Method for planting trees in arid region

Abstract

The invention discloses a method for planting trees in an arid region, calcium peroxide in a biochar composite material provided by the invention slowly reacts with water to release oxygen, and the respiration of the root system of a sapling is promoted in a manner of continuously releasing oxygen, so that the growth of the sapling is promoted; according to the method, calcium peroxide is coated with the biochar / ammonium phosphomolybdate compound and starch instead of being directly added, calcium peroxide slowly reacts with water to generate calcium hydroxide, the calcium hydroxide is alkaline, root systems of saplings like a slightly acidic environment, and the generated calcium hydroxide is not beneficial to growth of the saplings, so that the yield of the saplings is increased, and the yield of the saplings is increased. By adopting the charcoal coating treatment, the release of hydroxyl ions can be reduced; meanwhile, ammonium phosphomolybdate is loaded on the surface and in a pore structure of the charcoal, calcium hydroxide generated by slow reaction of calcium peroxide and water is beneficial for promoting dissolution of ammonium phosphomolybdate, and then the calcium hydroxide is absorbed by the saplings, phosphorus and molybdenum elements needed by the saplings are supplemented, and growth of the saplings is promoted.

Description

Technical Field

[0001] The invention relates to the technical field of tree planting, and in particular to a method for planting trees in arid areas. Background Art

[0002] Plant growth is inseparable from the three elements of sunlight, air and soil, which together form the basis of plant life activities. Under sufficient sunlight, plants absorb light energy through chlorophyll for photosynthesis, converting carbon dioxide and water into nutrients while releasing oxygen. During the growth process, the roots of plants take root in the soil and absorb water and nutrients from the soil through capillary action. These nutrients promote the growth and development of plants.

[0003] However, in arid areas and barren mountainous regions, plants face severe challenges to survival. Lack of sufficient water makes it difficult for plants to complete normal physiological processes, eventually leading to withering and death. The soil in such areas is often poor and lacks the necessary minerals and organic matter. Not only can it not provide the nutrients needed for plant growth, but it may also aggravate the drought of the soil due to rapid evaporation of water.

[0004] In order to solve the above problems, attempts are currently being made to plant trees in arid and barren areas. However, relying solely on manual digging, watering and planting methods is not enough to ensure the survival of plants. In barren areas such as deserts, the dry climate and lack of water, as well as the poor soil, make it difficult for these trees and plants to adapt to the new environment, grow slowly, and have a relatively low survival rate.

[0005] Chinese patent document CN104170698B discloses a method for planting trees in arid and semi-arid areas, which uses a sowing method to replace the common tree planting method, specifically including seed selection, sowing, planting and maintenance steps. This patented technology abandons the current common tree planting method, is more flexible, and the sprouted and grown seedlings have better adaptability. However, the seed germination rate directly restricts the final tree planting survival rate, and in arid areas, the seed germination environment is very harsh, and it is difficult to guarantee the final survival rate. Summary of the invention

[0006] In view of the deficiencies of the prior art, the object of the present invention is to provide a method for planting trees in arid areas.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] A method for planting trees in arid areas comprises the following steps:

[0009] S1. Dig a planting hole in the natural soil layer. After the planting hole is dug, cover the bottom of the planting hole with a 10-15 cm thick soil conditioner, wherein the soil conditioner includes the following raw materials: 40-60 parts of fermented cassava residue, 10-15 parts of vermiculite powder, 10-20 parts of sheep manure, and 15-25 parts of biochar composite material.

[0010] In this step, the diameter of the planting hole is 30-40 cm, and the depth of the planting hole is 25-30 cm.

[0011] The soil conditioner provided by the invention comprises a composite material of fermented cassava residue, vermiculite powder, sheep manure and biochar.

[0012] In some embodiments of the present invention, the fermented cassava residue can be selected from 40 parts, 42 parts, 45 parts, 48 ​​parts, 50 parts, 52 parts, 55 parts, 58 parts, and 60 parts, but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0013] The preparation method of fermented cassava residue adopts the existing technology as the preferred technical scheme of the present invention. The preparation method of fermented cassava residue is as follows: inoculating plant lactobacillus liquid into dry cassava residue, adjusting the water content to 60-65% with physiological saline, mixing evenly, putting into a polyethylene film bag, extracting the air in the bag to a vacuum state with a vacuum pump, sealing, placing at room temperature for solid-state fermentation for 7-10 days, then air-drying and sun-drying the fermented material to a water content of 24-28%, and then crushing to 1-2.5 mm to obtain fermented cassava residue.

