Method for improving strong-basicity red gum clay and restoring vegetation under photovoltaic panel and application of method for improving strong-basicity red gum clay and restoring vegetation under photovoltaic panel

Abstract

The invention discloses a method for improving strong-basicity red gum clay and recovering vegetation under a photovoltaic panel and application. The method comprises the following steps: selecting a proper planting site; soil covering and fertilization are conducted on the planting site, and then a soil conditioner is applied for soil improvement; plants which are drought-resistant, cold-resistant, saline-alkaline-tolerant, shade-tolerant and high in adaptive capacity are selected for matching and mixed sowing; field management and pest control. According to the method, the strongly basic red gum clay under the photovoltaic panel in the northwest arid region is improved by means of plant planting, soil covering, fertilizer applying and soil conditioner applying, hardening is broken and removed, the strongly basic red gum clay is suitable for vegetation growth, and the purpose of ecological restoration is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of ecological restoration, and in particular to a method and application of improving strongly alkaline red clay and restoring vegetation under a photovoltaic panel. Background Art

[0002] In order to strictly adhere to the red line of ecological environmental protection and make scientific and rational use of climate resources, when constructing new energy sites such as photovoltaic power generation and wind power generation, only deserts, sandy land, Gobi, saline-alkali land, mines, solid waste storage sites, ash fields and other places with relatively low land prices and low utilization rates can be selected in the north. How to comprehensively manage the ecology of these areas, and at the same time carry out supporting soil improvement, and restore the agricultural and pastoral and grassland productivity of land resources in new energy sites is an important new research and development topic in agriculture, animal husbandry, forestry, ecology and environmental science today. In the construction of photovoltaic panels, it is necessary to propose suitable soil improvement methods based on the limitations of the height of photovoltaic panels and the characteristics of the land used for photovoltaic panel construction. Summary of the invention

[0003] The present invention aims to solve one of the technical problems in the related art at least to a certain extent.

[0004] To this end, an embodiment of the present invention provides a method for improving and restoring vegetation in strongly alkaline red clay under photovoltaic panels.

[0005] In a first aspect, the present invention provides a method for improving and restoring vegetation of strongly alkaline red clay under photovoltaic panels, comprising the following steps:

[0006] (a) Select a suitable planting site;

[0007] (b) first covering the planting site with soil and applying fertilizer, and then applying a soil conditioner to improve the soil;

[0008] (c) Select plants that are drought-resistant, cold-resistant, salt-tolerant, shade-tolerant, and highly adaptable for mixed planting;

[0009] (d) Field management and pest control.

[0010] Furthermore, in step (a), the suitable planting site is a strongly alkaline red clay soil under the photovoltaic panel with a gentle terrain, flat ground, ventilation and sunshine, drought and little rain, and a pH value of 8.5 to 8.77.

[0011] Furthermore, in step (b), the soil components of the covering soil include northwest desert sandy soil, farmyard manure and rice husks in a mass ratio of 5:2:1, and the thickness of the covering soil is 10 to 12 cm.

[0012] Furthermore, in step (b), the fertilizer used for fertilization includes trace element chelated fertilizer, medium trace element fertilizer, organic fertilizer, compound fertilizer potassium sulfate and biological bacterial fertilizer in a mass ratio of 1:4:6:4:4, and the fertilizer application rate is 900-1000g / m 2 / Year.

[0013] Furthermore, in step (b), the soil conditioner comprises mineral potassium humate, high-efficiency water-soluble humic acid, and Junliqing powder in a mass ratio of 10:1:3, and the application amount of the soil conditioner is 350-450 g / m 2 .

[0014] Furthermore, the plants include oats, thin wheat grass, alkali grass, fine limonium, camel wormwood, buffalo bluegrass, salt-tolerant moonlit night bluegrass and Speidel alfalfa in equal weight ratios, and the sowing rate is 26-30 g / m 2 The sowing depth is 1 to 2 cm, there is no spacing between rows and plants, and the seeds are sown evenly.

