Compound nitrogen-fixing microorganism bacterium fertilizer and preparation method thereof

Abstract

The invention discloses a compound nitrogen-fixing microorganism bacterium fertilizer and a preparation method thereof, particularly a compound nitrogen-fixing microorganism bacterium fertilizer which is wide in PH application range, strong in nitrogen fixing capacity under aerobic and anaerobic conditions, and easy to store. The compound nitrogen-fixing microorganism bacterium fertilizer is prepared from the following raw materials: 10 to 30 parts of bacillus flexus fermenting liquid, 30 to 80 parts of clostridium pasteurianum fermenting liquid and 20 to 60 parts of India Beijerinckia fermenting liquid. According to the compound nitrogen-fixing microorganism bacterium fertilizer and the preparation method thereof, the aerobic and anaerobic nitrogen fixing bacteria series are fused into a whole creatively; one type is the aerobic nitrogen fixing bacteria, namely, the India Beijerinckia (the India Beijerinckia can fix nitrogen under low oxygen, but is mainly the aerobic bacterium) and the bacillus flexus; the other type is the anaerobic nitrogen fixing bacteria, namely, the clostridium barati; both the aerobic nitrogen fixing bacteria and the anaerobic nitrogen fixing bacteria have strong nitrogen fixing capacity, can fix the nitrogen in relatively deep soil (10 to 30 cm), and can convert nitrogen in air into the nitrogen which can be absorbed by a plant and provide the nitrogen to the plant continuously.

Description

technical field [0001] The invention belongs to the technical field of biological fertilizers, and relates to a compound nitrogen-fixing microbial bacterial fertilizer and a preparation method thereof. Background technique [0002] Nitrogen-fixing bacteria fertilizers refer to microbial strains that live in soil or crop rhizosphere and fix nitrogen in the air. They are living products made by submerged liquid fermentation. They can fix nitrogen in the air as nutrients and secrete auxin Substances help crops grow. In nature, about 100 million tons of nitrogen are fixed by microorganisms every year, which plays a great role in increasing soil fertility. The research results show that the application of nitrogen-fixing bacteria fertilizer can promote the growth of plants, accompanied by a certain effect of increasing production, but the effect is unstable. The main reason is that the number of viable bacteria of nitrogen-fixing bacteria decreases during storage and transportati...

AI Technical Summary

Problems solved by technology

The research results show that the application of nitrogen-fixing bacteria fertilizer can promote the growth of plants, accompanied by a certain effect of increasing production, but the effect is unstable. The main reason is that the number of viable bacteria of nitrogen-fixing bacteria decreases during storage and transportation. Affected by the soil environment, the number and activity of viable bacteria will also decrease, and the effect cannot be guaranteed;

[0003] At present, the nitrogen-fixing bacteria that are mainly used are brown nitrogen-fixing bacteria, brown nitrogen-fixing bacteria, photosynthetic bacteria and other non-spore nitrogen-fixing bacteria, which are not easy to preserve and commercialize

Moreover, these bacteria generally grow poorly in acidic environments.

Moreover, most of them are single species, and their ability to adapt to the environment is limited