[0014] Further preferably, based on the mass of the cassava residue dry matter, the inoculation amount of the Lactobacillus plantarum liquid is 3-5%, and the content of live bacteria in the Lactobacillus plantarum liquid is 3×10 5 -5×10 5 cfu / mL.

[0015] Fermented cassava residue is a byproduct of cassava processing, which is rich in organic matter. The present invention can convert cassava residue into nutrient-rich organic fertilizer through fermentation treatment, which can effectively increase the organic matter content in the soil, and at the same time can improve the soil aggregate structure, enhance the air permeability and water permeability of the soil, make the soil more loose, and promote the growth of the root system and the retention of water.

[0016] In some embodiments of the present invention, the vermiculite powder can be selected to be 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, or 15 parts, but is not limited to the listed values, and other values ​​not listed within the numerical range are also applicable.

[0017] Vermiculite powder has good air permeability, which can improve the aeration of the soil and prevent the soil from becoming compacted. At the same time, due to the layered structure of vermiculite, it can retain more water, reduce water evaporation and loss, and help plants use water.

[0018] In some embodiments of the present invention, the sheep manure can be selected as 10 parts, 11 parts, 12 parts, 13 parts, 14 parts, 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, and 20 parts, but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0019] Sheep manure is a high-quality organic fertilizer that contains a large amount of organic matter and humus. It can significantly increase the organic matter content of the soil and improve the soil structure. At the same time, the organic matter in sheep manure can enhance the soil's water retention capacity, help slow down water evaporation in the dry season, maintain soil moisture, and provide protection for plant growth.

[0020] In some embodiments of the present invention, the biochar composite material can be selected from 15 parts, 16 parts, 17 parts, 18 parts, 19 parts, 20 parts, 21 parts, 22 parts, 23 parts, 24 parts, and 25 parts, but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0021] Specifically, the preparation method of the biochar composite material is as follows:

[0022] (1) dispersing biochar in deionized water, then adding phosphate and ammonium molybdate thereto, mixing evenly, then adding an acid solution, stirring to react, and after the reaction is completed, filtering, washing, and drying to obtain a biochar / ammonium phosphomolybdate complex;

[0023] (2) Calcium peroxide and sodium carboxymethyl cellulose are mixed evenly, and then granulated by a granulator to obtain spherical calcium peroxide particles. The spherical calcium peroxide particles are used as the core, and the biochar / ammonium phosphomolybdate complex and starch are mixed evenly and coated on the surface of the spherical calcium peroxide particles by a granulator. After cooling and drying, a biochar composite material is obtained.

[0024] As a preferred technical solution of the present invention, in step (1), the usage ratio of biochar, phosphate, ammonium molybdate and acid solution is 8-12g:3-5g:6-8g:20-30mL.

[0025] Specifically, the phosphate is selected from sodium phosphate or potassium phosphate.

[0026] Specifically, the acid solution is preferably a nitric acid solution, and the concentration of the acid solution is 4-8 mol / L.

[0027] Specifically, in step (1), stirring is carried out at room temperature, and the stirring reaction time is 6-12 hours, for example, 6 hours, 7 hours, 8 hours, 9 hours, 10 hours, 11 hours, 12 hours can be selected, but it is not limited to the listed values, and other values ​​not listed within the numerical range are also applicable.

[0028] As a preferred technical solution of the present invention, in step (2), the mass ratio of calcium peroxide to sodium carboxymethyl cellulose is 5-10:1-2, for example, 5:1, 5:2, 6:1, 8:2, 10:1, 10:2 can be selected, but it is not limited to the listed values, and other values ​​not listed within the numerical range are also applicable.

[0029] In step (2), the mass ratio of the biochar / ammonium phosphomolybdate complex, starch and calcium peroxide spherical particles is 40-60:3-5:10-20.

