Method for controlling soil and fixing nitrogen by using blue algae

Abstract

The invention relates to a method for controlling soil and fixing nitrogen by using blue algae, the method is characterized in that the blue algae are dried and crushed and then applied to the soil, the soil is loosened, and the use amount of fertilizers can be reduced.

Description

technical field [0001] The invention relates to a method for using cyanobacteria to control soil and fix nitrogen. Background technique [0002] cyanobacteria Also known as blue-green algae (blue-green algae), it is a class of long evolutionary history, negative Gram staining, no flagella, containing chlorophyll a, but does not contain chloroplasts (different from eukaryotic algae), capable of oxygen production Large photosynthetic unicellular prokaryotes. Some cyanobacteria cause eutrophic seawater "green tide" and lake "bloom" after being polluted by nitrogen, phosphorus and other elements, which bring serious harm to fishery and aquaculture. The usual treatment is to landfill or incinerate the blue-green algae after salvage. Because cyanobacteria contain toxins such as cyclic peptides and alkaloids, the way of landfilling may cause pollution to the water body; the method of burning will cause pollution to the atmosphere. [0003] At present, there are also methods of ...

AI Technical Summary

Problems solved by technology

Using the above methods will destroy the cell wall of cyanobacteria, causing the air sacs of cyanobacteria to rupture, thus losing the function of ascending and descending

Applied into the soil, it becomes a dead thing that cannot move. It can only provide organic matter for the soil in terms of conditioning the soil. It cannot loosen the soil through its own movement, and the effect of conditioning the soil is not good.

[0004] Nitrogen-fixing cyanobacteria contain nitrogenase, which can fix nitrogen. However, when the nitrogen-fixing cyanobacteria extract prepared by the above three methods is applied to soil, it can hardly achieve the effect of nitrogen fixation.

The reason is that the applicant believes that the extract prepared by the acid-base chemical method is extracted under acid-base conditions during extraction, and the extraction time is long, which may easily cause enzyme inactivation. Therefore, applying it to the soil cannot achieve nitrogen fixation. The use of microbial fermentation will cause damage to the enzyme, so the effect of nitrogen fixation cannot be achieved when applied to the soil; the use of enzyme extraction, due to the specificity of the enzyme, the selection of the enzyme becomes the key, and the selection of the enzyme is not appropriate. It is also easy to cause damage to nitrogenase, such as protease extraction, because the main component of nitrogenase is protein, so the use of protease extraction will damage the protein in nitrogenase, inactivate the enzyme, and it will not be achieved when applied to the soil. The effect of nitrogen fixation

[0005] At present, there is no product and method for applying nitrogen-fixing cyanobacteria into the soil, which can better loosen the soil, and can better play the role of nitrogenase and reduce the amount of fertilizer used.