浙江富硒土壤中硒赋存形态特征

依据李家熙的土壤硒含量的分类定义标准,可以确认浙江存在富硒土壤.一些地区的红壤和水稻土是浙江重要的富硒土壤.富硒红壤和富硒水稻土中的有机结合态硒是土壤中的主要结合态.前者弱有机态硒含量高于强有机态的,且离子交换态硒含量低于碳酸盐态的,后者则反之.二者的离子交换态、碳酸盐态和铁锰氧化态硒含量加和对全硒的影响很小.

THE MODES OF OCCURRENCE OF SELENIUM IN SELENIUM-RICH SOIL OF ZHEJIANG PROVINCE

According to the classification definition standard of soil selenium amount put forward by Li Jiaxi, it is confirmed that there exists selenium-rich soil in Zhejiang. Red earth in some areas and rice soil are important forms of selenium-rich soil in Zhejiang. The organic combination state in selenium-rich red earth and that in rice soil are the main combination patterns. The amount of weakly organic selenium is higher than that of strongly organic selenium in selenium-rich red earth, and the amount of ion exchange state selenium is lower than that of carbonate, but things are opposite in the latter case. The total amount of ion exchange state, carbonate state and ferric-manganese oxidation state has very little effects on full selenium.