[0030] Specifically, the starch is selected from tapioca starch, potato starch or corn starch.

[0031] S2, planting the sapling with mud into the planting hole, and backfilling and covering the planting hole with filler, followed by conventional maintenance, wherein the filler includes raw materials of the following components: 50-60 parts of clay and 30-40 parts of straw powder.

[0032] In some embodiments of the present invention, the clay can be selected to be 50 parts, 51 parts, 52 parts, 53 parts, 54 parts, 55 parts, 56 parts, 57 parts, 58 parts, 59 parts, and 60 parts; but it is not limited to the listed values, and other values ​​not listed within the numerical range are also applicable.

[0033] In some embodiments of the present invention, the straw powder can be selected from 30 parts, 31 parts, 32 parts, 33 parts, 34 parts, 35 parts, 36 parts, 37 parts, 38 parts, 39 parts, and 40 parts, but is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0034] Specifically, the straw powder is selected from corn straw powder, wheat straw powder or rice straw powder.

[0035] Compared with the prior art, the present invention has the following beneficial effects:

[0036] (1) The cassava residue, vermiculite powder and sheep manure utilized in the present invention are common raw materials, but their utilization rate is not high at present, and they are often piled up or discarded in large quantities. By making them into soil conditioners, the resource utilization of wastes is realized, the natural environment is effectively protected, good economic benefits, social benefits and ecological benefits are created, and the market prospect is very broad.

[0037] (2) The biochar composite material provided by the present invention first generates ammonium phosphomolybdate precipitate under acidic conditions by using phosphate and ammonium molybdate, and attaches the precipitate to the surface and pore structure of the biochar to obtain a biochar / ammonium phosphomolybdate composite. Subsequently, calcium peroxide spherical particles are used as the core, and the biochar / ammonium phosphomolybdate composite and starch are coated on the surface of the calcium peroxide spherical particles to obtain a biochar composite material. The calcium peroxide in the biochar composite material provided by the present invention can slowly react with water to release oxygen, and promote the respiration of the seedling root system by continuously releasing oxygen, thereby promoting the growth of the seedling. The present invention adopts the method of coating calcium peroxide with biochar / ammonium phosphomolybdate composite and starch instead of directly adding calcium peroxide, because calcium peroxide slowly reacts with water to generate calcium hydroxide, which is alkaline, and the root system of the seedling prefers a slightly acidic environment. The generated calcium hydroxide is not conducive to the growth of the seedling. By adopting biochar coating treatment, the release of hydroxide ions can be reduced.

[0038] (3) The present invention loads ammonium phosphomolybdate on the surface and pore structure of biochar. Ammonium phosphomolybdate is almost insoluble in water and acid, but soluble in alkaline solution. The calcium hydroxide generated by the slow reaction of calcium peroxide and water in the present invention is conducive to promoting the dissolution of ammonium phosphomolybdate, which is then absorbed and utilized by the seedlings, supplementing the phosphorus and molybdenum elements required by the seedlings, and promoting the growth of the seedlings. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 This is a comparison diagram of the heights of saplings according to the planting methods adopted in different embodiments and comparative examples of the present invention. DETAILED DESCRIPTION

[0040] The present invention is further described in detail below through specific preferred embodiments, but the present invention is not limited to the following embodiments.

[0041] It should be noted that, unless otherwise specified, the chemical reagents involved in the present invention were purchased through commercial channels.

[0042] The biochar used in the present invention is rice husk biochar with a mesh size of 200 meshes, purchased from Henan Jiahe Water Purification Materials Co., Ltd.; the mesh size of vermiculite powder is 400 meshes; and the model of Lactobacillus plantarum is Lactobacillus plantarum Lp90.

[0043] Example 1

[0044] A method for planting trees in arid areas comprises the following steps:

[0045] S1. Dig a planting hole in the natural soil layer. The diameter of the planting hole is 40 cm and the depth of the planting hole is 30 cm. After the planting hole is dug, cover the bottom of the planting hole with a 10 cm thick soil conditioner, wherein the soil conditioner includes the following raw materials: 40 parts of fermented cassava residue, 15 parts of vermiculite powder, 20 parts of sheep manure, and 20 parts of biochar composite material.

