%0 Journal Article
%T Forms and bio-availabilities of exogenous arsenic in purple soils<br>紫色土外源砷的形态分配与化学、生物有效性
%A MIAO Jinyan
%A HE Feng
%A WEI Shiqiang
%A LIU Gang
%A <br>苗金燕
%J 应用生态学报
%D 2005
%I 
%X This study showed that after As was added into purple soils for 10 days, 50.2%-61.1% of it transformed into residual As, occupying 68%-86% in original soils. For acid purple soil, the As forms were Al-As > Fe-As> Ca-As; for neutral purple soil, they were Ca-As > Al-As > Ca-As > Fe-As > A-As, and for calcic purple soil, they were Ca-As > Al-As > Fe-As >A-As. It is suggested that NH4Cl could be used as common extractant for different soils, because it slightly affected original As forms in soils, and showed a highly significant correlation (P = 0.01) to plant absorption. From pluralistic regressive analysis of plant As content and each As form, Al-As and Fe-As were the main available forms in acid purple soil, but A-As and Ca-As were the most important fractions in neutral and calcic purple soils. The study also showed that H3BO3 could restrain the F interference in the operation of As speciation separations.
%K Purple Soil
%K Arsenic
%K Form
%K Availability<br>紫色土
%K 砷
%K 形态
%K 有效性
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=90BA3D13E7F3BC869AC96FB3DA594E3FE34FBF7B8BC0E591&jid=42FEDDFE54F8BCD9D5FD1926ABDD7722&aid=41185E78543A26BC&yid=2DD7160C83D0ACED&vid=7801E6FC5AE9020C&iid=94C357A881DFC066&sid=7E7F5B01D43BD73F&eid=F52FA2254444BE97&journal_id=1001-9332&journal_name=应用生态学报&referenced_num=2&reference_num=24