[0015] Furthermore, the field management comprises the following steps: covering the soil, applying fertilizers and improving agents, then watering the soil with fertilizer; 1 to 2 days later, tilling the soil to a depth of 13 to 15 cm, then watering the soil once; 1 to 2 days later, sowing the seeds, and watering the soil thoroughly after sowing; watering the soil every 3 to 5 days to promote germination and rooting; watering the soil every 6 to 7 days to promote seedling growth, and watering the soil with water for 3 to 5 times, with a seedling growth period of 22 to 26 days, and watering the soil every 26 to 30 days after the seedling growth has been established; watering the soil for tillering and branching when the seedlings are 12 to 15 cm tall, and then irrigating and watering the soil 1 to 2 times according to the soil moisture conditions, and watering the soil for wintering according to the weather conditions in early November; watering the soil for greening at the end of February of the second year, and watering the soil every 6 to 8 days for a total of 3 to 4 times according to the weather conditions, and then applying fertilizer and watering in time according to the seedling conditions and soil moisture conditions; and manually harvesting the seeds from mid-August to mid-October when the panicles and pods are light yellow-brown.

[0016] Furthermore, the pest control is to use 800-900 times diluted Junliqing (low toxicity) to control gray mold, sooty mold, rust, and seedling blight, spraying once a week for two consecutive weeks; use 500-600 times diluted 2.5% highly effective chlorfenapyr (low toxicity) to control locusts, aphids, armyworms, loopers, middle flower beetles, and flower bugs, spraying once a week for two consecutive weeks.

[0017] Furthermore, the nymph population density is greater than 10 heads / m 2 If the lesions are visible to the naked eye, use 400-500 times diluted 2.5% highly effective chlorfenapyr (low toxicity) for prevention and control, spray once a week for three consecutive weeks; if the lesions are visible to the naked eye, use 400-700 times diluted Junliqing (low toxicity) for prevention and control, spray once a week for three consecutive weeks.

[0018] In a second aspect, the present invention proposes the application of the method proposed in the first aspect in the restoration of vegetation in strongly alkaline red clay under photovoltaic panels in the arid region of Northwest China.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] The invention improves the strongly alkaline red clay under the photovoltaic panels in the arid areas of northwest China by means of plant planting, soil covering, fertilization and application of soil improver, breaks up the compaction to make it suitable for vegetation growth, and achieves the purpose of restoring ecology. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0022] Figure 1 The present invention is a flow chart of the method for improving the strongly alkaline red clay and restoring vegetation under the photovoltaic panel. DETAILED DESCRIPTION

[0023] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0024] The method for improving the strongly alkaline red clay and restoring vegetation under the photovoltaic panel of the present invention is described in detail below with reference to the accompanying drawings.

[0025] like Figure 1 As shown, the method for improving and restoring vegetation of strongly alkaline red clay under photovoltaic panels of the present invention comprises the following steps:

[0026] (a) Select a suitable planting site;

[0027] (b) first covering the planting site with soil and applying fertilizer, and then applying a soil conditioner to improve the soil;

[0028] (c) Select plants that are drought-resistant, cold-resistant, salt-tolerant, shade-tolerant, and highly adaptable for mixed planting;

[0029] (d) Field management and pest control.

[0030] Among them, in step (a), the suitable planting site is a strongly alkaline red clay under the photovoltaic panel with gentle terrain, flat ground, ventilation and sunshine, drought and little rain, and a pH value of 8.5 to 8.77. The strongly alkaline red clay under the photovoltaic panel is compacted, salinized, and is not suitable for vegetation growth due to the height limit of the photovoltaic panel, and needs to be improved.

[0031] In step (b), the soil components of the covering soil include northwest desert sandy soil, farmyard manure and rice husks in a mass ratio of 5:2:1, and the thickness of the covering soil is 10 to 12 cm.

[0032] The sandy soil in the northwest desert contains a lot of gravel, has a loose soil structure, weak water retention capacity, and lacks an obvious humus layer. Therefore, it is necessary to use farmers' decomposed fertilizers to increase fertility and rice husks to increase water retention capacity.

[0033] In step (b), the fertilizers used for fertilization include trace element chelated fertilizers, medium trace element fertilizers, organic fertilizers, compound fertilizer potassium sulfate and biological bacterial fertilizers in a mass ratio of 1:4:6:4:4, and the fertilizer application rate is 900-1000 g / m 2 / year, the application method is broadcasting.

[0034] Among them, trace element chelated fertilizers are fertilizers made of chelating agents and trace elements essential to plants (except boron and molybdenum), such as chelated zinc, chelated iron, chelated manganese, chelated copper, etc.