[0046] The preparation method of fermented cassava residue is as follows: inoculate Lactobacillus plantarum liquid into dry cassava residue, the inoculation amount of Lactobacillus plantarum liquid is 5% based on the mass of dry matter of cassava residue, and the content of live bacteria in the Lactobacillus plantarum liquid is 3×10 5 cfu / mL, adjust the water content to 60% with physiological saline, mix well, put into a polyethylene film bag, use a vacuum pump to evacuate the air in the bag to a vacuum state, seal it, and place it for solid-state fermentation at room temperature for 7 days. Then, the fermented material is air-dried and air-dried to a moisture content of 25%, and then crushed to 2 mm to obtain fermented cassava residue.

[0047] The preparation method of biochar composite material is as follows:

[0048] (1) 8 g of biochar was dispersed in 100 mL of deionized water, and then 3 g of potassium phosphate and 6 g of ammonium molybdate were added thereto and mixed evenly, followed by adding 20 mL of 6 mol / L nitric acid solution, stirring and reacting at room temperature for 6 h. After the reaction was completed, the biochar / ammonium phosphomolybdate complex was obtained by filtering, washing and drying;

[0049] (2) 500 g of calcium peroxide and 100 g of sodium carboxymethyl cellulose were mixed evenly, and then granulated by a granulator to obtain spherical calcium peroxide particles with a particle size of 1 mm. Then, with the spherical calcium peroxide particles as the core, 4 kg of biochar / ammonium phosphomolybdate composite and 0.3 kg of cassava starch were mixed evenly and coated on the surface of 1 kg of calcium peroxide spherical particles by a granulator. After cooling and drying, a biochar composite material was obtained.

[0050] S2, planting the saplings with mud into the planting holes, and backfilling and covering the planting holes with fillers, followed by conventional maintenance, wherein the fillers include raw materials of the following components: 50 parts of clay and 30 parts of wheat straw powder.

[0051] Example 2

[0052] A method for planting trees in arid areas comprises the following steps:

[0053] S1. Dig a planting hole in the natural soil layer. The diameter of the planting hole is 40 cm and the depth of the planting hole is 30 cm. After the planting hole is dug, cover the bottom of the planting hole with a 15 cm thick soil conditioner, wherein the soil conditioner includes the following raw materials: 60 parts of fermented cassava residue, 10 parts of vermiculite powder, 10 parts of sheep manure, and 25 parts of biochar composite material.

[0054] The preparation method of fermented cassava residue is as follows: inoculate Lactobacillus plantarum liquid into dry cassava residue, the inoculation amount of Lactobacillus plantarum liquid is 5% based on the mass of dry matter of cassava residue, and the content of live bacteria in the Lactobacillus plantarum liquid is 3×10 5 cfu / mL, adjust the water content to 60% with physiological saline, mix well, put into a polyethylene film bag, use a vacuum pump to evacuate the air in the bag to a vacuum state, seal it, and place it for solid-state fermentation at room temperature for 7 days. Then, the fermented material is air-dried and air-dried to a moisture content of 25%, and then crushed to 2 mm to obtain fermented cassava residue.

[0055] The preparation method of biochar composite material is as follows:

[0056] (1) 12 g of biochar was dispersed in 100 mL of deionized water, and then 5 g of potassium phosphate and 8 g of ammonium molybdate were added thereto and mixed evenly, followed by adding 30 mL of 4 mol / L nitric acid solution, stirring and reacting at room temperature for 12 h. After the reaction was completed, the biochar / ammonium phosphomolybdate complex was obtained by filtering, washing and drying;

[0057] (2) 1 kg of calcium peroxide and 0.2 kg of sodium carboxymethyl cellulose were mixed evenly, and then granulated by a granulator to obtain spherical calcium peroxide particles with a particle size of 1 mm. Then, with the spherical calcium peroxide particles as the core, 6 kg of biochar / ammonium phosphomolybdate composite and 0.5 kg of cassava starch were mixed evenly and coated on the surface of 2 kg of calcium peroxide spherical particles by a granulator. After cooling and drying, a biochar composite material was obtained.

