Organic fertilizer for improving fruit tree planting soil and preparation method

Abstract

The invention discloses an organic fertilizer for improving fruit tree planting soil and a preparation method thereof. The organic fertilizer is mainly prepared from the following raw materials in percentage by mass: 40-50% of decomposed plant residues, 5-10% of crushed straws, 5-10% of a microbial agent, 20-30% of mineral powder, 5-10% of a plant extract and 1-5% of a binder, the decomposed plant residues comprise a mixture of plants such as fallen leaves and pomace, the decomposed plant residues reach the decomposition standard after 6-month composting treatment, and the crushed particle size of the decomposed plant residues is smaller than 5mm. According to the organic fertilizer for improving the fruit tree planting soil and the preparation method, the dissolution rate of organic matter in the soil can be effectively regulated and controlled, and the yield of the fruit tree planting soil is improved. The soil matrix is prevented from being dissolved too fast, and the risk of organic matter loss caused by natural factors such as rain wash is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of agriculture, and in particular to an organic fertilizer for improving fruit tree planting soil and a preparation method thereof. Background Art

[0002] Organic fertilizers are mainly derived from plants or animals and are made through composting, fermentation, etc. These processes help decompose organic matter, kill pathogens, reduce the content of harmful substances, and retain nutrients and microorganisms that are beneficial to plant growth. The advantage of organic fertilizers is that they have comprehensive nutrients, containing macroelements and trace elements required for plant growth, as well as rich organic matter. The microorganisms in organic fertilizers can also promote biological reactions in the soil, further improving soil fertility.

[0003] Patent Publication No. CN106146203A discloses an organic fertilizer. The organic fertilizer includes: 12-17 parts of animal bone meal; 17-20 parts of pig manure; 15-20 parts of cow manure; 12-17 parts of furfural residue; 10-18 parts of soybean meal; 10-15 parts of broiler manure; 2-7 parts of gypsum powder; 2-7 parts of sugars; 2-7 parts of waste fungus spores. It can be seen from the above scheme that the organic fertilizer can improve the soil, improve the quality of crops, has no chemical additives, is safe for humans, animals and the environment, is non-toxic, reduces environmental pollution, and is an environmentally friendly fertilizer.

[0004] Patent publication number CN106146202A discloses a selenium-rich biological organic fertilizer. The selenium-rich biological organic fertilizer includes: 400-500 parts of pig manure; 70-110 parts of sweet potato vines; 60-100 parts of nitrogen, phosphorus and potassium fertilizers; 70-100 parts of soybean meal; 20-40 parts of diatomaceous earth; 80-120 parts of stone straw; 10-30 parts of sugars; 10-20 parts of waste fungus spores. It can be seen from the above scheme that the selenium-rich biological organic fertilizer has a simple ratio and a high selenium content in the organic fertilizer. It can significantly increase the selenium content in the soil, improve the soil, and improve the quality of crops. It is safe for humans, animals, and the environment, non-toxic, and reduces environmental pollution. It is an environmentally friendly fertilizer.

[0005] Patent publication number CN103044168A discloses a pure manure organic fertilizer, the raw material composition and weight percentage range of which are: chicken manure 75-80%; sheep manure 10-15%; cow manure 1-5%; additives 1-5%. In the above scheme, it can be seen that the organic fertilizer is made by scientifically matching pure manure such as chicken manure, sheep manure and cow manure, which has strong fertility and can effectively improve the natural growth ability of crops. The crops grow very healthily, and can also effectively improve the soil and improve the nutritional capacity of the soil; the organic fertilizer is added with humic acid and biological bacteria, which can effectively and gradually degrade the compaction and degradation problems of the soil, gradually restore the natural nutrition of the soil, and lay the foundation for the sustainable development of the soil; the organic fertilizer can effectively improve the quality of crops, improve the nutritional capacity of crops, and the crops have a good taste and are healthy and green.

[0006] However, there are still some problems in the specific use of existing organic fertilizers:

[0007] After the application of traditional organic fertilizers in fruit tree planting, the nutrients in the organic fertilizers are often quickly dissolved and dispersed to areas other than the roots of the fruit trees due to rain erosion, making it difficult to accurately concentrate them near the roots of the fruit trees, resulting in low fertilizer utilization efficiency and waste of resources. Fruit trees have a long growth cycle and a continuous high demand for soil fertility. In order to ensure that soil fertility remains stable, frequent fertilization is required, which not only increases the cost of fruit tree planting, but also increases the input of agricultural labor and the complexity of management. Summary of the invention

[0008] The object of the present invention is to provide an organic fertilizer for improving fruit tree planting soil and a preparation method thereof, so as to solve the problems raised in the above-mentioned background technology.