[0035] Medium and trace element fertilizers refer to organic and inorganic compounds that exist in low concentrations in plants or in the soil and can affect the growth, development and stress resistance of plants, such as nitrogen, phosphorus, sulfur, potassium, calcium, sodium, etc.

[0036] Biofertilizer is a new type of fertilizer biological product that uses the life activities of active microorganisms to provide crops with the nutrients they need. Biofertilizer is a low-carbon, pure natural, non-toxic, harmless, and pollution-free organic microbial agent that has the functions of improving soil fertility, increasing the number and activity of beneficial microorganisms in the soil, improving soil activation properties, and preventing soil compaction; it can also improve the soil's ability to retain fertilizer, water, and cold. Microorganisms rapidly reproduce to form beneficial bacterial communities that enhance crop disease resistance, increase organic matter in the soil, prevent pathogenic bacteria from invading, and reduce the growth of plant diseases and insect pests.

[0037] In step (b), the soil conditioner includes mineral potassium humate, high-efficiency water-soluble humic acid, and Junliqing powder in a mass ratio of 10:1:3, and the application amount of the soil conditioner is 350-450 g / m 2 The application method is broadcasting.

[0038] Among them, mineral humic acid is a water-soluble reddish-brown or gray-black powdery substance that can promote plant growth, plays an important role in drought resistance, can improve plant resistance to stress, and has the effect of increasing production and improving plant quality.

[0039] High-efficiency water-soluble humic acid is a type of organic matter that is created and accumulated from animal and plant remains, mainly plant remains, through the decomposition and transformation of microorganisms and a series of geochemical processes. It has the functions of increasing fertilizer efficiency, improving soil, stimulating crop growth, and improving the quality of agricultural products.

[0040] Junliqing is a comprehensive disease treatment agent that can deal with various fungal, bacterial and viral diseases, and can prevent and treat gray mold, sooty mold, rust, seedling blight, etc.

[0041] Through on-site investigation under photovoltaic panels, vegetation characteristics, soil testing, analysis, measurement, and experiments, it was found that the plant varieties suitable for the strong alkaline red clay under photovoltaic panels in the arid northwest region include oats, Elymus striata, Puccinellia tenuifolia, Limonium truncatum, Artemisia camel, Buffalo bluegrass, salt-tolerant moonlit night bluegrass, and Speidel alfalfa in equal mass ratios, with a sowing rate of 26-30 g / m 2 The sowing depth is 1 to 2 cm, there is no spacing between rows and plants, and the seeds are sown evenly.

[0042] Select drought-resistant, cold-resistant, salt-alkali-tolerant, shade-tolerant, grazing-tolerant plants with a plant height of about 40 cm and strong adaptability to rebuild a low lawn ground cover plant community close to the native vegetation, which is suitable for planting under photovoltaic panels. Plant according to soil conditions and take advantage of the characteristics of self-propagation and strong adaptability of plants. After the seeds mature and fall off, they can form seedlings in the same year under suitable conditions.

[0043] In step (d), the field management includes covering the soil, applying fertilizer, and applying the improver, then watering the soil for fertilization, watering the soil moisture content once after rotary tillage to a depth of 13 to 15 cm after 1 to 2 days, sowing after 1 to 2 days, and watering once after sowing; watering the soil for germination and root promotion every 3 to 5 days; watering the soil for seedling accelerator every 6 to 7 days, watering the soil for seedling accelerator 3 to 5 times, the seedling accelerator period is 22 to 26 days, and watering the soil every 26 to 30 days after seedling accelerator; watering the soil for tillering and branching when the seedlings are 12 to 15 cm tall, and then irrigating and watering the soil 1 to 2 times according to the soil moisture conditions, and watering the soil for wintering according to the weather conditions in early November; watering the soil for greening at the end of February of the second year according to the weather conditions, watering the soil every 6 to 8 days, and watering the soil 3 to 4 times in total, and then applying fertilizer and watering in time according to the seedling conditions and soil moisture conditions; and manually harvesting the seeds from mid-August to mid-October when the panicles and pods are light yellow-brown.

[0044] The pest control is to use 800-900 times diluted Junliqing (low toxicity) to control gray mold, sooty mold, rust, and seedling blight, spraying once a week for two consecutive weeks; use 500-600 times diluted 2.5% highly effective chlorfenapyr (low toxicity) to control locusts, aphids, armyworms, loopers, middle flower beetles, and flower bugs, spraying once a week for two consecutive weeks.

