WANG Xiao1,2,ZHANG Zhen1,ZHU Jiang1,2,SONG He3,DONG Zhaorong3
（1. Department of Resource and Environment, Anhui Agriculture University, Hefei 230036, China;
2. Key Laboratory of Farmland Ecosystem Conservation and Pollution Prevention and Control, Hefei 230036, China；
3. Department of Agriculture, Anhui Agriculture University, Hefei 230036,China; ）
Abstract: The distribution characteristics have been studied through contents measurement of different forms of selenium in selenium-rich soil in Qingyang County and rice grow in soil; the content and distribution characteristics of selenium in rice were studied, and the correlation between different forms of selenium in soil and selenium in rice was studied. The results show: the contents of different forms of selenium in selenium-rich soil in Qingyang County vary notably. Selenium of humic acid state, strong organic binding state and residual state have a higher relative content: all higher than 10%, while selenium of water-soluble state, ion state, iron manganese state and carbonate state have a lower relative content which are all lower than 5%. In the study area，the average content of selenium in rice is 0.0638 mg/kg, which is higher than the national average level of 0.032 mg/kg, and have reached the national standard of selenium-rich rice. Selenium enrichment and utilization of rice highly dependent on the states of selenium: selenium contents of water-soluble state and humic acid state in soil show strong relevance to the selenium content in rice, while selenium contents of other states show no distinctive relevance to the selenium content of rice. Thus, selenium enrichment and utilization of rice as well as the selenium content in rice could be promoted by apply organic biomass which could increase the content of humic acid state selenium.
Key words: Qingyang County; selenium-rich soil; selenium state; rice; relevancy.
EARTH AND ENVIRONMENT Vol.47, No.3, Tot No.329, 2019, Page 336-344