[0009] To achieve the above-mentioned purpose, the present invention provides the following technical scheme: an organic fertilizer for improving fruit tree planting soil, the organic fertilizer mainly consists of the following raw materials: decomposed plant residues accounting for 40-50% of the total mass, straw fragments accounting for 5-10% of the total mass, microbial agents accounting for 5-10% of the total mass, mineral powder accounting for 20-30% of the total mass, plant extracts accounting for 5-10% of the total mass and a binder accounting for 1-5% of the total mass.

[0010] A method for preparing organic fertilizer for improving fruit tree planting soil comprises the following steps:

[0011] (1) crushing the decomposed plant residues into a suitable particle size, and placing the prepared decomposed plant residues in a mixer;

[0012] (2) mixing the microbial agent and a portion (70%) of the mineral powder evenly to form a microbial agent mixture;

[0013] (3) spraying the plant extract in liquid form evenly on the decomposed plant residues of step (1), stirring at a speed of 500 rpm for 5 minutes to ensure sufficient mixing;

[0014] (4) adding the inoculum mixture obtained in step (2), chopped straw, the remaining (30%) mineral powder and the binder to the mixture in step (3), stirring the mixture in a stirrer at a speed of 500 rpm for 10 minutes to form a wet and sticky material;

[0015] (5) feeding the uniformly mixed material in step (4) into a granulator for granulation, wherein the particle size is between 5 and 10 mm;

[0016] (6) The prepared granules are sent to a dryer and dried at 50-60° C. until the moisture content is less than 15%, thereby obtaining a finished organic fertilizer.

[0017] As a preferred technical solution of the present invention, the decomposed plant residues include a mixture of fallen leaves, fruit residues and other plants, and reach the decomposition standard after 6 months of composting treatment.

[0018] As a preferred technical solution of the present invention, the crushed particle size of the decomposed plant residues is less than 5 mm, and the length of the straw crushed is 1-3 mm.

[0019] As a preferred technical solution of the present invention, the microbial agent comprises nitrogen-fixing bacteria, phosphate-solubilizing bacteria, potassium-solubilizing bacteria and lactic acid bacteria, and the number of viable bacteria of each species in the agent is not less than 100 million CFU / g.

[0020] As a preferred technical solution of the present invention, the nitrogen-fixing bacteria, phosphate-solubilizing bacteria, potassium-solubilizing bacteria and lactic acid bacteria are mixed in a ratio of 1:1:1:1.

[0021] As a preferred technical solution of the present invention, the mineral powder is bentonite.

[0022] As a preferred technical solution of the present invention, the bentonite is in fine powder form with a particle size less than 0.5 mm.

[0023] As a preferred technical solution of the present invention, the plant extract is derived from seaweed, obtained by a water extraction process, and has a concentration of 10% (w / v).

[0024] As a preferred technical solution of the present invention, the binder is xanthan gum, which serves as an auxiliary material for particle molding.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. The present invention can effectively regulate the dissolution rate of organic matter into the soil by adding shredded straw, and prevent it from being integrated into the soil matrix too quickly, thereby reducing the risk of organic matter loss caused by natural factors such as rain erosion. It ensures that the plant can continuously obtain a stable supply of organic matter throughout the growth cycle, especially in the late growth period, effectively preventing the growth restriction problem caused by lack of organic matter, and has a significant promoting effect on the healthy growth and development of the plant. After the organic fertilizer is completely dissolved in the soil, the shredded straw can also be dissolved in the soil as an organic fertilizer, and the shredded straw can prevent soil erosion after being dissolved in the soil, effectively improving the soil structure.