[0045] The nymph population density is greater than 10 / m 2If the lesions are visible to the naked eye, use 400-500 times diluted 2.5% highly effective chlorfenapyr (low toxicity) for prevention and control, spray once a week for three consecutive weeks; if the lesions are visible to the naked eye, use 400-700 times diluted Junliqing (low toxicity) for prevention and control, spray once a week for three consecutive weeks.

[0046] The present invention is described below in conjunction with specific embodiments.

[0047] Example 1

[0048] A planting site under the photovoltaic panels with gentle terrain, flat ground, good ventilation and sunshine was selected, and the planting area was demarcated. The average pH value of 10 soil samples tested was 8.65, and the average contents of hydrolyzable nitrogen, available phosphorus and fast-acting potassium were 6.45 mg / Kg, 4.56 mg / Kg and 33.88 mg / Kg respectively.

[0049] The planting area was covered with Northwest desert sand, farmyard manure and rice husks in a mass ratio of 5:2:1, with a covering thickness of 10 cm; the planting area was spread with trace element chelated fertilizer, medium and trace element fertilizer, organic fertilizer, compound fertilizer potassium sulfate and biological bacterial fertilizer in a mass ratio of 1:4:6:4:4, with a fertilizer application rate of 900 g / m 2 / year, apply mineral potassium humate, high-efficiency water-soluble humic acid, and Junliqing powder in a mass ratio of 10:1:3 in the planting area, and the application rate of soil conditioner is 350g / m 2 .

[0050] After covering the soil, applying fertilizer and amendment, water the soil once. After 1 day, till the soil to a depth of 13 cm, water the soil once. After 1 day, mix oats, Elytium wilfordii, Puccinellia tenuifolia, Limonium twigensis, Artemisia camel, Buffalo bluegrass, Salt-tolerant moonlit night bluegrass and Spedal alfalfa in equal weight ratio. The sowing rate of the plants is 26g / m 2 The sowing depth is 2cm, there is no spacing between rows and plants, and the seeds are sown evenly.

[0051] Water thoroughly after sowing; water once every 3 days to promote germination and root growth; water once every 6 days to help the seedlings grow slowly, water 5 times for a period of 24 days, and water every 26 days after the seedlings grow slowly; when the seedlings are 12cm to 15cm tall, water once for tillering and branching, then irrigate and water 1 to 2 times depending on the soil moisture conditions, and in early November, water for wintering depending on weather conditions; at the end of February of the second year, water for greening up depending on weather conditions, water every 6 days, for a total of 4 times, and then apply fertilizer and water in time according to the seedling condition and soil moisture conditions.

[0052] When pests and diseases occur during the growth of seedlings, use 800 times diluted Junliqing to control gray mold, sooty mold, rust, and seedling blight, spray once a week for two consecutive weeks; use 600 times diluted 2.5% highly effective chlorfenapyr to control locusts, aphids, armyworms, loopers, middle flower beetles, and flower fly, spray once a week for two consecutive weeks. The nymph population density is high, greater than 10 heads / m 2 If the lesions are visible to the naked eye, use 400 times diluted 2.5% highly effective chlorfenapyr solution for prevention and control, spray once a week for three weeks; if the lesions are visible to the naked eye, use 400 times diluted Junliqing solution for prevention and control, spray once a week for three weeks.

[0053] From mid-August to mid-October, seeds are harvested manually when the pods turn light yellow-brown. The harvested seeds are tested for pests and kept as seeds. In the greening season of the second year, the soil is fertilized and the scattered bald spots that have not turned green are improved and replanted. Maintenance continues for 5 years.

[0054] Example 2

[0055] A planting site under the photovoltaic panels with gentle terrain, flat ground, good ventilation and sunshine was selected, and the planting area was demarcated. The average pH value of 10 soil samples tested was 8.70, and the average contents of hydrolyzable nitrogen, available phosphorus and fast-acting potassium were 7.73 mg / Kg, 8.97 mg / Kg and 38.50 mg / Kg respectively.