[0058] S2, planting the saplings with mud into the planting holes, and backfilling and covering the planting holes with fillers, followed by conventional maintenance, wherein the fillers include raw materials of the following components: 60 parts of clay and 40 parts of wheat straw powder.

[0059] Example 3

[0060] A method for planting trees in arid areas comprises the following steps:

[0061] S1. Dig a planting hole in the natural soil layer. The diameter of the planting hole is 40 cm and the depth of the planting hole is 30 cm. After the planting hole is dug, cover the bottom of the planting hole with a 12 cm thick soil conditioner, wherein the soil conditioner includes the following raw materials: 50 parts of fermented cassava residue, 12 parts of vermiculite powder, 15 parts of sheep manure, and 15 parts of biochar composite material.

[0062] The preparation method of fermented cassava residue is as follows: inoculate Lactobacillus plantarum liquid into dry cassava residue, the inoculation amount of Lactobacillus plantarum liquid is 5% based on the mass of dry matter of cassava residue, and the content of live bacteria in the Lactobacillus plantarum liquid is 3×10 5 cfu / mL, adjust the water content to 60% with physiological saline, mix well, put into a polyethylene film bag, use a vacuum pump to evacuate the air in the bag to a vacuum state, seal it, and place it for solid-state fermentation at room temperature for 7 days. Then, the fermented material is air-dried and air-dried to a moisture content of 25%, and then crushed to 2 mm to obtain fermented cassava residue.

[0063] The preparation method of biochar composite material is as follows:

[0064] (1) 10 g of biochar was dispersed in 100 mL of deionized water, and then 4 g of potassium phosphate and 8 g of ammonium molybdate were added thereto and mixed evenly, followed by adding 30 mL of 5 mol / L nitric acid solution, stirring and reacting at room temperature for 8 h. After the reaction was completed, the biochar / ammonium phosphomolybdate complex was obtained by filtering, washing and drying;

[0065] (2) 800 g of calcium peroxide and 150 g of sodium carboxymethyl cellulose were mixed evenly, and then granulated by a granulator to obtain spherical calcium peroxide particles with a particle size of 1 mm. Then, with the spherical calcium peroxide particles as the core, 5 kg of biochar / ammonium phosphomolybdate composite and 0.4 kg of cassava starch were mixed evenly and coated on the surface of 1.5 kg of calcium peroxide spherical particles by a granulator. After cooling and drying, a biochar composite material was obtained.

[0066] S2, planting the saplings with mud into the planting holes, and backfilling and covering the planting holes with fillers, followed by conventional maintenance, wherein the fillers include raw materials of the following components: 55 parts of clay and 35 parts of wheat straw powder.

[0067] Comparative Example 1

[0068] A method for planting trees in arid areas comprises the following steps:

[0069] S1. Dig a planting hole in the natural soil layer. The diameter of the planting hole is 40 cm and the depth of the planting hole is 30 cm. After the planting hole is dug, cover the bottom of the planting hole with a 10 cm thick soil conditioner, wherein the soil conditioner includes the following raw materials: 40 parts of fermented cassava residue, 15 parts of vermiculite powder, 20 parts of sheep manure, and 20 parts of biochar.

[0070] The preparation method of fermented cassava residue is as follows: inoculate Lactobacillus plantarum liquid into dry cassava residue, the inoculation amount of Lactobacillus plantarum liquid is 5% based on the mass of dry matter of cassava residue, and the content of live bacteria in the Lactobacillus plantarum liquid is 3×10 5 cfu / mL, adjust the water content to 60% with physiological saline, mix well, put into a polyethylene film bag, use a vacuum pump to evacuate the air in the bag to a vacuum state, seal it, and place it for solid-state fermentation at room temperature for 7 days. Then, the fermented material is air-dried and air-dried to a moisture content of 25%, and then crushed to 2 mm to obtain fermented cassava residue.

[0071] S2, planting the saplings with mud into the planting holes, and backfilling and covering the planting holes with fillers, followed by conventional maintenance, wherein the fillers include raw materials of the following components: 50 parts of clay and 30 parts of wheat straw powder.

[0072] Compared with Example 1, Comparative Example 1 did not perform modification treatment on the biochar.

