%0 Journal Article
%T Effect of the number of years of vegetable cultivation on soil phosphorus sorption-desorption characteristics<br>蔬菜种植年限对土壤磷素吸附解吸特性的影响
%A GAO Xiu-Mei
%A WANG Ji-Dong
%A ZHANG Yong-Chun
%A ZHAO Geng-Mao
%A LIU Zhao-Pu
%A XU Xian-Ju
%A NING Yun-Wang
%A HU Yong-Hong
%A <br>高秀美
%A 汪吉东
%A 张永春
%A 赵耕毛
%A 刘兆普
%A 许仙菊
%A 宁运旺
%A 胡永红
%J 中国生态农业学报
%D 2010
%I 
%X An experiment involving 3~5, 15~20 and 25~30 years continuous vegetable cultivation was carried out to determine fixation and release mechanisms of soil phosphorus in cultivated yellow brown soils. Based on the results, phosphorus isothermal adsorption and adsorption-desorption curves are respectively described by Langmuir equation and quadratic equation. With increasing years of cultivation, the maximum phosphorus adsorption (Qm) and maximum buffer capacity (MBC) of surface soil decrease significantly. However, degree of phosphorus saturation (DPS) and phosphorus desorption rate increase. Phosphorus desorption rates in 15~20- and 25~30-year cultivated vegetable soils are significantly higher than that in the 3~5-year cultivated vegetable soils. Correlation analysis for the main factors affecting soil phosphorous adsorption-desorption (e.g., MBC, DPS, etc.) reveals that soil amorphous Fe-Al content significantly affects soil phosphorus adsorption-desorption.
%K Soil phosphorus
%K Adsorption
%K Desorption
%K Degree of phosphorus saturation
%K Desorption rate<br>土壤磷
%K 吸附
%K 解吸
%K 磷吸附饱和度
%K 解吸率
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=03F54A49DE00578AA0E5DDF5BC021AA7&cid=1A8B5357F0EF07B8&jid=AB3ABF502E2E1FF39F0E3B80164C9031&aid=74EA9B4932B22A04035E00F6FEFDC5A2&yid=140ECF96957D60B2&vid=13553B2D12F347E8&iid=E158A972A605785F&sid=C19D5524C51D7FE4&eid=2868AE484E7BAD6B&journal_id=1671-3990&journal_name=中国生态农业学报&referenced_num=0&reference_num=29