Rice field organic fertilizer and preparation method thereof

Abstract

The invention relates to a rice field organic fertilizer preparation method, which comprises: S1, adding straw and rice bran meal into a molasses fermentation liquid, and uniformly stirring to obtain a fermentation raw material; s2, performing primary fermentation on the fermentation product to obtain a primary fermentation product; s3, bentonite is added into the primary fermentation product, secondary fermentation is performed, and a secondary fermentation product is obtained; and S4, concentrating the secondary fermentation product until the water content is 15-20%, thereby obtaining the organic fertilizer. The molasses fermentation liquor is used for preparing the organic fertilizer special for the rice field, and the organic fertilizer can enhance the lodging resistance of the rice and increase the yield of a single plant of the rice, so that the acre yield of the rice is remarkably increased. According to the invention, the recycling of pollutants is realized, and objective economic benefits are generated.

Description

Technical Field

[0001] The present invention belongs to the field of agricultural planting, and more particularly, relates to an organic fertilizer for paddy fields and a preparation method thereof. Background Art

[0002] Rice is one of the most important food crops in the world. In addition to being used directly as food, it can also be used to prepare a variety of products such as starch, wine, sugar, vinegar, feed, etc. It can also be used for industrial and medical purposes.

[0003] Rice requires timely fertilization at different times due to its cultivation environment and growth characteristics. Appropriate fertilization provides sufficient nutrients for rice growth, promoting its growth and development, thereby increasing rice yield. However, while fertilization increases yield, it also carries the risk of lodging due to excessive weight on the rice ears. Therefore, fertilization in rice fields requires a balance between yield and lodging resistance.

[0004] Molasses is a by-product of the sugar industry. Its main components include sucrose, glucose, fructose and other sugars. It also contains a small amount of protein, amino acids, vitamins and mineral elements such as potassium, phosphorus and magnesium. Because molasses is rich in sugar, it is often used for fermentation to produce yeast, monosodium glutamate and other products. However, it produces a large amount of molasses fermentation waste liquid. These waste liquids are rich in organic matter and inorganic salts and cannot be discharged directly. They need further treatment. In order to reduce processing costs, molasses fermentation waste liquid is often recycled to make organic fertilizer. Patent CN2023111910828 uses molasses fermentation waste liquid to prepare organic fertilizer, which can not only improve soil quality, but also increase the yield of some crops such as corn and peppers.

[0005] However, there is currently no use of molasses fermentation wastewater to prepare organic fertilizer for rice. Summary of the Invention

[0006] In order to solve the above problems, the present invention provides a method for preparing paddy field organic fertilizer, comprising the step of preparing the organic fertilizer by utilizing molasses fermentation liquid.

[0007] In a specific embodiment, the method comprises the following steps:

[0008] S1: adding straw and rice bran meal to molasses fermentation liquid and mixing well to obtain fermentation raw material;

[0009] S2: performing primary fermentation on the fermentation product to obtain a primary fermentation product;

[0010] S3: adding bentonite to the primary fermentation product and performing secondary fermentation to obtain a secondary fermentation product;

[0011] S4: Concentrating the secondary fermentation product to make the moisture content 15-20%, i.e., the organic fertilizer.

[0012] In a specific embodiment, the weight ratio of the straw to the rice bran meal is 2:1, and the ratio of the total weight of the straw and the rice bran meal to the volume of the molasses fermentation liquid is 1:4.

[0013] In a specific embodiment, the pH value of the fermentation feedstock is 5-5.5.

[0014] In a specific embodiment, in S2, the fermentation raw material is inoculated with Cellulomonas dinitrogena and Bacillus subtilis, and fermented at 30-40° C. for 5 days to obtain the primary fermentation product.

[0015] In one embodiment, in S2, the inoculation concentration of Bacillus subtilis and Bacillus dinitrogenus is 1×10 5 cells / g fermentation raw material.

[0016] In a specific embodiment, in S3, the weight ratio of the bentonite to the straw is 1:1.

[0017] In a specific embodiment, in S3, bentonite is added to the primary fermentation product, and Trichoderma aculeatus, Bacillus velezensis and Rhizobium radiobacterium are inoculated, and fermented at 30-40° C. for 8 days to obtain the secondary fermentation product.

[0018] In one embodiment, the inoculation concentration of Trichoderma aculeatus, Bacillus velezensis and Rhizobium radiobacterium is 1×10 7 cells / g fermentation raw material.

[0019] The invention also provides a paddy field organic fertilizer prepared by the method.

[0020] The present invention utilizes molasses fermentation liquid to prepare an organic fertilizer specifically for use in rice fields. This organic fertilizer can enhance the lodging resistance of rice and increase the yield per rice plant, thereby significantly increasing the per-acre yield of rice. The present invention not only achieves the recycling and utilization of pollutants, but also generates substantial economic benefits. DETAILED DESCRIPTION

[0021] In order to make the objectives, technical solutions, and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

[0022] 1. Preparation method of rice field organic fertilizer

[0023] Prepare the fertilizer embodiment by the following method:

[0024] S1: Rice straw was crushed and then mixed with rice bran meal at a weight ratio of 2:1, and molasses fermentation liquid was added and mixed to obtain a fermentation raw material with a solid-liquid weight-to-volume ratio of 1:4. 10 mM citrate buffer was added to adjust the pH to 5-5.5;

[0025] S2: 1×10 of each bacteria were added to the fermentation raw materials. 5 Cellulomonas dinitrogena and Bacillus subtilis were inoculated at a concentration of 10 cells / g of fermentation raw material, and fermented at 30-40° C. for 5 days to obtain a primary fermentation product;

[0026] S3: Bentonite was added to the primary fermentation product at a rate of 1×10 7 Trichoderma aculeatus, Bacillus velezensis, and Rhizobium radiobacterium were inoculated at a concentration of 10 cells / g of fermentation raw material, and fermented at 30-40°C for 8 days to obtain a secondary fermentation product, wherein the weight ratio of bentonite to rice straw was 1:1;

[0027] S4: Evaporating and concentrating the secondary fermentation product to obtain an organic fertilizer with a water content of 15-20%.

