%0 Journal Article
%T Study on adsorption and desorption characteristics of soils and phosphorus requirement under oxidized and reduced conditions<br>氧化还原条件下红壤磷吸附与解吸特性及需磷量探讨
%A SHAO Xing-hu
%A ZHANG Jian-zhong
%A MAO Yong
%A WANG Zhong-min
%A <br>邵兴华
%A 张建忠
%A 毛 勇
%A 王中敏
%J 土壤
%D 2010
%I 
%X Phosphate requirement of paddy or upland were investigated by adsorption/desorption experiment under oxidized and reduced conditions in five red soils. Results showed that P adsorption capacity increased with the increase of added P concentration. Phosphate adsorption curves of soils fitted well with Langmuir equation. The range of the maximum capacities of P adsorption (Qm) ranged from 794.22 to 956.75 mg/kg under oxidized condition and from 867.31 to 1 195.62 mg/kg under reduced condition. The capacity of desorption P increased with the increase of the capacity of P adsorption, P desorption rate of soils was lower under reduced condition than that under oxidized condition. Phosphorus requirement was calculated from the Langumir equation on the basis of P concentration in soil solution at 0.2 mg/kg. Phosphorus requirement of soils increased after water logging.
%K Oxidized and reduced conditions
%K Adsorption and desorption
%K Phosphate requirement<br>氧化还原
%K 吸附解吸
%K 需磷量
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=03F54A49DE00578AA0E5DDF5BC021AA7&cid=1A8B5357F0EF07B8&jid=56F69E970C6E5190CDB409D28DD0E3C6&aid=30FA2F9FEE3DD70C53A1FA9EB68D826A&yid=140ECF96957D60B2&vid=ECE8E54D6034F642&iid=0B39A22176CE99FB&sid=334E2BB8B9A55ABB&eid=D2742EEE6F4DF8FE&journal_id=0253-9829&journal_name=土壤&referenced_num=1&reference_num=14