In terms of raw materials, the turf that has been greatly disturbed and difficult to meet the needs of plant germination and growth can be improved and reused by adding a certain concentration of organic materials, and organic materials are environmentally friendly, degradable, and easy to compound. little impact;

The organic material used in the present invention is composed of two kinds of high polymers, which bond the soil through physical and chemical grafting and crosslinking, and improve soil microbial diversity and enzyme activity by improving soil physical and chemical properties, which are environmentally friendly and degradable The advantages. The turf is the turf that has been peeled off from the alpine meadow area and stored for different periods of time. It is crushed by a crusher and sieved as a growth substrate. The plants used mainly include tall fescue, bluegrass and Artemisia annua, local high-quality plants with short growth cycle and strong resistance to cold and drought.

Most of the existing vegetation layer reconstruction technologies use turf to cover directly. The present invention utilizes a large number of stripped turf affected by different degrees of disturbance in actual projects and combines the reconstructed vegetation layer with good soil-fixing ability, which meets the requirements of ecological and environmental protection. ; The use of organic materials can make the substrate of the vegetation layer more water- and fertilizer-retaining, which is more conducive to the germination and growth of plants; the compounding of materials is simple, and it is easy to popularize and apply.

The method of this scheme can use the turf disturbed to different degrees to reconstruct the vegetation layer suitable for vegetation growth in the alpine area, and can effectively restore the alpine meadow ecosystem that has been destroyed by man and naturally degraded. It is easy to operate, low in operation cost and ecologically zero-pollution . It is of great significance to the ecological restoration and sustainable development of the alpine meadow ecosystem. In terms of practical application, the technical process of the present invention is relatively short, the demand for large machinery is small, and the investment cost is low.

Description of drawings

The drawings described here are used to provide a further understanding of the embodiments of the present invention, constitute a part of the application, and do not limit the embodiments of the present invention. In the attached picture:

Fig. 1 is the flow chart of the implementation of the method for reconstructing the vegetation layer by using turf with different disturbance degrees according to the present invention.

Figure 2 is a comparison chart of the vegetation germination rate between the turf reconstituted vegetation layer and the control group after stripping time 1d.

Fig. 3 is a comparison chart of the height of the seedlings of the turf reconstituted vegetation layer and the control group at the stripping time of 1 day.

Fig. 4 is a comparison chart of the vegetation germination rate of the turf reconstituted vegetation layer and the control group at a stripping time of 90 days.

Fig. 5 is a comparison chart of the height of the seedlings of the turf reconstituted vegetation layer and the control group at a stripping time of 90 days.

Figure 6 is a comparison chart of the vegetation germination rate between the 180d turf reconstituted vegetation layer and the control group after the stripping time.

Fig. 7 is a comparison chart of the height of the seedlings of the reconstituted vegetative layer of the turf and the control group at a stripping time of 180 days.

Fig. 8 is a comparison chart of the vegetation germination rate of the turf reconstituted vegetation layer and the control group at a stripping time of 210 days.

Fig. 9 is a comparison chart of the height of the seedlings of the turf reconstituted vegetation layer and the control group at a stripping time of 210 days.

Fig. 10 is a comparison chart of the aboveground biomass of the turf reconstituted vegetation layer and the control group after backlaying for 30 days at different stripping times.

Figure 11 is a comparison chart of the chlorophyll content of the turf reconstituted vegetation layer and the control group after 30 days of backlaying at different stripping times.

Figure 12 is a comparison chart of the soil moisture content of the turf reconstituted vegetation layer at different stripping times and the control group after 30 days of back-laying and the control group before back-laying.

Figure 13 is a comparison chart of the soil pH of the turf reconstituted vegetation layer and the control group after 30 days of back-laying and before back-laying of the control group at different stripping times.

Detailed ways

In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail in conjunction with the following examples. The schematic embodiments of the present invention and their descriptions are only used to explain the present invention, and are not intended as a guideline for the present invention. limit.

Example 1

In this example, the turf that was stripped and piled up in the Ya'an-Nyingchi section of the Sichuan-Tibet line was selected as the research object. After being crushed by a crusher and passed through a 2mm sieve, the modified organic material with a concentration of 10% and the vegetation seeds with strong stress resistance are added and mixed directly. Mix the above materials into paste soil and pave it back to the paved area determined in the previous investigation.

