%0 Journal Article
%T ORGANIC SELENIUM AND ITS DISTRIBUTION IN SOILS<br>中国几种土壤中的有机态硒及其分布特征
%A He Zhenli
%A Yang Xiaoe
%A Zhu Jun
%A Xia Weiping
%A Pan Jianming
%A Liu Xiaoya
%A <br>何振立
%A 杨肖娥
%A 祝军
%A 夏卫平
%A 潘健明
%A 刘小涯
%J 环境科学学报
%D 1993
%I 
%X Organic selenium and its distribution in soils of typical groups in China were studied using 0.1 mol L-1NaOH+0.1 mol L-1Na4P2O7 extraction techniques. Organic selenium accounts for 3.46 %-59.86%, on average, 28.6% of the total Se for 16 soils tested. Factors affecting organic Se content in soils include total Se content, organic carbon, exchangeable acidity, and pH. The C/S eratio of organic matter extracted by the NaOH-Na4P2O7 mixture ranges from 0.58 × 106 to 42.93×106, on average, 6.38×106. Soils from low Se areas where Kashan and Kaschin-Beck disease once happened, have much higher C/Se ratio than those from areas without Se deficiency. Of the organic selenium, 66% (the average) was associated with fulvic acid (FA-Se) and 34% with humic acid fraction (HA-Se). The percentage of HA-Se is, in general, higher in Se deficient soil than in normal soil.
%K soils
%K organic selenium
%K distribution
%K availability<br>土壤
%K 有效性
%K 硒
%K 分布特征
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=3FF3ABA7486768130C3FF830376F43B398E0C97F0FF2DD53&cid=A7CA601309F5FED03C078BCE383971DC&jid=03A55E61A8750ACAC6AF81EF9E2AC838&aid=A9F2EC1A9453CB5FF9B4F7669FCA1597&yid=D418FDC97F7C2EBA&vid=FC0714F8D2EB605D&iid=38B194292C032A66&sid=C1B34927D429E92F&eid=EBD6B792C9111B87&journal_id=0253-2468&journal_name=环境科学学报&referenced_num=15&reference_num=12