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近年来,我国一些单位为研制污水灌溉水质标准,对灌溉水中汞的浓度和土壤总汞含量与水稻吸收关系等进行了研究。试验证明水稻具有较高的吸收积累汞的能力。糙米中汞的含量和灌溉水中汞的浓度、土壤中总汞含量呈正相关。但是在这些研究中,向土壤或灌溉水中投加的均为 Hgcl_2。二十多年来,国外对水体中无机汞向有机汞(烷基汞)转化和通过水生生物食物链的富集过程进行了大量研究工作,对土壤——农作物系统中汞的迁移、积累也有不少报导,但后一方面的研究工作多限于与施用含汞农药有关的问题。而对于污
In recent years, some units in our country have carried out researches for the development of wastewater irrigation water quality standards, the mercury concentration in irrigation water, the total mercury content in soil and the rice absorption. Experiments show that rice has a high ability to absorb mercury accumulation. The content of mercury in brown rice is positively correlated with the concentration of mercury in irrigation water and the total mercury in soil. However, in these studies, Hgcl_2 was added to soil or irrigation water. For more than two decades, there has been extensive research into the conversion of inorganic mercury to organic mercury (alkyl mercury) in water bodies and enrichment processes through the food chain of aquatic organisms, and there has also been a lack of accumulation of mercury in soil-crop systems Fewer reports, but the latter part of the research work is mostly limited to issues related to the application of mercury-containing pesticides. And for the dirt