THE TRANSPORT AND TRANSFORMATION OF SELENIUM IN THE SOIL-PADDY PLANT SYSTEM AFFECTED BY GEOLOGICAL FACTORS
Li Yi-gen1, DONG Yan-xiang2, ZHENG Jie2, XIE Huai-sheng2, SONG Ming-yi2
1. Shenfeng Institute of Novel Geological Techniques CO., LTD., Shanghai 201107, China;
2. Zhejiang Institute of Geological Survey, Hangzhou 311203, China
The root system selenium has relationship not only with the amount of selenium, but also with the acidity and alkalinity of soil. The amount of selenium in surface paddy is lower than that in the root system.The amount of selenium in leaves is lower than that in root but higher than in trunk, with the fringe part having the lowest selenium.42%~50% of selenium in the plant at surface earth is in the fringe, and only 2.31%~4.31% of selenium is in the plant. Moreover, the amount of selenium in unpolished rice is lower than that in paddy but higher than that in rice. There is a direct proportion between the amount of selenium in paddy and the acidity and alkalinity of soil, which means the stronger the alkali in soil is, the higher the amount of selenium in paddy becomes. The amount of selenium in the body of paddy has something to do with that in the paddy soil, which means that there exists a direct proportion between the amount of selenium in soil and that in paddy.
郦逸根, 董岩翔, 郑洁, 解怀生, 宋明义. 地质因素影响下的硒在土壤—水稻系统中的迁移转化[J]. 物探与化探, 2007, 31(1): 77-80.
Li Yi-gen, DONG Yan-xiang, ZHENG Jie, XIE Huai-sheng, SONG Ming-yi. THE TRANSPORT AND TRANSFORMATION OF SELENIUM IN THE SOIL-PADDY PLANT SYSTEM AFFECTED BY GEOLOGICAL FACTORS. Geophysical and Geochemical Exploration, 2007, 31(1): 77-80.
[1] 李书鼎.污染生态物理化学[M].北京:中国环境科学出版社,2002.
[2] 李家熙,张光第,葛晓云,等.人体硒缺乏与过剩的地球化学环境特征及其预测[M].北京:地质出版社,2000.
[3] 刘英俊,曹励明,李兆麟,等.元素地球化学[M].北京:科学出版社,1984.
[4] Mao J D,Xie B S.Fractionation and distribution of Selenium in Soils[J].Commun Soil Sci. Plant Anal.,1999,30(17&18):2437.
[5] Sharmasarkar S,Vance G F.Fractional portioning for assessing solid-phase speciation and geochemical transformations of soil selenium[J].Soil Sci. ,1995,160(1):43.
[6] 张艳玲,潘根兴,李正文,等.土壤-植物系统中硒的迁移转化及低硒地区食物链中硒的调节[J].土壤与环境,2002,11(4):388.