[0056] The planting area was covered with Northwest desert sand, farmyard manure and rice husks in a mass ratio of 5:2:1, with a thickness of 12 cm; the planting area was spread with trace element chelated fertilizer, medium and trace element fertilizer, organic fertilizer, compound fertilizer potassium sulfate and biological bacterial fertilizer in a mass ratio of 1:4:6:4:4, with a fertilizer application rate of 1000g / m 2 / year, spread mineral potassium humate, high-efficiency water-soluble humic acid, and Junliqing powder in a mass ratio of 10:1:3 in the planting area, and the application rate of soil conditioner is 450g / m 2 .

[0057] After covering the soil, applying fertilizer and amendment, water the soil once. After 1 day, till the soil to a depth of 13 cm, water the soil once. After 1 day, mix oats, Elytium wilfordii, Puccinellia tenuifolia, Limonium twigensis, Artemisia camel, Buffalo bluegrass, salt-tolerant moonlit night bluegrass and Speidel alfalfa in equal weight ratio. The sowing rate of the plants is 30g / m 2 The sowing depth is 2cm, there is no spacing between rows and plants, and the seeds are sown evenly.

[0058] Water thoroughly after sowing; water once every 3 days to promote germination and root growth; water once every 7 days to help the seedlings grow slowly, water 5 times for a 24-day period, and water every 28 days after the seedlings grow slowly; when the seedlings are 12cm to 15cm tall, water once for tillering and branching, then irrigate and water 1 to 2 times depending on the soil moisture conditions, and in early November, water for wintering depending on weather conditions; at the end of February of the second year, water for greening up depending on weather conditions, water every 6 days, for a total of 4 times, and then apply fertilizer and water in time according to the seedling condition and soil moisture conditions.

[0059] When pests and diseases occur during the growth of seedlings, use Junliqing 900 times diluted solution to control gray mold, sooty mold, rust, and seedling blight, spray once a week for two consecutive weeks; use 2.5% highly effective chlorfenapyr 500 times diluted solution to control locusts, aphids, armyworms, loopers, middle flower beetles, and flower fly, spray once a week for two consecutive weeks. The nymph population density is high, greater than 10 heads / m 2 If the lesions are visible to the naked eye, use 400 times diluted 2.5% highly effective chlorfenapyr solution for prevention and control, spray once a week for three weeks; if the lesions are visible to the naked eye, use 400 times diluted Junliqing solution for prevention and control, spray once a week for three weeks.

[0060] From mid-August to mid-October, seeds are harvested manually when the pods turn light yellow-brown. The harvested seeds are tested for pests and kept as seeds. In the greening season of the second year, the soil is fertilized and the scattered bald spots that have not turned green are improved and replanted. Maintenance continues for 5 years.

[0061] Example 3

[0062] A planting site under the photovoltaic panels with gentle terrain, flat ground, good ventilation and sunshine was selected, and the planting area was demarcated. The average pH value of 10 soil samples tested was 8.59, and the average contents of hydrolyzable nitrogen, available phosphorus and fast-acting potassium were 7.39 mg / Kg, 8.45 mg / Kg and 63.44 mg / Kg respectively.

[0063] The planting area was covered with Northwest desert sand, farmyard manure and rice husks in a mass ratio of 5:2:1, with a covering thickness of 11cm; the planting area was spread with trace element chelated fertilizer, medium and trace element fertilizer, organic fertilizer, compound fertilizer potassium sulfate and biological bacterial fertilizer in a mass ratio of 1:4:6:4:4, with a fertilizer application rate of 940g / m 2 / year, spread mineral potassium humate, high-efficiency water-soluble humic acid, and Junliqing powder in a mass ratio of 10:1:3 in the planting area, and the application rate of soil conditioner is 400g / m 2 .

[0064] After covering the soil, applying fertilizer and amendment, water the soil once. After 1 day, till the soil to a depth of 13 cm, water the soil once. After 1 day, mix oats, Elytium wilfordii, Puccinellia tenuifolia, Limonium twigensis, Artemisia camel, Buffalo bluegrass, Salt-tolerant moonlit night bluegrass and Speidel alfalfa in equal weight ratio. The sowing rate of the plants is 28g / m 2 The sowing depth is 1cm, there is no spacing between rows and plants, and the seeds are sown evenly.

[0065] Water thoroughly after sowing; water once every 3 days to promote germination and root growth; water once every 6 days to help the seedlings grow slowly, water 5 times for a period of 24 days, and water every 26 days after the seedlings grow slowly; when the seedlings are 12cm to 15cm tall, water once for tillering and branching, then irrigate and water 1 to 2 times depending on the soil moisture conditions, and in early November, water for wintering depending on weather conditions; at the end of February of the second year, water for greening up depending on weather conditions, water every 6 days, for a total of 4 times, and then apply fertilizer and water in time according to the seedling condition and soil moisture conditions.

