Biological liquid organic fertilizer and preparation method thereof

Abstract

The invention discloses a biological liquid organic fertilizer and a preparation method thereof, belonging to the field of microbial fermentation. According to the preparation method, biogas slurry and biogas residue generated by a biogas digester are taken as a culture medium, lactic acid bacteria, bacillus and yeast are taken as beneficial microflora, the culture medium is used for culturing the beneficial microflora, and the biogas slurry, the biogas residue and the beneficial microflora are fermented for 72-96 hours in an industrial fermentation tank, wherein the fermentation temperature is at 60-70 DEG C. After the biogas slurry is prepared into the concentrated liquid high-efficient biological organic fertilizer, the concentrated liquid high-efficient biological organic fertilizer can be transported in a larger region, can be convenient to use and has the advantages of upgraded effect and reduced cost and the pollution hidden trouble caused by direct use of the biogas slurry is eliminated. The biological liquid organic fertilizer prepared by the method can reduce the alkalinity of soil, avoid the generation of white nitrate on the surface of land, loosen and soften soil so that the soil has good air permeability; moreover through application of the biological liquid organic fertilizer, crops can grow uniformly and vigorously the yield increasing effect is very obvious.

Description

technical field [0001] The invention belongs to the field of microbial fermentation, in particular to a biological liquid organic fertilizer and a preparation method thereof. Background technique [0002] Since the reform and opening up, China has continued to grow rapidly for 33 years. With the acceleration of urbanization and the rapid development of the heavy chemical industry, the pressure on resources and the environment has increased. Industrial and urban development has reduced the area of ​​arable land, changing the use of fertilizers and pesticides. In order to support the increasing pressure on food safety and non-point source pollution caused by chemical agriculture, it is an important task for China to achieve stable growth in the output and quality of agricultural products on the basis of a decline in the use of chemical fertilizers and pesticides, and to improve food safety. major issues. [0003] At present, biogas slurry is used directly as fertilizer in the...

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Problems solved by technology

[0003] At present, biogas slurry is used directly as fertilizer in the planting industry in most areas. Although it has certain effects, it cannot be transported over long distances due to the limitation of transportation costs, and it is inconvenient to use. Moreover, long-term excessive use in some areas will cause compaction damage to the soil. , and will pollute groundwater. In some areas, biogas slurry pollution has become a big environmental problem, especially in greenhouses where long-term direct use of biogas slurry will cause microbial pollution, destroy the ecology in the greenhouse, and damage the food grown in the greenhouse. potential threat to security

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