Straw organic fertilizer and preparation method thereof

Abstract

The invention provides a straw organic fertilizer and a preparation method thereof. The method comprises the following steps: mixing rubbed and crushed straws with a composite microecological preparation, regulating and controlling the water activity and bulk density, then covering a stack formed by the straws with a semi-permeable membrane to form a relatively sealed environment with controllable maximum permeation amount of water vapor, and carrying out primary fermentation; and when the water activity of the compost is reduced to below 0.80, finishing the first fermentation, removing the semi-permeable membrane, crushing and screening a product obtained after the first fermentation, uniformly spraying a bacillus flexus microbial inoculum to a screen underflow, building a compost and covering a film for second fermentation, and when the water activity of the compost is reduced to below 0.75, finishing the second fermentation. According to the invention, a lasting and uniform high-temperature and high-humidity environment can be formed to completely kill germs, worm eggs, grass seeds and the like, so that the straw decomposition is accelerated, the discharge amount of nitrous oxide and ammonia gas in the composting process is effectively reduced, the content of nitrogen and potassium in the fertilizer is increased, and rapid harmless treatment and resource utilization of the straw are realized.

Description

technical field [0001] The invention relates to the technical field of ecological cycle agriculture, in particular to a straw organic fertilizer and a preparation method thereof. Background technique [0002] Straw is the general term for the stems and leaves (ears) of mature crops, usually wheat, rice, corn, potatoes, rapeseed, cotton, sugar cane and other crops (usually coarse grains) after harvesting the seeds. Since more than half of the photosynthetic products of crops exist in the straw, the straw is rich in organic matter, nitrogen, phosphorus, potassium and trace elements, and is a valuable renewable biomass resource. important source. The average annual output of straw is 1 billion tons, and the annual storage is as high as 900 million tons. Therefore, the rational development and utilization of straw resources is of great significance to promote the development of ecological cycle agriculture. [0003] Using straw as compost raw material to produce organic fertil...

AI Technical Summary

Problems solved by technology

However, the traditional straw composting technology has defects such as low fermentation temperature in the high temperature stage, serious nutrient loss, and odor diffusion, which lead to problems such as long decomposing process, incomplete sterilization of base material, and low content of active ingredients in the product, which in turn affects the organic quality of straw. fertilizer product quality

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