[0073] Comparative Example 2

[0074] A method for planting trees in arid areas comprises the following steps:

[0075] S1. Dig a planting hole in the natural soil layer. The diameter of the planting hole is 40 cm and the depth of the planting hole is 30 cm. After the planting hole is dug, cover the bottom of the planting hole with a 10 cm thick soil conditioner, wherein the soil conditioner includes the following raw materials: 40 parts of fermented cassava residue, 15 parts of vermiculite powder, 20 parts of sheep manure, and 20 parts of biochar composite material.

[0076] The preparation method of fermented cassava residue is as follows: inoculate Lactobacillus plantarum liquid into dry cassava residue, the inoculation amount of Lactobacillus plantarum liquid is 5% based on the mass of dry matter of cassava residue, and the content of live bacteria in the Lactobacillus plantarum liquid is 3×10 5 cfu / mL, adjust the water content to 60% with physiological saline, mix well, put into a polyethylene film bag, use a vacuum pump to evacuate the air in the bag to a vacuum state, seal it, and place it for solid-state fermentation at room temperature for 7 days. Then, the fermented material is air-dried and air-dried to a moisture content of 25%, and then crushed to 2 mm to obtain fermented cassava residue.

[0077] The preparation method of biochar composite material is as follows:

[0078] 8 g of biochar was dispersed in 100 mL of deionized water, and then 3 g of potassium phosphate and 6 g of ammonium molybdate were added thereto and mixed evenly. Subsequently, 20 mL of 6 mol / L nitric acid solution was added and stirred at room temperature for 6 h. After the reaction was completed, the biochar composite material was obtained by filtering, washing and drying.

[0079] S2, planting the saplings with mud into the planting holes, and backfilling and covering the planting holes with fillers, followed by conventional maintenance, wherein the fillers include raw materials of the following components: 50 parts of clay and 30 parts of wheat straw powder.

[0080] Compared with Example 1, in Comparative Example 2, only the biochar was loaded with ammonium phosphomolybdate.

[0081] Comparative Example 3

[0082] A method for planting trees in arid areas comprises the following steps:

[0083] S1. Dig a planting hole in the natural soil layer. The diameter of the planting hole is 40 cm and the depth of the planting hole is 30 cm. After the planting hole is dug, cover the bottom of the planting hole with a 10 cm thick soil conditioner, wherein the soil conditioner includes the following raw materials: 40 parts of fermented cassava residue, 15 parts of vermiculite powder, 20 parts of sheep manure, and 20 parts of biochar composite material.

[0084] The preparation method of fermented cassava residue is as follows: inoculate Lactobacillus plantarum liquid into dry cassava residue, the inoculation amount of Lactobacillus plantarum liquid is 5% based on the mass of dry matter of cassava residue, and the content of live bacteria in the Lactobacillus plantarum liquid is 3×10 5 cfu / mL, adjust the water content to 60% with physiological saline, mix well, put into a polyethylene film bag, use a vacuum pump to evacuate the air in the bag to a vacuum state, seal it, and place it for solid-state fermentation at room temperature for 7 days. Then, the fermented material is air-dried and air-dried to a moisture content of 25%, and then crushed to 2 mm to obtain fermented cassava residue.

[0085] The preparation method of biochar composite material is as follows:

[0086] 500g of calcium peroxide and 100g of sodium carboxymethyl cellulose are mixed evenly, and then granulated by a granulator to obtain spherical calcium peroxide particles with a particle size of 1mm. Then, with the spherical calcium peroxide particles as the core, 4kg of biochar and 0.3kg of cassava starch are mixed evenly and coated on the surface of 1kg of the spherical calcium peroxide particles by a granulator. After cooling and drying, a biochar composite material is obtained.

[0087] S2, planting the saplings with mud into the planting holes, and backfilling and covering the planting holes with fillers, followed by conventional maintenance, wherein the fillers include raw materials of the following components: 50 parts of clay and 30 parts of wheat straw powder.

[0088] Compared with Example 1, in Comparative Example 3, the biochar was not treated with ammonium phosphomolybdate loading.

