Method for reducing total mercury content in rice

Abstract

The invention discloses a method for reducing total mercury content in rice. The method includes the following steps of preparing a unique strain P11 culture solution, treating rice with P11, applying a compound fertilizer in a tillering stage and a heading stage respectively, performing daily management and the like. By adopting the method for reducing the total mercury content in the rice to plant the rice, the total mercury content in the rice can be obviously reduced; the rice planting production process is relatively simple, only one leaf surface spraying process is added compared with a conventional rice planting method, spraying operation is easy, the workload is small, and the labor cost and the economic cost are low; a used strain comes from a soil environment, the raw materials of a culture medium are simple and easy to obtain, and the culture solution is simple in preparation process, low in energy consumption and low in cost; and the sprayed culture solution is high in environmental safety and small in environmental harm, hardly causes secondary pollution, hardly changes a soil matrix and hardly affects a soil structure.

Description

technical field [0001] The invention relates to the technical field of crop safety production, in particular to a method for reducing total mercury in rice. Background technique [0002] With the development of my country's industrialization, the problem of environmental pollution is becoming more and more serious. In 2014, the Ministry of Environmental Protection and the Ministry of Land and Resources jointly released a survey on the status of soil pollution in the country, pointing out that the total exceeding rate of all pollutants was 16.1%, among which the top The third inorganic pollutants are Cd, Hg, and As in sequence. Among them, mercury damages the central nervous system and has adverse effects on the mouth, mucous membranes and teeth. Mercury can accumulate in the body and is easily absorbed by the skin, respiratory tract and digestive tract. Prolonged exposure to high mercury environments can lead to brain damage and death. [0003] Since mercury has long-range t...

AI Technical Summary

Problems solved by technology

The inventive method can effectively reduce the absorption of inorganic mercury and methylmercury by rice, but the disadvantage of this method is that the preparation of sodium selenite modified biochar is relatively complicated, the cost is high, and it is not environmentally friendly, and sodium selenite is highly toxic , which may harm the soil ecosystem

This method can reduce the absorption of mercury by crops, but the disadvantage of this method is that the effect of non-fine treatment in the field is not clear, and this soil conditioner needs to be added every time rice is planted, and long-term addition of mineral materials will change the soil structure. risks of

Chinese patent CN 108178709 A discloses a preparation method and application method of a rice mercury absorption inhibitor, wherein the rice mercury absorption inhibitor includes prepared biochar, and the application method is mainly to combine rice mercury absorption inhibitor with nitrogen fertilizer, The basal fertilizer composed of phosphate and potassium fertilizers is buried in the plow layer of mercury-contaminated soil and then rice is planted. This method can reduce the enrichment of inorganic mercury in rice and inhibit the absorption of methylmercury by rice. However, the disadvantage of this method is that biochar The preparation of high energy consumption

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