Preparation method of nutritional organic fertilizer

Abstract

The invention relates to the technical field of fertilizers, and discloses a preparation method of a nutritional organic fertilizer, the nutritional organic fertilizer is formed by mixing pig manure, straw, humic acid powder, manioc waste, a biological fermentation fertilizer, plant ash, diatomite and an anti-caking agent as main raw materials, the biological fermentation fertilizer is formed by fermenting pine needles as a main raw material, and the biological fermentation fertilizer is formed by mixing the straw, the humic acid powder, the manioc waste, the plant ash, the diatomite and the anti-caking agent. According to the method, pine needles are scientifically selected as a fermentation material, combustible matter under pine forests is removed, the forest fire occurrence rate is reduced, a pine needle pretreatment technical route is formulated, and the stable and reliable quality of the fermentation material is ensured by reasonably controlling fermentation conditions, strengthening management and monitoring and timely finding and treating abnormal conditions; through cooperative application of pig manure, a biological fermentation fertilizer and other fertilizers, nutrient waste and soil pollution are avoided. The fertilizer has good field application effect, is very safe to crops, does not burn seedlings, and has the advantages of root promotion, seedling strengthening, disease resistance, water retention, fertilizer retention and the like.

Description

Technical Field

[0001] The invention relates to the technical field of fertilizers, and in particular to a method for preparing nutrient organic fertilizers. Background Art

[0002] In modern agriculture, nutritional organic fertilizer, as an environmentally friendly and efficient type of fertilizer, is gradually gaining favor among farmers. It can not only effectively improve soil fertility and soil structure, but also promote the healthy growth of crops and improve the quality of agricultural products. Nutritional organic fertilizer refers to a fertilizer with organic matter as the main component, containing various nutrients required for crop growth, which has the advantages of stable fertilizer effect, comprehensive nutrients, and improved soil after harmless treatment and composting and fermentation. It mainly includes human and poultry excrement, green manure, crop straw, firewood, fallen leaves, biogas fertilizer, etc., as well as commercial organic fertilizers obtained through industrial production.

[0003] The characteristics of nutrient organic fertilizers are mainly reflected in the following aspects: High organic matter content: Organic fertilizers are rich in organic matter. These organic matter can release a large amount of nutrients for crops to absorb and utilize after being decomposed by microorganisms in the soil.

[0004] Comprehensive nutrients: Organic fertilizers contain a variety of macro-elements such as nitrogen, phosphorus, potassium, as well as a variety of trace elements such as calcium, magnesium, sulfur, zinc, boron, etc., which can meet the needs of crops for a variety of nutrients during growth.

[0005] Improve soil: Organic fertilizer can improve the physical and chemical properties of the soil, increase soil permeability and water and fertilizer retention capacity, reduce the content of heavy metals in the soil, and promote soil microbial activity, thereby forming a good soil ecological environment.

[0006] Improve the quality of agricultural products: The use of organic fertilizers can significantly improve the quality of agricultural products, making the fruits brighter in color, more uniform in size, and more mature and concentrated. The sugar content, sugar-acid ratio, and vitamin content of melon agricultural products are also increased.

[0007] At present, in order to improve the fertility of nutritious organic fertilizers, fermentation materials are generally added to the fertilizers. After adding fermentation materials, the decomposition rate of organic matter in organic fertilizers is accelerated, and nutrients are released more quickly, which can meet the nutrient needs of crops during growth, thereby improving the yield-increasing effect of fertilizers. At the same time, the microbial activities in the fermentation materials can improve the physical and chemical properties of the soil, improve the permeability and water and fertilizer retention capacity of the soil, promote the reproduction and activity of soil microorganisms, and form a good soil ecological environment. In addition, the beneficial microorganisms in the fermentation materials can stimulate the root growth and absorption capacity of crops, improve the stress resistance of crops, and enable them to better adapt to adverse environments such as low temperature, drought, and disease. Therefore, in the production process of organic fertilizers, adding fermentation materials has become an important link.