[0089] In an arid area of ​​Dingxi City, Gansu Province, in early April 2023, larch pine seedlings were planted according to the methods of Examples 1-3 and Comparative Examples 1-3, 100 seedlings were planted in each group, and no additional fertilizer was applied after planting. Watering was performed once in early May and early June, with a watering amount of 50 mL each time. Watering was performed once every half month in July, August, and September, with a watering amount of 50 mL each time. After watering once in early October, no watering was performed again, with a watering amount of 50 mL. The tree height (height from the ground) of larch pine was measured in early May 2024, and the average value was calculated. The results are as follows: Figure 1 As shown, from Figure 1 It can be seen that by adopting the planting method in the embodiment of the present invention, the average tree height of Pinus sylvestris var. mongolica is higher.

[0090] Finally, it should be noted that the above embodiments do not limit the present invention in any form. For those skilled in the art, some modifications and improvements can be made to the present invention. Therefore, any modification or improvement made without departing from the spirit of the present invention belongs to the scope of protection claimed in the present invention.

Claims

1. A method for planting trees in arid areas, characterized in that: The steps include: S1. Digging a planting hole in the natural soil layer. After the planting hole is dug, covering the bottom of the planting hole with a thickness of 10-15 cm of soil conditioner, wherein the soil conditioner comprises the following raw materials: 40-60 parts of fermented cassava residue, 10-15 parts of vermiculite powder, 10-20 parts of sheep manure, and 15-25 parts of biochar composite material; S2, planting the sapling with mud into the planting hole, and backfilling and covering the planting hole with filler, followed by conventional maintenance, wherein the filler includes raw materials of the following components: 50-60 parts of clay and 30-40 parts of straw powder.

2. The planting method according to claim 1, characterized in that: In step S1, the preparation method of the biochar composite material is as follows: (1) dispersing biochar in deionized water, then adding phosphate and ammonium molybdate thereto, mixing evenly, then adding an acid solution, stirring to react, and after the reaction is completed, filtering, washing, and drying to obtain a biochar / ammonium phosphomolybdate complex; (2) Calcium peroxide and sodium carboxymethyl cellulose are mixed evenly, and then granulated by a granulator to obtain spherical calcium peroxide particles. The spherical calcium peroxide particles are used as the core, and the biochar / ammonium phosphomolybdate complex and starch are mixed evenly and coated on the surface of the spherical calcium peroxide particles by a granulator. After cooling and drying, a biochar composite material is obtained.

3. The planting method according to claim 2, characterized in that: In step (1), the usage ratio of biochar, phosphate, ammonium molybdate and acid solution is 8-12g:3-5g:6-8g:20-30mL, wherein the concentration of the acid solution is 4-8mol / L.

4. The planting method according to claim 2, characterized in that: In step (1), the stirring reaction time is 6-12 hours.

5. The planting method according to claim 2, characterized in that: In step (2), the mass ratio of calcium peroxide to sodium carboxymethyl cellulose is 5-10:1-2.

6. The planting method according to claim 2, characterized in that: In step (2), the mass ratio of the biochar / ammonium phosphomolybdate complex, starch and calcium peroxide spherical particles is 40-60:3-5:10-20.

7. The planting method according to claim 1, characterized in that: In step S1, the diameter of the planting hole is 30-40 cm, and the depth of the planting hole is 25-30 cm.

8. The planting method according to claim 1, characterized in that: In step S1, the preparation method of the fermented cassava residue is as follows: inoculating plant lactobacillus liquid into dry cassava residue, adjusting the water content to 60-65% with physiological saline, mixing evenly, putting into a polyethylene film bag, extracting the air in the bag to a vacuum state with a vacuum pump, sealing, placing the bag under room temperature for solid-state fermentation for 7-10 days, air-drying the fermented material to a water content of 24-28%, and then crushing to 1-2.5 mm to obtain the fermented cassava residue.

9. The planting method according to claim 8, characterized in that: Based on the mass of cassava residue dry matter, the inoculation amount of Lactobacillus plantarum liquid is 3-5%, and the content of live bacteria in the Lactobacillus plantarum liquid is 3×10 5 -5×10 5 cfu / mL.

10. The planting method according to claim 1, characterized in that: In step S2, the straw powder is selected from corn straw powder, wheat straw powder or rice straw powder.

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