[0066] When pests and diseases occur during the growth of seedlings, use 800 times diluted Junliqing to control gray mold, sooty mold, rust, and seedling blight, spray once a week for two consecutive weeks; use 600 times diluted 2.5% highly effective chlorfenapyr to control locusts, aphids, armyworms, loopers, middle flower beetles, and flower fly, spray once a week for two consecutive weeks. The nymph population density is high, greater than 10 heads / m 2 If the lesions are visible to the naked eye, use 450 times diluted 2.5% highly effective chlorfenapyr solution for prevention and control, spray once a week for three consecutive weeks; if the lesions are visible to the naked eye, use 500 times diluted Junliqing solution for prevention and control, spray once a week for three consecutive weeks.

[0067] From mid-August to mid-October, seeds are harvested manually when the pods turn light yellow-brown. The harvested seeds are tested for pests and kept as seeds. In the greening season of the second year, the soil is fertilized and the scattered bald spots that have not turned green are improved and replanted. Maintenance continues for 5 years.

[0068] Test Example 1

[0069] Five years after planting and harvesting, the soil pH value and the contents of hydrolyzable nitrogen, available phosphorus and available potassium were tested (10 samples were taken to calculate the average value). The test results are shown in Table 1 below.

[0070] Table 1:

[0071] Grouping pH Hydrolyzable nitrogen (mg / Kg) Available phosphorus (mg / Kg) Fast-acting potassium (mg / Kg) Example 1 7.46 156.42 22.47 310.88 Example 2 7.91 109.11 16.84 231.56 Example 3 7.79 141.33 18.14 263.71

[0072] According to Table 1, after 5 years of maintenance, the pH values ​​of the soils of Examples 1 to 3 have all decreased, and the contents of hydrolyzable nitrogen, available phosphorus, and available potassium have all increased compared to before, reaching a certain content suitable for the growth of vegetation. It can be seen that the method of the present invention has a good effect on improving the strongly alkaline red clay. Especially the effect of Example 1, the soil pH value was improved from strongly alkaline 8.65 to neutral 7.46, the hydrolyzable nitrogen content in the soil was improved from extremely low level 6 to high content level 1, the available phosphorus content was improved from extremely low level 6 to high content level 2, and the available potassium content was improved from low level 5 to extremely high content level 1. This technical method improves the strongly alkaline red clay under the photovoltaic panel to a soil condition suitable for the growth of most plants, and is also fully capable of agricultural and animal husbandry production.

[0073] Test Example 2

[0074] The perennial plants planted in Example 1 were observed for 5 consecutive years, and the greening rate, plant height at maturity, and root penetration depth at maturity were tested in each greening season. The test results are shown in Table 2 below. Among them, the greening rate, plant height at maturity, and root penetration depth at maturity are all average values ​​within a certain area.

[0075] Table 2:

[0076]

[0077] According to Table 2, after 5 years of maintenance, the greening rate, plant height, and root penetration depth of perennial plants have all increased significantly. After soil improvement, the soil is suitable for the growth of these vegetation. Through the development of the root system and the growth of the plants, a large and dense root network and biomass are formed, and a stable soil cortex and humus layer are formed between 0 and 24 cm on the soil surface, which effectively provides rich nutrition for plants, prevents soil erosion, and plays a role in preventing wind and sand. At the same time, the horizontal growth of the root system reaches a maximum depth of 164 cm, breaking the solid soil structure in the deep layer and achieving deep improvement of the strongly alkaline red clay.

[0078] Test Example 3

[0079] The plants planted in Example 1, Example 2, and Example 3 were observed for 5 consecutive years, and the number of column clusters of the vegetation was tested during the stable growth period. The test results are shown in Table 3 below.

[0080] Table 3:

[0081] Example 1 Example 2 Example 3 <![CDATA[Number of clusters per m in the first year 2 > 84 86 90 <![CDATA[Number of clusters per square meter in the second year 2 > 144 117 125 <![CDATA[Number of clumps per m in the third year 2 > 168 132 147 <![CDATA[Number of clumps per m in the fourth year 2 > 182 161 170 <![CDATA[Number of clumps per m in the fifth year 2 > 216 185 193

[0082] According to Table 3, the number of plants planted in Example 1, Example 2, and Example 3 gradually increased, and the strongly alkaline red clay was gradually suitable for the growth of vegetation after being improved. At the same time, it created a soil environment for the good growth of other plants, thereby improving the diversity of plants.

