Method for repairing nitrate polluted soil by biotransformation bacteria N4

Abstract

The invention discloses a method for repairing nitrate polluted soil by biotransformation bacteria N4. The method is an in-situ repair method, feeds N4 fungicide in nitrate polluted farmland soil, river bottom mud and fruit garden soil, and feeds the N4 fungicide again 30 days later. A N4 bacteria separation, purification and enlarge cultivation method is published in [Yang Zongzheng, Wang xin and the like; separation of heterotrophic nitrification bacteria and reinforced activated sludge denitrification effect thereof [J]; Chinese water supply and drainage, 2006, 22 (21): 67-70]; the N4 bacteria belongs to the Gram-negative bacteria, is the heterotrophic nitrification bacteria, and is cultivated by dry potato starch waste liquid; biological conversion liquid is used for biologically repairing the polluted soil to achieve the purpose of treating the pollution by wastes; and the method achieves excellent environmental benefit, social benefit and economic benefit.

Description

technical field [0001] The invention belongs to the field of agricultural biotechnology, and in particular relates to a method for repairing nitrate-contaminated soil by using biotransformation strain N4. Background technique [0002] According to reports, 81.2% of the nitrate ingested by the human body comes from vegetables. Therefore, the research on the technology of reducing the accumulation of nitrate in vegetables has become a hot spot that people pay more and more attention to. Vegetables are a kind of crops that are easy to accumulate nitrates. Farmers use excessive nitrogen fertilizers in order to obtain high yields, resulting in the accumulation of nitrates and the decline of vegetable quality. Generally, when the nitrate content in the soil is high, the nitrate content in the vegetables is also high, and vice versa, but there is no one-to-one correspondence between the two. Therefore, controlling the accumulation of nitrate in the soil is an urgent problem. Biore...

AI Technical Summary

Problems solved by technology

Vegetables are a kind of crops that are easy to accumulate nitrates. Farmers use excessive nitrogen fertilizers in order to obtain high yields, resulting in the accumulation of nitrates and the decline of vegetable quality.

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