[0027] 2. The present invention can improve the cohesiveness and permeability of the soil by adding bentonite, making the soil loose and porous, which is beneficial to the respiration and growth of plant roots and improves the water and fertilizer retention capacity of the soil. The porous structure of bentonite is beneficial to the reproduction and activity of microorganisms, promotes a significant increase in the number of microbial populations in organic fertilizers, not only enhances the biological activity of the soil, but also promotes the metabolic activity of microorganisms, providing a more fertile soil environment for the healthy growth of fruit trees. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 A flow chart of a method for preparing organic fertilizer for improving soil for fruit tree cultivation;

[0029] Figure 2 This is a comparison diagram of the soil improvement cycle effect of organic fertilizer in the technical solution of the present invention;

[0030] Figure 3 This is a comparison chart of the soil improvement cycle effects of traditional organic fertilizers. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0032] See also Figure 1-3 The present invention provides a technical solution of an organic fertilizer for improving fruit tree planting soil and a preparation method thereof:

[0033] The organic fertilizer is mainly composed of the following raw materials in percentage by weight: decomposed plant residues, straw, microbial agent, mineral powder, plant extract and binder, wherein the microbial agent contains two beneficial bacteria species that promote soil microbial diversity.

[0034] The decomposed plant residues of the present invention include a mixture of fallen leaves, fruit residues and other plants, which reach the decomposition standard after 6 months of composting treatment and serve as the main material source of organic fertilizer.

[0035] The crushed particle size of the decomposed plant residues of the present invention is less than 5 mm, and the length of the straw crushed is 1-3 mm. The straw crushed can prolong the time for the fertilizer to dissolve in the soil and reduce the number of times the fertilizer is applied.

[0036] The microbial agent of the present invention comprises nitrogen-fixing bacteria, phosphate-solubilizing bacteria, potassium-solubilizing bacteria and lactic acid bacteria, the number of live bacteria of each species in the agent is not less than 100 million CFU / g, and there is a synergistic effect between the species, which can enhance soil fertility and inhibit the growth of harmful microorganisms.

[0037] The nitrogen-fixing bacteria, phosphate-solubilizing bacteria, potassium-solubilizing bacteria and lactic acid bacteria of the present invention are mixed in a ratio of 1:1:1:1, and the decomposed plant residues and the microbial agent work together to increase the organic matter content in the soil, improve the soil's water and fertilizer retention capacity, and provide sufficient nutrients for the growth of fruit trees.

[0038] The mineral powder described in the present invention is bentonite, which has strong adsorption and expansion properties, can improve the adhesion and permeability of the soil, make the soil loose and porous, which is beneficial to the respiration and growth of plant roots and improves the water and fertilizer retention capacity of the soil. The porous structure of bentonite is beneficial to the reproduction and activity of microorganisms, thereby enhancing the fertility of the soil.

[0039] In the present invention, bentonite is added twice to prevent the water absorption and physical friction of the powder from adversely affecting the activity of the microorganisms.

[0040] The bentonite described in the present invention is in fine powder form, with a particle size of less than 0.5 mm.

[0041] The plant extract of the present invention is derived from seaweed, obtained by a water extraction process, has a concentration of 10% (w / v), is rich in growth regulators and trace elements, can enhance the stress resistance of fruit trees, and improve the adaptability and yield of fruit trees. Compared with other plants, seaweed has the advantages of high yield and low cost.

[0042] The binder of the present invention is xanthan gum, which is used as an auxiliary material for particle forming and is used to adjust the particle size and stability of the organic fertilizer, so as to facilitate application and storage.

[0043] The raw materials used in the examples of the present invention are all commercially available raw materials.

[0044] Embodiment 1:

[0045] An organic fertilizer for improving fruit tree planting soil is prepared by the following steps:

[0046] (1) Weighing of raw materials: The prepared raw materials include 40% by weight of decomposed plant residues, 10% by weight of straw shreds, 10% by weight of microbial agents, 25% by weight of bentonite, 10% by weight of plant extracts, and 5% by weight of xanthan gum.

[0047] (2) The decomposed plant residues are crushed into particles with a size of less than 5 mm, and the crushed decomposed plant residues are placed in a blender.

[0048] (3) The microbial agent is mixed evenly with 70% of fine powdered bentonite with a particle size of less than 0.5 mm to form a microbial agent mixture.

[0049] (4) Spray the plant extract with a concentration of 10% (w / v) evenly on the decomposed plant residues in step (1), and stir at a speed of 500 rpm for 5 minutes to ensure sufficient mixing.

[0050] (5) Add the bacterial agent mixture obtained in step (3), chopped straw, the remaining (30%) bentonite and xanthan gum to the mixture in step (4), and stir the mixture in a stirrer at a speed of 500 rpm for 10 minutes to form a moist and viscous material.

