Use of compound microbial fertilizer in reducing content of heavy metals in rice grains

Abstract

The invention discloses use of a compound microbial fertilizer in reducing content of heavy metals in rice grains. A method for reducing the content of heavy metals in rice grains comprises the following steps: before transplanting rice seedlings, namely in the first ten days of June, applying 50-60 kg/mu of a 'Xinfengyuan brand' liquid ecological enzyme fertilizer as a base fertilizer; in the first ten days of July, applying 40-50 kg/mu of 'Xinfengyuan brand' liquid ecological enzyme fertilizer as a tillering fertilizer; after two weeks, applying 200-300 kg/mu of chicken manure in mid-to-late July as a second tillering fertilizer; and at the end of August, applying 15-20 kg/mu of the liquid ecological enzyme fertilizer as an earing fertilizer. The 'Xinfengyuan brand' liquid ecological enzyme fertilizer effectively reduces the content of heavy metals in brown rice, specifically remarkably reduces accumulation of heavy metals Pb, Co, Cr and V in the brown rice, particularly, regulates and controls Pb, and enables eating of rice grains to meet the national food safety standard.

Description

technical field [0001] The invention belongs to the field of biological fertilizers and relates to the application of compound microbial fertilizers in reducing heavy metal content in rice grains. Background technique [0002] Rice remains a staple food worldwide, fed by more than half of the world's population, feeding approximately 557 million people in Asia and billions globally. Rice plays a pivotal role in maintaining food security (Wu et al., 2021). China is one of the major rice producing countries in the world. The world's total rice output in 2019 was 714 million tons, of which China's total rice output was 199 million tons, accounting for 27.87%. Asia accounts for more than 70% of the world's rice production. However, since the beginning of the 21st century, the growth of rice production in Asia has gradually slowed down, and how to increase rice production to keep up with or even exceed the population growth rate has become an urgent problem. [0003] Rice grow...

AI Technical Summary

Problems solved by technology

The enrichment of heavy metals in the soil and heavy metal sewage irrigation can lead to an increase in the concentration of heavy metals in local grains, vegetables and other agricultural products, bringing great ecological environmental risks and food safety risks to the surrounding farmland soil and crops

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