Microorganism microbial agent for promoting growth of rice and reducing cadmium and preparation method and use method of microorganism microbial agent

Abstract

The invention discloses a microorganism microbial agent for promoting growth of rice and reducing cadmium and a preparation method and use method of the microorganism microbial agent, and belongs to the technical field of government of heavy metal pollution with microorganisms. The microorganism microbial agent provided by the invention comprises listeria grayi, burkholderia sp., pseudomonas stutzeri, bacillus subtilis and micromonospora echinospora, and is prepared through the steps of performing strain activation, performing enlarged culture, performing fermentation culture and performing mixing. At the growth resuming period during growth of the rice, the microorganism microbial agent is added to rice water culture potting nutrient fluid in the volume ratio of 1 to 400, and culturing isperformed until the highest tillering stage is achieved. Under the condition of the percentage by quantity of the components of the microorganism microbial agent that the listeria grayi is 50%, the burkholderia sp. is 20%, the pseudomonas stutzeri is 10%, the micromonospora echinospora is 10% and the bacillus subtilis is 20%, the absorptivity of the heavy metal cadmium by the rice is the lowest,and the potential of promoting growth of the rice is achieved. The microorganism microbial agent prepared by the preparation method disclosed by the invention has positive influence on promoting growth of the rice and reducing the absorption of the cadmium by the rice, and has good application prospects.

Description

technical field [0001] The invention belongs to the technical field of microbial treatment of heavy metal pollution, and in particular relates to a microbial bacterial agent for promoting rice growth and reducing cadmium, as well as a preparation method and an application method thereof. Background technique [0002] Rice is the main food crop in my country, and it is also a crop with a very high cadmium enrichment index. According to incomplete statistics, the area of ​​farmland polluted by cadmium in my country has exceeded 200,000 hectares, and the annual production of agricultural products with excessive cadmium content reaches 1.46 billion kilograms. Due to heavy metal pollution, grain production is reduced by more than 10 million tons every year, and more than 1,200 contaminated grains are polluted. 10,000 tons, and the economic loss amounted to more than 20 billion yuan. Cadmium is very mobile, and it is easy to accumulate in plants through the absorption of plant roo...

AI Technical Summary

Problems solved by technology

[0003] Traditional soil heavy metal remediation methods are limited due to shortcomings such as long cycle, limited remediation depth, and unsuitability for large-scale treatment. There is an urgent need for a low-cost, green and efficient technology to solve rice production safety problems.

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