[0051] (6) The uniformly mixed material in step (5) is fed into a granulator for granulation, and the particle size is between 5-10 mm.

[0052] (7) The prepared granules are sent to a dryer and dried at 50-60° C. until the moisture content is less than 15%, thereby obtaining a finished organic fertilizer.

[0053] Embodiment 2:

[0054] An organic fertilizer for improving fruit tree planting soil is prepared by the following steps:

[0055] (1) Weighing of raw materials: Among the prepared raw materials, decomposed plant residues account for 45% of the total weight, straw shreds account for 9% of the total weight, microbial agents account for 10% of the total weight, bentonite accounts for 23% of the total weight, plant extracts account for 10% of the total weight, and xanthan gum accounts for 3% of the total weight.

[0056] (2) The decomposed plant residues are crushed into particles with a size of less than 5 mm, and the crushed decomposed plant residues are placed in a blender.

[0057] (3) The microbial agent is mixed evenly with 70% of fine powdered bentonite with a particle size of less than 0.5 mm to form a microbial agent mixture.

[0058] (4) Spray the plant extract with a concentration of 10% (w / v) evenly on the decomposed plant residues in step (1), and stir at a speed of 500 rpm for 5 minutes to ensure sufficient mixing.

[0059] (5) Add the bacterial agent mixture obtained in step (3), chopped straw, the remaining (30%) bentonite and xanthan gum to the mixture in step (4), and stir the mixture in a stirrer at a speed of 500 rpm for 10 minutes to form a moist and viscous material.

[0060] (6) The uniformly mixed material in step (5) is fed into a granulator for granulation, and the particle size is between 5-10 mm.

[0061] (7) The prepared granules are sent to a dryer and dried at 50-60° C. until the moisture content is less than 15%, thereby obtaining a finished organic fertilizer.

[0062] Embodiment three:

[0063] An organic fertilizer for improving fruit tree planting soil is prepared by the following steps:

[0064] (1) Weighing of raw materials: The prepared raw materials include 50% by weight of decomposed plant residues, 9% by weight of straw shreds, 9% by weight of microbial agents, 20% by weight of bentonite, 9% by weight of plant extracts, and 3% by weight of xanthan gum.

[0065] (2) The decomposed plant residues are crushed into particles with a size of less than 5 mm, and the crushed decomposed plant residues are placed in a blender.

[0066] (3) The microbial agent is mixed evenly with 70% of fine powdered bentonite with a particle size of less than 0.5 mm to form a microbial agent mixture.

[0067] (4) Spray the plant extract with a concentration of 10% (w / v) evenly on the decomposed plant residues in step (1), and stir at a speed of 500 rpm for 5 minutes to ensure sufficient mixing.

[0068] (5) Add the bacterial agent mixture obtained in step (3), chopped straw, the remaining (30%) bentonite and xanthan gum to the mixture in step (4), and stir the mixture in a stirrer at a speed of 500 rpm for 10 minutes to form a moist and viscous material.

[0069] (6) The uniformly mixed material in step (5) is fed into a granulator for granulation, and the particle size is between 5-10 mm.

[0070] (7) The prepared granules are sent to a dryer and dried at 50-60° C. until the moisture content is less than 15%, thereby obtaining a finished organic fertilizer.

[0071] In order to verify the improvement effect of the organic fertilizer of the present invention on the soil for fruit tree planting, a field test was conducted. Fruit trees of the same variety and similar growth were selected as test objects, and the organic fertilizer of the present invention and traditional chemical fertilizer were used as controls.

[0072] In order to verify the improvement effect of the organic fertilizer of the present invention on fruit tree planting, a planting experiment was conducted. Among them, the planting soil type is loam; the initial organic matter content is 2%; the fertilizer amount is 5kg per tree; the initial pH value is 6.5; the fertilization time is before budding in spring; the irrigation management is irrigation on demand to keep the soil moist; the fruit tree type is pear tree; the monitoring period is one growing season; the fertilization method is hole fertilization; the number of fertilization is one time; the monitoring period is 30 days, 60 days, and 90 days after fertilization.

[0073] In the following charts, Table 1 shows the improvement effect data of the organic fertilizer of the present invention on fruit tree planting, and Table 2 shows the improvement effect data of the traditional organic fertilizer without adding straw crushed on fruit tree planting. The sugar content of the fruit is measured using a saccharimeter, and the specific standard refers to GB5009.8-2016 "National Food Safety Standard Determination of Fructose, Glucose, Sucrose, Maltose and Lactose in Food".

