On Selenium Distribution in Soil and Factors Influencing Such Distribution in Yiyang Agricultural Industrial Zone of Hunan Province
In order to promote the growth and development of traditional agricultural industry in Yiyang City,where abundant selenium is found in soils,it is necessary to rationally develop and utilize high-quality land resources,scientifically delimitate zone specific agricultural industrial zones for crop cultivation,and create a brand of selenium-rich agricultural products.18 agricultural industrial zones in the city have been selected for a detailed investigation on 1 ∶2 000 selenium-rich soils,and 1 916 topsoil samples have been analyzed for selenium and effective selenium.Results show an average value of selenium of 0.54 mg/kg and a median value of 0.44 mg/kg in the topsoil of 18 working areas and a coefficient of variation of 169.51%,which concludes that selenium is unevenly distributed in soils of the area.The various geological backgrounds significantly affect the content of selenium in soils,and the selenium content of Quaternary and Cambrian soils is higher among the soil-forming rocks.
agricultural geologyseleniumagricultural geochemistry methodsagricultural industrial zone
NETL
NSTL
万方数据
维普