[0008] Pine needles are a renewable natural resource with a wide distribution range. After pine needles dry and fall, some nutrients are decomposed and lost, but most nutrients can exist in a more stable way. Therefore, larch needles are a unique raw material for making organic fertilizers. The protein, amino acids, trace elements and active substances rich in pine needles all play an important role in crop growth. Based on this, the present invention uses pine needles as raw materials to produce nutritious organic fertilizers, which can achieve efficient utilization of pine needles. Summary of the invention

[0009] 1. Technical issues to be resolved In view of the deficiencies of the prior art, the present invention provides a method for preparing a nutrient organic fertilizer.

[0010] (II) Technical solution A method for preparing a nutrient organic fertilizer, the nutrient organic fertilizer comprising the following raw materials in parts by weight: 36-45 parts of pig manure, 20-28 parts of straw, 15-25 parts of humic acid powder, 10-16 parts of cassava residue, 5-10 parts of biological fermentation fertilizer, 20-30 parts of plant ash, 6-12 parts of diatomaceous earth, and 1-3 parts of an anticaking agent; The preparation method comprises the following steps: The first step is to add pig manure, straw, humic acid powder, cassava residue, biological fermentation fertilizer, wood ash and diatomaceous earth into a mixing kettle, start stirring, and mechanically stir and mix at a stirring rate of 1000-2000r / min for 20-60min to form a fertilizer mixture; The second step is to adjust the stirring rate to 200-300r / min, then add the anti-caking agent to the fertilizer mixture, continue stirring for 20-30min, discharge the material, and can it to obtain nutritious organic fertilizer.

[0011] As a further embodiment of the present invention, the method for preparing the biological fermentation fertilizer comprises the following steps: Step 1: Take pine needles, put them into a grinder, grind them, pass them through an 80-100 mesh sieve to form pine needle powder, and then mix the pine needle powder with earthworm castings in a mass ratio of 2:1 to form a fermentation material; Step 2: ferment the fermented material using the strip-piling method, add lactic acid bacteria, and after inoculation, use a self-propelled turning machine to turn the fermented material for fermentation; Step 3: During the fermentation process, the temperature of the straw pile is recorded every day. When the temperature of the straw pile is less than 50°C, the fermented material is rolled into a ball and then thrown to the ground to spread out, and the fermentation is continued. After the fermentation is completed, the fermented material is aged for 30-50 days; Step 4: Crush the fermented organic material and pass it through a 50-60 mesh sieve to obtain biological fermentation fertilizer.

[0012] As a further embodiment of the present invention, in step 1, the humidity of the pine needles is 30±5%.

[0013] As a further solution of the present invention, in step 2, the height of the strip stack is 1-1.5 m, the width is 1-2 m, and the length is 10-20 m.

[0014] As a further solution of the present invention, in step 2, the amount of lactic acid bacteria added is 1-2% of the mass of the fermentation material.

[0015] As a further embodiment of the present invention, in step three, the fermentation time is 10-12 days.

[0016] As a further solution of the present invention, in step three, the temperature during the aging treatment is 50-60°C and the humidity is 60-70%.

[0017] As a further embodiment of the present invention, the anti-caking agent is a mixture of silicon dioxide, light calcium, sodium tripolyphosphate and talc.

[0018] As a further embodiment of the present invention, the mass ratio of silicon dioxide, light calcium, sodium tripolyphosphate and talc is 1:0.8-1:0.4-0.6:0.4-0.6.

[0019] 3. Beneficial technical effects (1) The present invention solves the problem of combustible cleaning under pine forests and reduces the incidence of forest fires by scientifically selecting pine needles as fermentation materials, and develops a pine needle pretreatment technology route to facilitate large-scale industrial production. In addition, by reasonably controlling fermentation conditions and strengthening management and monitoring, abnormal situations are discovered and handled in a timely manner, thereby ensuring the stable and reliable quality of the fermentation materials. At the same time, lactic acid bacteria can produce lactic acid during the fermentation process, which helps to increase the acidity of organic fertilizers, thereby increasing soil fertility and crop quality.

