Microbial product capable of simultaneously controlling heavy metal contamination and pest damage and preparation method thereof

Abstract

The invention discloses a microbial product capable of simultaneously controlling heavy metal contamination and pest damage and a preparation method thereof. The microbial product comprises a nutritional medium and target strains, the nutritional medium is a powdery nutritional medium and is prepared from low-cost protein-type plant powder, low-cost energy-type plant powder and low-cost fiber-type plant powder, and the target strains particularly comprise brevibacillus laterosporus, bacillus subtilis, bacillus thuringiensis and bacillus licheniformis. The preparation method comprises the steps of nutritional medium preparing, target strain culturing, microbial product preparing and microbial product preserving. The microbial product capable of simultaneously controlling heavy metal contamination and pest damage and the preparation method thereof are especially suitable for dry and barren soil land contaminated by heavy metals, harm of heavy metal contamination can be reduced, the fertility of the dry soil land is improved, and normal planting of crops is not affected in the control period.

Description

technical field [0001] The invention relates to the fields of heavy metal prevention and control and pest control, in particular to a microbial product and a manufacturing method thereof for simultaneously controlling heavy metal pollution and pests. Background technique [0002] Insect pests often have adverse effects on agriculture, forestry, and animal husbandry. At present, the mode of controlling pests is mainly to spray pesticides to prevent pests. Spraying pesticides can eliminate most diseases and insect pests, but some diseases and insect pests are more tenacious and develop resistance. Pesticide research and development units are required to continuously develop new products to deal with pests and diseases, and pesticides themselves are likely to cause harmful effects on the human body and the environment, and may also easily lead to soil depletion and compaction. [0003] Heavy metal pollutants in dry soil have poor mobility in the soil, long residence time, can...

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Problems solved by technology

[0005] Among the relevant patents that have been applied in China, there is no relevant technical information on the microbial treatment of heavy metal-contaminated dry soil and insect pests at the same time

In a similar field, the patent "A Method for Microbial Remediation of Heavy Metal Contaminated Soil" (Application No.: 201110122739.6, Publication Date: 2011-11-16) discloses a method of soil treatment using Rhodobacter sphaericus preparations combined with flooding. The working principle is mainly to use Rhodobacter sphaericus to absorb heavy metals after multiplying in a large amount in a water-rich anaerobic environment, and then infiltrate into the ground through water to reduce the concentration of heavy metals in the soil. However, the soil cannot be used for planting operations during the treatment process, and the economic cost is high. On the other hand, the occurrence of insect pests cannot be prevented at the same time. For growers, land management is more complicated and the operability is low, and heavy metals flowing into groundwater will also cause secondary pollution; "(Application No.: 201410682558.2, Publication Date: 2015-04-22) discloses a heavy metal-contaminated soil treatment agent using Bacillus subtilis and Candida tropicalis as active ingredients. heavy metals, and can remain in the soil for a period of time, but Candida tropicalis is an anaerobic fungus, which cannot survive for a long time in dry and ventilated soil. The tolerance is poor, the enrichment effect is not good, and because each microorganism has its limitations, the effect of soil treatment is neither long-lasting nor comprehensive