[0074] Comparative Example 1 in Table 2: Based on Example 2, 9% of the straw shreds in step (5) were removed, and the decomposed plant residues were changed to 54%, and the rest was the same as Example 2.

[0075] Comparative Example 2 in Table 2: Based on Example 2, 9% of the straw shreds in step (5) are removed, the decomposed plant residues are changed to 50%, the plant extracts are changed to 12%, and the xanthan gum is changed to 5%. The rest is the same as Example 2.

[0076] Comparative Example 3 in Table 2: Based on Example 2, 9% of the straw shreds in step (5) are removed, the decomposed plant residues are changed to 50%, and the plant extracts are changed to 14%. The rest is the same as Example 2.

[0077]

[0078] Table 1

[0079]

[0080] Table 2

[0081] In Table 1 and the accompanying drawings Figure 2 In the observation data shown, during the three key detection periods of 30 days, 60 days and 90 days, the content of organic matter showed a relatively stable trend, without showing a significant decreasing trend, maintaining the balance of soil fertility, and the growth height of the plants and the sugar content of the fruits reached a relatively high level.

[0082] In Table 2 and the accompanying drawings Figure 3In the observation data shown, within the three key detection periods of 30 days, 60 days and 90 days, the content of organic matter showed a clear downward trend, and the balance of soil fertility was not maintained. In addition, the growth height of the plants and the sugar content of the fruits were lower than the levels of organic fertilizer in Table 1 due to the rapid loss of organic matter.

[0083] Comparing the data analysis results of Table 1 and Table 2, it is shown that under the condition of only one fertilization treatment in a growing season, the use of organic fertilizer granules with straw shreds as fertilizer can effectively regulate the dissolution rate of organic matter into the soil, prevent it from being integrated into the soil matrix too quickly, and thus reduce the risk of organic matter loss caused by natural factors such as rain erosion. It ensures that the plants can continue to obtain a stable supply of organic matter throughout the growth cycle, especially in the late growth period, effectively preventing the growth restriction problem that may be caused by the lack of organic matter, and has a significant promoting effect on the healthy growth and development of the plants.

[0084] In order to verify the improvement effect of the organic fertilizer of the present invention on the flora in the soil for fruit tree planting, relevant experiments were conducted. The selected soil type was sandy loam; the initial pH value was 6.5; the initial organic matter content was 2%; the inoculation amount was 10^6 CFU per kilogram of soil; the inoculation time was applied at the same time as the organic fertilizer; the cultivation temperature was 25°C; and the detection period was 30 days, 60 days, and 90 days after inoculation.

[0085] In the following charts, Table 3 shows the reproduction and community diversity index of microorganisms in the organic fertilizer of the present invention, Table 2 shows the reproduction and community diversity index of microorganisms in the traditional organic fertilizer without the addition of bentonite, and the soil microbial community diversity index is analyzed by the fatty acid biomarker method. The specific standard refers to GB / T32725 "Guide for Aerobic Collection, Processing and Storage of Soil for Laboratory Determination of Microbial Processes, Biomass and Diversity".

[0086] Comparative Example 1 in Table 4: Based on Example 2, 23% of the bentonite in steps (3) and (5) was removed, and the decomposed plant residues were changed to 68%, and the rest was the same as Example 2.

[0087] Comparative Example 2 in Table 4: Based on Example 2, 23% of bentonite in steps (3) and (5) is removed, the decomposed plant residues are changed to 60%, the plant extracts are changed to 14%, and the xanthan gum is changed to 7%. The rest is the same as Example 2.

[0088] Comparative Example 3 in Table 4: Based on Example 2, 23% of bentonite in steps (3) and (5) is removed, the decomposed plant residues are changed to 60%, the plant extract is changed to 18%, and the rest is the same as Example 2.