[0020] (2) The present invention avoids nutrient waste and soil pollution by applying pig manure, bio-fermented fertilizer and other fertilizers in combination. The field application has good effect, is very safe for crops, does not burn seedlings, and has the advantages of promoting root growth, strengthening seedlings, resisting diseases, retaining water and fertilizer, etc. DETAILED DESCRIPTION

[0021] In order to facilitate the understanding of the present invention, the present invention will be described more fully below. Preferred embodiments of the present invention are given below. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the understanding of the disclosure of the present invention more thorough and comprehensive.

[0022] Example 1 A nutritious organic fertilizer comprises the following raw materials in parts by weight: 36 parts of pig manure, 20 parts of straw, 15 parts of humic acid powder, 10 parts of cassava residue, 5 parts of biological fermentation fertilizer, 20 parts of plant ash, 6 parts of diatomaceous earth, and 1 part of anticaking agent; The preparation method of the nutrient organic fertilizer comprises the following steps: The first step is to add pig manure, straw, humic acid powder, cassava residue, biological fermentation fertilizer, wood ash and diatomaceous earth into a mixing kettle, start stirring, and mechanically stir and mix at a stirring rate of 1000r / min for 60min to form a fertilizer mixture; The second step is to adjust the stirring rate to 200r / min, then add the anti-caking agent to the fertilizer mixture, continue stirring for 30 minutes, discharge the material, and can it to obtain nutritious organic fertilizer.

[0023] The preparation method of the biological fermentation fertilizer comprises the following steps: Step 1: Take pine needles with a humidity of 25%, put them into a grinder, grind them, pass them through an 80-mesh sieve to form pine needle powder, and then mix 5 kg of pine needle powder with 2.5 kg of earthworm castings to form a fermentation material; Step 2: Use the strip stacking method, set the strip stacking height to 1m, width to 1m, and length to 10m, ferment the fermentation material, and add 0.075kg of lactic acid bacteria. After the inoculation, use a self-propelled turning machine to turn the material for fermentation; Step 3: During the fermentation process, the temperature of the straw pile is recorded every day. When the temperature of the straw pile is less than 50°C, the fermented material is rolled into a ball and then thrown to the ground to disperse. The fermentation is continued for 10 days. After the fermentation is completed, the fermented material is aged for 30 days at a temperature of 50°C and a humidity of 60%. Step 4: Crush the fermented organic material and pass it through a 50-mesh sieve to obtain biological fermentation fertilizer.

[0024] The anticaking agent is a mixture of silicon dioxide, light calcium, sodium tripolyphosphate and talc in a mass ratio of 1:0.8:0.4:0.4.

[0025] Example 2 A nutritious organic fertilizer comprises the following raw materials in parts by weight: 38 parts of pig manure, 22 parts of straw, 16 parts of humic acid powder, 12 parts of cassava residue, 6 parts of biological fermentation fertilizer, 22 parts of plant ash, 8 parts of diatomaceous earth, and 1.5 parts of anticaking agent; The preparation method of the nutrient organic fertilizer comprises the following steps: The first step is to add pig manure, straw, humic acid powder, cassava residue, biological fermentation fertilizer, wood ash and diatomaceous earth into a mixing kettle, start stirring, and mechanically stir and mix at a stirring rate of 1500r / min for 50min to form a fertilizer mixture; The second step is to adjust the stirring rate to 250r / min, then add the anti-caking agent to the fertilizer mixture, continue stirring for 25 minutes, discharge the material, and can it to obtain nutritious organic fertilizer.