The turf is crushed and sieved by the crusher to remove stones, residual branches, garbage and other sundries. The mass ratio of the modified organic material to the turf is 1:8; the modified organic material is a mixture of sodium carboxymethyl cellulose and chitosan with a mass ratio of 1:1. Vegetation seeds are cold-resistant and drought-resistant high-quality forages such as tall fescue, bluegrass and Artemisia annua. The ratio of plant seeds is tall fescue, bluegrass and Artemisia annua = 3:3:1, and the quality of seeds per square meter of vegetation layer substrate is guaranteed 20-30g. The thickness of the vegetation layer formed by back-laying is controlled at 5-20cm to meet the basic requirements of vegetation root development, vegetation germination and growth.

The modified organic material with a concentration of 5.5% was used instead of the modified organic material with a concentration of 10% to carry out the above parallel test, and a control test was carried out without adding the modified organic material with a concentration of 0%. The consideration indicators are vegetation germination rate, seedling height, aboveground biomass, chlorophyll content, soil moisture content, and pH. The data obtained were derived from triplicate analyses.

Example 2

In this example, the turf piled up after the stripping of the CZXZZQ-14B section of the Sichuan-Tibet line from Ya’an to Nyingchi was selected as the research object. As shown in Figure 1, according to the investigation of the stripped turf accumulation area and the resurfacing area, the accumulation time was selected in the stripped turf accumulation area The 90d turf is crushed by a crusher and passed through a 2mm sieve, and the modified organic material with a concentration of 10% and vegetation seeds with strong stress resistance are added. Mix the above materials into paste soil and pave it back to the paved area determined in the previous investigation.

The turf is crushed and sieved by the crusher to remove stones, residual branches, garbage and other sundries. The mass ratio of the modified organic material to the turf is 1:8; the modified organic material is a mixture of sodium carboxymethyl cellulose and chitosan with a mass ratio of 1:1. Vegetation seeds are cold-resistant and drought-resistant high-quality forages such as tall fescue, bluegrass and Artemisia annua. The ratio of plant seeds is tall fescue, bluegrass and Artemisia annua = 3:3:1, and the quality of seeds per square meter of vegetation layer substrate is guaranteed 20-30g. The thickness of the vegetation layer formed by back-laying is controlled at 5-20cm to meet the basic requirements of vegetation root development, vegetation germination and growth.

The modified organic material with a concentration of 5.5% was used instead of the modified organic material with a concentration of 10% to carry out the above parallel test, and a control test was carried out without adding the modified organic material with a concentration of 0%. The consideration indicators are vegetation germination rate, seedling height, aboveground biomass, chlorophyll content, soil moisture content, and pH. The data obtained were derived from triplicate analyses.

Example 3

In this example, the turf piled up after the stripping of the CZXZZQ-14B section of the Sichuan-Tibet line from Ya’an to Nyingchi was selected as the research object. As shown in Figure 1, according to the investigation of the stripped turf accumulation area and the resurfacing area, the accumulation time was selected in the stripped turf accumulation area The 180d turf is crushed by a crusher and passed through a 2mm sieve, and then 10% modified organic materials and vegetation seeds with strong stress resistance are added. Mix the above materials into paste soil and pave it back to the paved area determined in the previous investigation.

The turf is crushed and sieved by the crusher to remove stones, residual branches, garbage and other sundries. The mass ratio of the modified organic material to the turf is 1:8; the modified organic material is a mixture of sodium carboxymethyl cellulose and chitosan with a mass ratio of 1:1. Vegetation seeds are cold-resistant and drought-resistant high-quality forages such as tall fescue, bluegrass and Artemisia annua. The ratio of plant seeds is tall fescue, bluegrass and Artemisia annua = 3:3:1, and the quality of seeds per square meter of vegetation layer substrate is guaranteed 20-30g. The thickness of the vegetation layer formed by back-laying is controlled at 5-20cm to meet the basic requirements of vegetation root development, vegetation germination and growth.