[0083] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms may be for different embodiments or examples. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, unless they are contradictory.

[0084] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0085] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A method for improving and restoring vegetation of strongly alkaline red clay under photovoltaic panels, characterized in that: The following steps are involved: (a) Select a suitable planting site; (b) first covering the planting site with soil and applying fertilizer, and then applying a soil conditioner to improve the soil; (c) Select plants that are drought-resistant, cold-resistant, salt-tolerant, shade-tolerant, and highly adaptable for mixed planting; (d) Field management and pest control.

2. The method according to claim 1, characterized in that In step (a), the suitable planting site is a strongly alkaline red clay soil under the photovoltaic panel with a gentle terrain, flat ground, ventilation and sunshine, drought and little rain, and a pH value of 8.5 to 8.

77.

3. The method according to claim 1, characterized in that In step (b), the soil components of the covering soil include northwest desert sandy soil, farmyard manure and rice husks in a mass ratio of 5:2:1, and the thickness of the covering soil is 10 to 12 cm.

4. The method according to claim 1, characterized in that In step (b), the fertilizers used for fertilization include trace element chelated fertilizers, medium trace element fertilizers, organic fertilizers, compound fertilizer potassium sulfate and biological bacterial fertilizers in a mass ratio of 1:4:6:4:4, and the fertilizer application rate is 900-1000 g / m 2 / Year.

5. The method according to claim 1, characterized in that In step (b), the soil conditioner includes mineral potassium humate, high-efficiency water-soluble humic acid, and Junliqing powder in a mass ratio of 10:1:3, and the application amount of the soil conditioner is 350-450 g / m 2 .

6. The method according to claim 1, characterized in that The plants include oats, thin wheat grass, alkali grass, fine limonium, camel wormwood, buffalo bluegrass, salt-tolerant moonlit night bluegrass and Speidel alfalfa in equal weight ratios, and the sowing amount is 26-30 g / m 2 The sowing depth is 1 to 2 cm.

7. The method according to claim 1, characterized in that The field management is as follows: covering the soil, applying fertilizers, and applying amendments, then watering with fertilizer. After 1 to 2 days, water the soil once after rotary tillage to a depth of 13 to 15 cm. After 1 to 2 days, sow the seeds, and water thoroughly after sowing. Water the seeds once every 3 to 5 days to promote germination and rooting. Water the seeds every 6 to 7 days to help the seeds grow slowly, and water the seeds 3 to 5 times. The seedling growth period is 22 to 26 days, and water the seeds every 26 to 30 days after the seeds grow slowly. When the seedlings are 12 to 15 cm tall, water the seeds for tillering and branching, and then irrigate and water the seeds 1 to 2 times according to the soil moisture conditions. In early November, water the seeds for wintering according to weather conditions. At the end of February of the second year, water the seeds for greening up according to weather conditions, and water the seeds every 6 to 8 days for a total of 3 to 4 times. Then, apply fertilizer and water the seeds in time according to the seedling conditions and soil moisture conditions. From mid-August to mid-October, the seeds are harvested manually when the panicles and pods are light yellow-brown.

8. The method according to claim 7, characterized in that The pest control is to use 800-900 times diluted Junliqing to control gray mold, sooty mold, rust, and seedling blight, spraying once a week for two consecutive weeks; use 500-600 times diluted 2.5% highly effective chlorfenapyr to control locusts, aphids, armyworms, loopers, middle flower beetles, and flower fly, spraying once a week for two consecutive weeks.

9. The method according to claim 8, characterized in that The nymph population density is greater than 10 / m 2 If the lesions are visible to the naked eye, use 400-500 times diluted 2.5% highly effective chlorfenapyr for prevention and control, spray once a week for three weeks; if the lesions are visible to the naked eye, use 400-700 times diluted Junliqing for prevention and control, spray once a week for three weeks.

10. Use of the method according to any one of claims 1 to 9 in the restoration of vegetation in strongly alkaline red clay under photovoltaic panels in the arid areas of northwest China.

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