[0026] The preparation method of the biological fermentation fertilizer comprises the following steps: Step 1: Take pine needles with a humidity of 30%, put them into a grinder, grind them, pass them through a 100-mesh sieve to form pine needle powder, and then mix 5 kg of pine needle powder with 2.5 kg of earthworm castings to form a fermentation material; Step 2: Use the strip stacking method, set the strip stacking height to 1m, width to 1m, and length to 12m, ferment the fermentation material, and add 0.08kg of lactic acid bacteria. After the inoculation, use a self-propelled turning machine to turn and ferment; Step 3: During the fermentation process, the temperature of the straw pile is recorded every day. When the temperature of the straw pile is less than 50°C, the fermented material is rolled into a ball and then thrown to the ground to spread out. The fermentation is continued for 12 days. After the fermentation is completed, the fermented material is aged for 40 days at a temperature of 55°C and a humidity of 65%. Step 4: Crush the fermented organic material and pass it through a 50-mesh sieve to obtain biological fermentation fertilizer.

[0027] The anti-caking agent is a mixture of silicon dioxide, light calcium, sodium tripolyphosphate and talc in a mass ratio of 1:0.8:0.5:0.5.

[0028] Example 3 A nutritious organic fertilizer comprises the following raw materials in parts by weight: 40 parts of pig manure, 25 parts of straw, 18 parts of humic acid powder, 14 parts of cassava residue, 6 parts of biological fermentation fertilizer, 24 parts of plant ash, 9 parts of diatomaceous earth, and 2 parts of anticaking agent; The preparation method of the nutrient organic fertilizer comprises the following steps: The first step is to add pig manure, straw, humic acid powder, cassava residue, biological fermentation fertilizer, wood ash and diatomaceous earth into a mixing kettle, start stirring, and mechanically stir and mix at a stirring rate of 1500r / min for 40min to form a fertilizer mixture; The second step is to adjust the stirring rate to 250r / min, then add the anti-caking agent to the fertilizer mixture, continue stirring for 25 minutes, discharge the material, and can it to obtain nutritious organic fertilizer.

[0029] The preparation method of the biological fermentation fertilizer comprises the following steps: Step 1: Take pine needles with a humidity of 30%, put them into a grinder, grind them, pass them through a 100-mesh sieve to form pine needle powder, and then mix 5 kg of pine needle powder with 2.5 kg of earthworm castings to form a fermentation material; Step 2: Use the strip stacking method to set the strip stacking height to 1.5m, width to 1.5m, and length to 15m, ferment the fermentation material, and add 0.08kg of lactic acid bacteria. After the inoculation, use a self-propelled turning machine to turn the material for fermentation; Step 3: During the fermentation process, the temperature of the straw pile is recorded every day. When the temperature of the straw pile is less than 50°C, the fermented material is rolled into a ball and then thrown to the ground to spread out. The fermentation is continued for 12 days. After the fermentation is completed, the fermented material is aged for 40 days at a temperature of 55°C and a humidity of 65%. Step 4: Crush the fermented organic material and pass it through a 60-mesh sieve to obtain biological fermentation fertilizer.

[0030] The anti-caking agent is a mixture of silicon dioxide, light calcium, sodium tripolyphosphate and talc in a mass ratio of 1:0.8:0.5:0.6.

[0031] Example 4 A nutritious organic fertilizer comprises the following raw materials in parts by weight: 42 parts of pig manure, 26 parts of straw, 20 parts of humic acid powder, 15 parts of cassava residue, 6 parts of biological fermentation fertilizer, 26 parts of plant ash, 10 parts of diatomaceous earth, and 2 parts of anticaking agent; The preparation method of the nutrient organic fertilizer comprises the following steps: The first step is to add pig manure, straw, humic acid powder, cassava residue, biological fermentation fertilizer, wood ash and diatomaceous earth into a mixing kettle, start stirring, and mechanically stir and mix at a stirring rate of 1500r / min for 30min to form a fertilizer mixture; The second step is to adjust the stirring rate to 250r / min, then add the anti-caking agent to the fertilizer mixture, continue stirring for 25 minutes, discharge the material, and can it to obtain nutritious organic fertilizer.