[0089]

[0090] Table 3

[0091]

[0092] Table 4

[0093] By analyzing the experimental data comparison results in Table 3 and Table 4, it can be seen that the addition of bentonite has promoted a significant increase in the number of microbial populations in organic fertilizers, and this phenomenon is intuitively reflected by the significant increase in microbial counts. The soil microbial community diversity index has undergone a significant positive change, indicating that the richness and uniformity of the microbial community structure have been optimized. The increase in microbial communities not only enhances the biological activity of the soil, but also promotes the metabolic activities of microorganisms, including key ecological processes such as nutrient transformation and organic matter decomposition. The activities of microorganisms directly contribute to the comprehensive improvement of soil fertility, and provide a more fertile soil environment for the healthy growth of fruit trees through multiple mechanisms such as improving soil structure, increasing nutrient availability, and inhibiting soil pests.

[0094] According to the data analysis of Table 1 and Table 3, the optimal ratio of decomposed plant residues, straw fragments, microbial agents, mineral powders, plant extracts and binders is adjusted to 45:9:10:23:10:3. This ratio can not only maintain the long-term stable input of organic matter in the soil, effectively avoid the phenomenon of plant growth stunting due to the lack of organic matter, and significantly promote the growth and development of plants, but also provide an ideal microenvironment for the proliferation and activity of microbial communities, further enhance the comprehensive fertility and biological activity of the soil, and make a positive contribution to the sustainable development of agricultural production.

[0095] The organic fertilizer of the present invention is mainly made of natural raw materials, does not contain chemical synthetic substances, will not cause soil and environmental pollution after application, and is in line with the development concept of green agriculture.

[0096] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An organic fertilizer for improving fruit tree planting soil, characterized in that: The organic fertilizer is mainly composed of the following raw materials: decomposed plant residues accounting for 40-50% of the total mass, straw fragments accounting for 5-10% of the total mass, microbial agents accounting for 5-10% of the total mass, mineral powder accounting for 20-30% of the total mass, plant extracts accounting for 5-10% of the total mass and a binder accounting for 1-5% of the total mass.

2. A method for preparing an organic fertilizer for improving fruit tree planting soil according to claim 1, comprising the following steps: (1) crushing the decomposed plant residues into a suitable particle size, and placing the prepared decomposed plant residues in a mixer; (2) mixing the microbial agent and a portion (70%) of the mineral powder evenly to form a microbial agent mixture; (3) spraying the plant extract in liquid form evenly on the decomposed plant residues of step (1), stirring at a speed of 500 rpm for 5 minutes to ensure sufficient mixing; (4) adding the inoculum mixture obtained in step (2), chopped straw, the remaining (30%) mineral powder and the binder to the mixture in step (3), stirring the mixture in a stirrer at a speed of 500 rpm for 10 minutes to form a wet and sticky material; (5) feeding the uniformly mixed material in step (4) into a granulator for granulation, wherein the particle size is between 5 and 10 mm; (6) The prepared granules are sent to a dryer and dried at 50-60° C. until the moisture content is less than 15%, thereby obtaining a finished organic fertilizer.

3. The organic fertilizer for improving soil for fruit tree planting according to claim 1, characterized in that: The decomposed plant residues include a mixture of fallen leaves, fruit residues and other plants, and reach the decomposition standard after 6 months of composting treatment.

4. The organic fertilizer for improving soil for fruit tree planting according to claim 2, characterized in that: The crushed particle size of the decomposed plant residues is less than 5 mm, and the length of the crushed straw is 1-3 mm.

5. The organic fertilizer for improving soil for fruit tree planting according to claim 2, characterized in that: The microbial agent comprises nitrogen-fixing bacteria, phosphate-solubilizing bacteria, potassium-solubilizing bacteria and lactic acid bacteria, and the number of viable bacteria of each species in the agent is not less than 100 million CFU / g.

6. The organic fertilizer for improving soil for fruit tree planting according to claim 5, characterized in that: The nitrogen-fixing bacteria, phosphate-solubilizing bacteria, potassium-solubilizing bacteria and lactic acid bacteria are mixed in a ratio of 1:1:1:

1.

7. The organic fertilizer for improving fruit tree planting soil according to claim 1, characterized in that: The mineral powder is bentonite.

8. The organic fertilizer for improving fruit tree planting soil according to claim 7, characterized in that: The bentonite is in fine powder form, with a particle size of less than 0.5 mm.

9. The organic fertilizer for improving soil for fruit tree planting according to claim 2, characterized in that: The plant extract is derived from seaweed, obtained through a water extraction process, and has a concentration of 10% (w / v).

10. The organic fertilizer for improving fruit tree planting soil according to claim 1, characterized in that: The binder is xanthan gum, which is used as an auxiliary material for particle forming.

Images