Phosphorus-solubilizing and cadmium-reducing microorganism bacterium agent and preparation method thereof

Abstract

The invention relates to the field of microorganism application and environment protection and in particular relates to a phosphorus-solubilizing and cadmium-reducing microorganism bacterium agent anda preparation method thereof. The invention provides the microorganism bacterium agent with phosphorus-solubilizing and cadmium-reducing effects and the preparation method thereof; the microorganismbacterium agent is prepared from the following components: 15 to 30 parts of a compound bacterium agent and 70 to 85 parts of a carrier, wherein the compound bacterium agent contains 0.25 to 1.5 billion cfu / g of bacillus methylotrophicus, 0.10 to 0.50 billion cfu / g of ralstonia eutropha and 0.05 to 0.40 billion cfu / g of paecilomyces lilacinus; the carrier is powder obtained by drying and sieving turf and diatomite, wherein the turf has the advantages of improving water retention, ventilation and fertilizer retention capabilities of soil; the diatomite has the advantages of strong adsorption performance, neutral pH (Potential of Hydrogen) and no toxin, good mixing uniformity and the like. The phosphorus-solubilizing and cadmium-reducing microorganism bacterium agent provided by the invention is powdery; when being applied in a land preparation process, the phosphorus-solubilizing and cadmium-reducing microorganism bacterium agent can be used for effectively improving the fertility of the soil and increasing the content of effective phosphorus capable of being absorbed by crops in the soil; meanwhile, the mobility of cadmium ions is reduced through the metabolic activity of microorganisms and the absorption of the crops on the cadmium ions is reduced.

Description

technical field [0001] The invention relates to a phosphorus-dissolving and cadmium-reducing microbial bacterial agent and a preparation method thereof, belonging to the field of microbial application and environmental protection. Background technique [0002] According to the "China Soil Environmental Protection Policy Research" by the China Council for International Cooperation on Environment and Development, more than 50% of the cultivated land in my country is deficient in trace elements, and 51% of the cultivated land is deficient in phosphorus. The long-term low input and high expenditure of nutrients have caused a decline in soil fertility nationwide. What is more serious is that according to the sampling monitoring of harmful heavy metals in the soil of 300,000 hectares of basic farmland protection areas by the Ministry of Environmental Protection, it was found that 36,000 hectares of soil heavy metals exceeded the standard. Up to 12.1% (Wang Jiao. Review and Prospect ...

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Problems solved by technology

[0004] Chinese patent CN 106187402A discloses a special fertilizer for reducing cadmium in soil and its preparation method. In addition to the carrier, the microorganisms are Aspergillus niger fungicide, and the functional strain is single

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