[0032] The preparation method of the biological fermentation fertilizer comprises the following steps: Step 1: Take pine needles with a humidity of 30%, put them into a grinder, grind them, pass them through a 100-mesh sieve to form pine needle powder, and then mix 5 kg of pine needle powder with 2.5 kg of earthworm castings to form a fermentation material; Step 2: Use the strip stacking method to set the strip stacking height to 1.5m, the width to 2m, and the length to 15m, ferment the fermentation material, and add 0.08kg of lactic acid bacteria. After the inoculation, use a self-propelled turning machine to turn the material for fermentation; Step 3: During the fermentation process, the temperature of the straw pile is recorded every day. When the temperature of the straw pile is less than 50°C, the fermented material is rolled into a ball and then thrown to the ground to spread out. The fermentation is continued for 12 days. After the fermentation is completed, the fermented material is aged for 50 days at a temperature of 55°C and a humidity of 68%. Step 4: Crush the fermented organic material and pass it through a 60-mesh sieve to obtain biological fermentation fertilizer.

[0033] The anticaking agent is a mixture of silicon dioxide, light calcium, sodium tripolyphosphate and talc in a mass ratio of 1:1:0.6:0.5.

[0034] Example 5 A nutritious organic fertilizer comprises the following raw materials in parts by weight: 44 parts of pig manure, 26 parts of straw, 24 parts of humic acid powder, 15 parts of cassava residue, 8 parts of biological fermentation fertilizer, 28 parts of plant ash, 10 parts of diatomaceous earth, and 2.5 parts of anticaking agent; The preparation method of the nutrient organic fertilizer comprises the following steps: The first step is to add pig manure, straw, humic acid powder, cassava residue, biological fermentation fertilizer, wood ash and diatomaceous earth into a mixing kettle, start stirring, and mechanically stir and mix at a stirring rate of 1800r / min for 30min to form a fertilizer mixture; The second step is to adjust the stirring rate to 250r / min, then add the anti-caking agent to the fertilizer mixture, continue stirring for 25 minutes, discharge the material, and can it to obtain nutritious organic fertilizer.

[0035] The preparation method of the biological fermentation fertilizer comprises the following steps: Step 1: Take pine needles with a humidity of 5%, put them into a grinder, grind them, pass them through a 100-mesh sieve to form pine needle powder, and then mix 5 kg of pine needle powder with 2.5 kg of earthworm castings to form a fermentation material; Step 2: Use the strip stacking method to set the strip stacking height to 1.5m, the width to 2m, and the length to 20m, ferment the fermentation material, and add 0.1kg of lactic acid bacteria. After the inoculation, use a self-propelled turning machine to turn the material for fermentation; Step 3: During the fermentation process, the temperature of the straw pile is recorded every day. When the temperature of the straw pile is less than 50°C, the fermented material is rolled into a ball and then thrown to the ground to spread out. The fermentation is continued for 12 days. After the fermentation is completed, the fermented material is aged for 50 days at a temperature of 55°C and a humidity of 65%. Step 4: Crush the fermented organic material and pass it through a 60-mesh sieve to obtain biological fermentation fertilizer.

[0036] The anti-caking agent is a mixture of silicon dioxide, light calcium, sodium tripolyphosphate and talc in a mass ratio of 1:1:0.6:0.6.

[0037] Example 6 A nutritious organic fertilizer comprises the following raw materials in parts by weight: 45 parts of pig manure, 28 parts of straw, 25 parts of humic acid powder, 16 parts of cassava residue, 10 parts of biological fermentation fertilizer, 30 parts of plant ash, 12 parts of diatomaceous earth, and 3 parts of anticaking agent; The preparation method of the nutrient organic fertilizer comprises the following steps: The first step is to add pig manure, straw, humic acid powder, cassava residue, biological fermentation fertilizer, wood ash and diatomaceous earth into a mixing kettle, start stirring, and mechanically stir and mix at a stirring rate of 2000r / min for 20min to form a fertilizer mixture; The second step is to adjust the stirring rate to 300r / min, then add the anti-caking agent to the fertilizer mixture, continue stirring for 20 minutes, discharge the material, and can it to obtain nutritious organic fertilizer.