[0028] 2. Comparative Example

[0029] The comparative organic fertilizer was prepared by referring to the method in patent CN2023111910828 and adding bentonite:

[0030] S1: Rice straw and melon peel were mixed in a weight ratio of 8:1, crushed, and passed through an 80-mesh sieve. The mixture was then added to molasses fermentation liquid to obtain a fermentation raw material. The weight ratio of corn straw to molasses fermentation liquid was 1:2.5. The mixture was fermented at 30-37°C for 1 day.

[0031] S2: Bentonite was added to the fermentation raw materials at a rate of 1×10 6 Bacillus megaterium, Pseudomonas stutzeri and Rhizobium radiobacterium were inoculated at a concentration of 100 cells / g fermentation raw material, and fermented at 40-45° C. for 10 days to obtain a fermentation product, wherein the weight ratio of bentonite to rice straw was 1:1;

[0032] S3: The fermentation product is concentrated by evaporation under reduced pressure to obtain an organic fertilizer with a water content of 15-20%.

[0033] 3. Effects of organic fertilizer on rice yield and lodging resistance

[0034] We selected a test plot with moderate and uniform fertility and divided it into nine small plots of equal size. Each plot was arranged in randomized blocks, with three experimental groups and three replicates per group. The plots were approximately 0.5 mu (approximately 0.5 mu) in size, with a plant spacing of 16.65 cm x 26.64 cm, and one seedling per clump. Plastic film was used to prevent fertilizer and water runoff, and drainage ditches and protective rows were provided around the plots. Normal field management was maintained.

[0035] Each plot was planted with rice using the direct seeding method. In addition to normal field management, the example experimental group also tilled the planting land with 10 kg / mu of the organic fertilizer example of the present invention before sowing; in addition to normal field management, the comparative example experimental group also tilled the planting land with 10 kg / mu of the organic fertilizer comparison example before sowing; and the control experimental group underwent normal field management.

[0036] This experiment was conducted twice, with plantings in April 2023 and April 2024. During planting, internode bending strength (including the bending strength of the second internode (I2) and the third internode (I3) at the base) was measured, and lodging rate was calculated. Yield per mu was calculated after harvest. The results are shown in Tables 1 and 2.

[0037] Table 1 Rice lodging resistance

[0038]

[0039] Table 2 Rice production

[0040]

[0041]

[0042] The above test results show that although the organic fertilizer of the comparative example can increase the number of grains per rice plant and the seed setting rate, it leads to a significant decrease in the resistance of rice stalks to lodging, even significantly lower than that of the control group. However, the organic fertilizer of the embodiment of the present invention can not only significantly improve the resistance of rice stalks to lodging, but also increase the number of grains per rice plant and the seed setting rate, thereby significantly increasing rice yield.

Claims

1. A method for preparing organic fertilizer for paddy fields, characterized in that: The method comprises the step of utilizing molasses fermentation liquid to prepare the organic fertilizer.

2. The method according to claim 1, characterized in that The following steps are involved: S1: adding straw and rice bran meal to molasses fermentation liquid and mixing well to obtain fermentation raw material; S2: performing primary fermentation on the fermentation product to obtain a primary fermentation product; S3: adding bentonite to the primary fermentation product and performing secondary fermentation to obtain a secondary fermentation product; S4: Concentrating the secondary fermentation product to make the moisture content 15-20%, i.e. the organic fertilizer.

3. The method according to claim 1, characterized in that In S1, the weight ratio of the straw to the rice bran meal is 2:1, and the ratio of the total weight of the straw and the rice bran meal to the volume of the molasses fermentation liquid is 1:

4.

4. The method according to claim 3, characterized in that In S1, the pH value of the fermentation raw material is 5-5.

5.

5. The method according to claim 3, characterized in that In S2, the fermentation raw material is inoculated with Cellulomonas dinitrogena and Bacillus subtilis, and fermented at 30-40° C. for 5 days to obtain the primary fermentation product.

6. The method according to claim 5, characterized in that In S2, the inoculation concentration of the dinitrogenous cellulospora and Bacillus subtilis was 1×10 5 cells / g fermentation raw material.

7. The method according to claim 6, characterized in that In S3, the weight ratio of the bentonite to the straw is 1:

1.

8. The method according to claim 6, characterized in that In S3, bentonite is added to the primary fermentation product, and Trichoderma aculeatus, Bacillus velezensis and Rhizobium radiobacterium are inoculated, and fermented at 30-40° C. for 8 days to obtain the secondary fermentation product.

9. The method according to claim 9, characterized in that The inoculation concentration of the Trichoderma aculeatus, Bacillus velezensis and Rhizobium radiobacterium was 1×10 7 cells / g fermentation raw material.

10. A rice field organic fertilizer, characterized in that: It is prepared by the method according to any one of claims 1 to 9.

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