Straw decomposed organic fertilizer and preparation method thereof

Abstract

The invention belongs to the technical field of organic fertilizers, and particularly relates to a straw decomposed organic fertilizer and a preparation method thereof. The straw decomposed organic fertilizer is prepared from the following components in parts by weight: 200-400 parts of crop straw, 50-80 parts of vegetable leaves, 20-40 parts of animal waste and 0.5-1.0 part of a composite microbial decomposition agent; wherein the composite microbial decomposition agent comprises pseudomonas stutzeri, penicillium oxalicum, rhizopus oryzae, trametes versicolor and white rot fungi. Crop straw, vegetable leaves and animal waste are mixed in proportion to serve as an organic material, the carbon-nitrogen ratio of a single straw organic matter can be reduced, and the situation of nitrogen deficiency after the fertilizer is applied to soil is avoided. By adding the composite microbial decomposition agent, the time required for decomposition can be greatly shortened, the reduction speed of the carbon-nitrogen ratio is increased, preservation of nitrogen, phosphorus and potassium in compost and increase of organic matters are facilitated, and nutrient balance is promoted. After the fertilizer is applied to soil, the content of organic matters and available nutrients in the soil can be increased, acidified soil is improved, and soil fertility is increased.

Description

technical field [0001] The invention belongs to the technical field of organic fertilizers, and particularly relates to a straw decomposed organic fertilizer and a preparation method thereof. Background technique [0002] Straw is a by-product of agricultural production. According to statistics, the annual straw resource in my country reaches 9.84×10 8 t. Traditional disposal or incineration methods will pose a huge threat to the agro-ecological environment. At present, the comprehensive utilization of straw mainly includes fertilizer, feed, base material, fuel, and raw materials. Among them, there are two main methods of fertilizer utilization: direct crushing and returning to the field and composting. [0003] The method of directly crushing and returning straws has the problem that the amount of straw returning to the field is too large, resulting in low seedling rate, low tiller number, competition with crops for nutrients, imbalance of soil carbon and nitrogen ratio, a...

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Problems solved by technology

[0003] The method of directly crushing and returning straw to the field has the problem that the amount of straw returning to the field is too large, resulting in low seedling rate, reduced tiller number, competition with crops for nutrients, imbalance of soil carbon and nitrogen ratio, and affecting the yield of next crops

In addition, the long-term direct return of straw to the field will aggravate some common diseases and insect pests. The occurrence of soil-borne and seed-borne diseases is increasing year by year, which directly affects agricultural production and increases the amount of pesticides.

[0004] Straw retting and returning to the field is another important mode of straw fertilizer utilization. However, due to the high carbon-nitrogen ratio of straw itself, the high content of refractory organic matter such as cellulose and lignin, and the low nutrient content, the composting and retting fermentation time is long, and It is greatly affected by temperature, and the output is also small, which is not conducive to large-scale promotion and application

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