[0038] The preparation method of the biological fermentation fertilizer comprises the following steps: Step 1: Take pine needles with a humidity of 35%, put them into a grinder, grind them, pass them through a 100-mesh sieve to form pine needle powder, and then mix 5 kg of pine needle powder with 2.5 kg of earthworm castings to form a fermentation material; Step 2: Use the strip stacking method to set the strip stacking height to 1.5m, the width to 2m, and the length to 20m, ferment the fermentation material, and add 0.15kg of lactic acid bacteria. After the inoculation, use a self-propelled turning machine to turn the material for fermentation; Step 3: During the fermentation process, the temperature of the straw pile is recorded every day. When the temperature of the straw pile is less than 50°C, the fermented material is rolled into a ball and then thrown to the ground to disperse. The fermentation is continued for 12 days. After the fermentation is completed, the fermented material is aged for 50 days at a temperature of 60°C and a humidity of 70%. Step 4: Crush the fermented organic material and pass it through a 60-mesh sieve to obtain biological fermentation fertilizer.

[0039] The anti-caking agent is a mixture of silicon dioxide, light calcium, sodium tripolyphosphate and talc in a mass ratio of 1:1:0.6:0.6.

[0040] Comparative Example 1 A nutritious organic fertilizer comprises the following raw materials in parts by weight: 42 parts of pig manure, 26 parts of straw, 20 parts of humic acid powder, 15 parts of cassava residue, 26 parts of plant ash, 10 parts of diatomaceous earth, and 2 parts of anticaking agent; The preparation method of the nutrient organic fertilizer comprises the following steps: The first step is to add pig manure, straw, humic acid powder, cassava residue, wood ash and diatomaceous earth into a mixing kettle, start stirring, and mechanically stir and mix at a stirring rate of 1500r / min for 30min to form a fertilizer mixture; The second step is to adjust the stirring rate to 250r / min, then add the anti-caking agent to the fertilizer mixture, continue stirring for 25 minutes, discharge the material, and can it to obtain nutritious organic fertilizer.

[0041] The preparation method of the biological fermentation fertilizer comprises the following steps: Step 1: Take pine needles with a humidity of 30%, put them into a grinder, grind them, pass them through a 100-mesh sieve to form pine needle powder, and then mix 5 kg of pine needle powder with 2.5 kg of earthworm castings to form a fermentation material; Step 2: Use the strip stacking method to set the strip stacking height to 1.5m, the width to 2m, and the length to 15m, ferment the fermentation material, and add 0.08kg of lactic acid bacteria. After the inoculation, use a self-propelled turning machine to turn the material for fermentation; Step 3: During the fermentation process, the temperature of the straw pile is recorded every day. When the temperature of the straw pile is less than 50°C, the fermented material is rolled into a ball and then thrown to the ground to spread out. The fermentation is continued for 12 days. After the fermentation is completed, the fermented material is aged for 50 days at a temperature of 55°C and a humidity of 68%. Step 4: Crush the fermented organic material and pass it through a 60-mesh sieve to obtain biological fermentation fertilizer.

[0042] The anticaking agent is a mixture of silicon dioxide, light calcium, sodium tripolyphosphate and talc in a mass ratio of 1:1:0.6:0.5.

