Soil heavy metal biological fixing agent and application method thereof

Abstract

The invention relates to the technical field of soil conditioners and particularly relates to a soil heavy metal biological fixing agent and an application method thereof. The formula of the soil heavy metal biological fixing agent is that every one kilogram of an organic fertilizer is added with 2-10 g (109 CFU/g) of B. natto solid leavening agent, 2-10 g (109 CFU/g) of B.mucilaginosus solid leavening agent, 2-6 g (109 CFU/g) of B.megaterium solid leavening agent and 4-10 g (1010 CFU/g) of Trichoderma koningii solid leavening agent, wherein the main ingredients of the biological organic fertilizer contain more than 40% of organic matter, more than 20 million/g of effective viable count, and more than 5% of total nutrient. The soil heavy metal biological fixing agent is low in cost, has few environmental risks, remarkably reduces the absorption of the heavy metals of the crops, improves the soil fertility, effectively prevents and cures the soil-borne diseases and increases the economic benefit of the crops.

Description

technical field [0001] The invention relates to the technical field of soil conditioners, in particular to a soil heavy metal biological fixative and an application method thereof. Background technique [0002] The current physical and chemical heavy metal remediation methods have high technical requirements or high economic costs, and will also damage the soil microbial flora. However, some existing bioremediation methods need to stop farming during the repair process, or only have a single function of heavy metal repair but not other functions. [0003] The heavy metals entering the soil cannot be degraded by microorganisms, and can accumulate in the soil, be enriched by organisms, and finally enter the human body through the food chain, endangering human health. However, the research results show that the total amount of heavy metals in the soil cannot well reflect the tendency of heavy metals to accumulate in crops, and only some forms of heavy metals are bioavailable. ...

AI Technical Summary

Problems solved by technology

However, the Nuovo fertilizer used in this comparison document is relatively alkaline. In order to ensure the reproduction of microbial strains, a certain amount of humic acid must be added to adjust the pH. Adding humic acid will lead to an increase in production costs.

In addition, after using Nuovo fertilizer, the fertility of farmland increases, and the growth and reproduction of pathogenic bacteria are faster, which is easy to cause soil-borne diseases