The modified organic material with a concentration of 5.5% was used instead of the modified organic material with a concentration of 10% to carry out the above parallel test, and a control test was carried out without adding the modified organic material with a concentration of 0%. The consideration indicators are vegetation germination rate, seedling height, aboveground biomass, chlorophyll content, soil moisture content, and pH. The data obtained were derived from triplicate analyses.

Example 4

In this example, the turf piled up after the stripping of the CZXZZQ-14B section of the Sichuan-Tibet line from Ya’an to Nyingchi was selected as the research object. As shown in Figure 1, according to the investigation of the stripped turf accumulation area and the resurfacing area, the accumulation time was selected in the stripped turf accumulation area The 210d turf is crushed by a crusher and passed through a 2mm sieve, and then 10% modified organic materials and vegetation seeds with strong stress resistance are added. Mix the above materials into paste soil and pave it back to the paved area determined in the previous investigation.

The turf is crushed and sieved by the crusher to remove stones, residual branches, garbage and other sundries. The mass ratio of the modified organic material to the turf is 1:8; the modified organic material is a mixture of sodium carboxymethyl cellulose and chitosan with a mass ratio of 1:1. Vegetation seeds are cold-resistant and drought-resistant high-quality forages such as tall fescue, bluegrass and Artemisia annua. The ratio of plant seeds is tall fescue, bluegrass and Artemisia annua = 3:3:1, and the quality of seeds per square meter of vegetation layer substrate is guaranteed 20-30g. The thickness of the vegetation layer formed by back-laying is controlled at 5-20cm to meet the basic requirements of vegetation root development, vegetation germination and growth.

The modified organic material with a concentration of 5.5% was used instead of the modified organic material with a concentration of 10% to carry out the above parallel test, and a control test was carried out without adding the modified organic material with a concentration of 0%. The consideration indicators are vegetation germination rate, seedling height, aboveground biomass, chlorophyll content, soil moisture content, and pH. The data obtained were derived from triplicate analyses.

Figures 2 and 3 are respectively the comparison charts of the vegetation germination rate and seedling height of the turf reconstituted vegetation layer and the control group in the stripping time 1d of Example 1. It can be seen from Figures 2 and 3 that compared with the control group, the vegetation germination rate and seedling height of the reconstituted vegetation layer of turf that was less disturbed after stripping for 1 day had little change.

Figures 4 and 5 are respectively the comparison charts of the vegetation germination rate and the height of the seedlings of the turf reconstituted vegetation layer and the control group in Example 2 stripping time 90d. It can be seen from Figures 4 and 5 that compared with the control group, the vegetation germination rate and seedling height of the reconstituted vegetation layer of the turf with a peeling time of 90 days, which is moderately disturbed, have little change.

Figures 6 and 7 are the comparison charts of the vegetation germination rate and seedling height of the 180d turf reconstituted vegetation layer and the control group in Example 3, respectively. It can be seen from Figures 6 and 7 that the vegetation germination rate and seedling height of the turf reconstituted vegetation layer are better than those of the control group when the turf reconstituted vegetation layer was disturbed for 180 days after the stripping time was 180 days. % Concentration modified organic material turf reconstructed vegetation layer had the best effect on the improvement of vegetation germination rate and seedling height.

Figures 8 and 9 are the comparison charts of the vegetation germination rate and seedling height of the turf reconstituted vegetation layer and the control group at the stripping time of 210d in Example 4 and the control group respectively. As can be seen from Figures 8 and 9, the stripping time of 210d, that is, the complete disturbance of the turf reconstruction vegetation layer compared with the control, the vegetation germination rate and seedling height of the turf reconstruction vegetation layer are all better than the control group, wherein 10% concentration of modified The reconstruction of vegetation layer by turf with sexual organic materials has the best effect on the improvement of vegetation germination rate and seedling height.

Fig. 10 is a comparison chart of the aboveground biomass of the turf reconstituted vegetation layer and the control group after backlaying for 30 days at different stripping times in Examples 1-4. As can be seen from Figure 10, the turf with a longer peeling time (> 180d), that is, the turf with a greater degree of disturbance, compared with the control, the 30d above-ground biomass of the turf reconstituted vegetation layer is better than the control group. The reconstituted vegetation layer of turf with sexual organic materials has the best effect on the improvement of aboveground biomass at 30 days; and for the turf with a shorter stripping time (<90d) that is less disturbed compared with the control, the 30d aboveground biomass of the reconstituted vegetation layer of turf Biomass did not change much compared to the control.