[0043] Test Case Plant tomato seedlings in an area of ​​100m 2 160 seedlings were randomly selected from the smart greenhouse and divided into 8 groups. The first four groups were fertilized with the nutrient organic fertilizers in Examples 1 to 6 and Comparative Example 1, respectively. The remaining group was the control group, and no fertilizer was applied. After culturing for 1 month, the third side branch was selected from the root upward, and the fifth leaf from the outside to the inside was marked to measure parameters such as plant height and weight. The test results are shown in Table 1: The test results are shown in the table below: Plant height / cm Weight / g / plant Soluble sugar / % Example 1 112.4 611.8 6.4 Example 2 112.9 613.0 6.5 Example 3 113.4 612.6 6.5 Example 4 113.1 613.2 6.7 Example 5 113.0 613.1 6.4 Example 6 113.1 612.9 6.5 Comparative Example 1 101.9 591.4 6.0 Control group 78.7 512.8 4.8 Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core ideas, including the best mode, and also enable any technician in the field to practice the present invention, including making and using any device or system, and implementing any combined method. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, the present invention can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the present invention. The scope of patent protection of the present invention is defined by the claims and may include other embodiments that can be thought of by those skilled in the art. If these other embodiments have structural elements similar to the literal expression of the claims, or if they include equivalent structural elements that are not substantially different from the literal expression of the claims, then these other embodiments should also be included in the scope of the claims.

[0044] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements will not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for preparing a nutritious organic fertilizer, characterized in that: The nutrient organic fertilizer comprises the following raw materials in parts by weight: 36-45 parts of pig manure, 20-28 parts of straw, 15-25 parts of humic acid powder, 10-16 parts of cassava residue, 5-10 parts of biological fermentation fertilizer, 20-30 parts of plant ash, 6-12 parts of diatomaceous earth, and 1-3 parts of anticaking agent; The preparation method comprises the following steps: The first step is to add pig manure, straw, humic acid powder, cassava residue, biological fermentation fertilizer, wood ash and diatomaceous earth into a mixing kettle, start stirring, and mechanically stir and mix at a stirring rate of 1000-2000r / min for 20-60min to form a fertilizer mixture; The second step is to adjust the stirring rate to 200-300r / min, then add the anti-caking agent to the fertilizer mixture, continue stirring for 20-30min, discharge the material, and can it to obtain nutritious organic fertilizer.

2. The method for preparing a nutrient organic fertilizer according to claim 1, characterized in that: The preparation method of the biological fermentation fertilizer comprises the following steps: Step 1: Take pine needles, put them into a grinder, grind them, pass them through an 80-100 mesh sieve to form pine needle powder, and then mix the pine needle powder with earthworm castings in a mass ratio of 2:1 to form a fermentation material; Step 2: ferment the fermented material using the stacking method and inoculate lactic acid bacteria. After the inoculation, use a self-propelled turning machine to turn the fermented material for fermentation; Step 3: During the fermentation process, the temperature of the straw pile is recorded every day. When the temperature of the straw pile is less than 50°C, the fermented material is rolled into a ball and then thrown to the ground to spread out, and the fermentation is continued. After the fermentation is completed, the fermented material is aged for 30-50 days; Step 4: Crush the fermented organic material and pass it through a 50-60 mesh sieve to obtain biological fermentation fertilizer.

3. The method for preparing a nutrient organic fertilizer according to claim 2, characterized in that: In step 1, the humidity of the pine needles is 30±5%.

4. The method for preparing a nutrient organic fertilizer according to claim 2, characterized in that: In step 2, the height of the strip stack is 1-1.5m, the width is 1-2m, and the length is 10-20m.

5. The method for preparing a nutrient organic fertilizer according to claim 2, characterized in that: In step 2, the amount of lactic acid bacteria added is 1-2% of the mass of the fermentation material.

6. The method for preparing a nutrient organic fertilizer according to claim 2, characterized in that: In step 3, the fermentation time is 10-12 days.

7. The method for preparing a nutrient organic fertilizer according to claim 2, characterized in that: In step three, the temperature during the aging treatment is 50-60° C. and the humidity is 60-70%.

8. The method for preparing a nutrient organic fertilizer according to claim 1, characterized in that: The anticaking agent is a mixture of silicon dioxide, light calcium, sodium tripolyphosphate and talc.

9. The method for preparing a nutrient organic fertilizer according to claim 8, characterized in that: The invention is characterized in that the mass ratio of silicon dioxide, light calcium, sodium tripolyphosphate and talc is 1:0.8-1:0.4-0.6:0.4-0.6.