Figure 11 is a comparison chart of the chlorophyll content of the turf reconstituted vegetation layer and the control group after 30 days of backlaying at different stripping times. It can be seen from Figure 11 that the 30d chlorophyll content of the turf reconstituted vegetation layer is better than that of the control group when the turf with a long peeling time (> 180d), that is, the turf with a large degree of disturbance is compared with the control group. The 30d chlorophyll content of the turf reconstructed vegetation layer of organic materials has the best effect on improving the 30d chlorophyll content; and for the turf with a shorter stripping time (<90d) that is less disturbed compared with the control, the 30d chlorophyll content of the turf reconstructed vegetation layer is the same as that of the control. There was little change compared to the control.

Figure 12 is a comparison chart of the soil moisture content of the turf reconstituted vegetation layer at different stripping times and the control group after 30 days of back-laying and the control group before back-laying. It can be seen from Figure 12 that the soil moisture content can be effectively increased by using modified organic materials to improve the turf reconstruction vegetation layer, and the turf reconstruction vegetation layer with 10% concentration of modified organic materials has the best effect on improving soil moisture content. good.

Figure 13 is a comparison chart of the soil pH of the turf reconstituted vegetation layer and the control group after 30 days of back-laying and before back-laying of the control group at different stripping times. It can be seen from Figure 13 that by using modified organic materials to improve the turf and reconstruct the vegetation layer, the soil pH can be reduced, the soil acidity can be slightly increased, and the soil pH is more suitable for vegetation germination and growth.

The specific embodiments described above have further described the purpose, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above descriptions are only specific embodiments of the present invention and are not intended to limit the scope of the present invention. Protection scope, within the spirit and principles of the present invention, any modification, equivalent replacement, improvement, etc., shall be included in the protection scope of the present invention.

Claims (8)

1. The method for reconstructing the plant growth layer by using the grass with different disturbance degrees is characterized by comprising the following steps:

(1) Selecting and determining a turf peeling accumulation area and a re-paving area, and selecting turf with different stacking time in the turf peeling accumulation area for subsequent reconstruction of a plant-growing layer;

(2) Crushing the turf blocks with different stacking times in the step (1) by using a crusher, sieving by using a 2mm sieve, and mixing with a modified organic material and vegetation seeds to prepare mixed slurry;

(3) And (3) paving the mixed slurry in the step (2) back to the paving-back area studied in the step (1) to form a plant-growing layer with a certain thickness.

2. The method of claim 1, wherein the turf selected in step (1) is a piece of turf having a post-peeling stack time of 210d, 180d, 90d or 1 d.

3. The method for reconstructing a plant growth layer by using grass with different disturbance degrees according to claim 1, wherein the components of the modified organic material are mixed solution of sodium carboxymethyl cellulose and chitosan.

4. A method of reconstructing a plant-growing layer from grass of varying degrees of turbulence according to claim 3, wherein the mass fraction of modified organic material in step (2) is 5.5% -10% and the mass ratio of modified organic material to turf when mixed with crushed turf is 1:5-10.

5. The method for reconstructing a plant-growing layer using grass of varying degrees of disturbance according to claim 1, wherein the amount of seeds used in step (2) is controlled to be 20-30g per square meter.

6. The method of reconstructing a plant growing layer from grass of varying degrees of turbulence according to claim 1, wherein the vegetation seeds in step (2) are selected from the group consisting of native festuca arundinacea, poa pratensis and artemisia annua.

7. The method of reconstructing a plant-growing layer from grass of varying degrees of turbulence according to claim 6, characterized in that the ratio of plant seeds is festuca arundinacea, poa pratensis and sand sagebrush = 3:3:1.

8. the method for reconstructing a plant-growing layer using grass of different disturbance degrees according to claim 1, wherein the thickness of the plant-growing layer of the mixed slurry back-laid in the step (3) is 5-25cm.

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