文献类型： 外文期刊
作者： Sun, Qian 1 ; Li, Tiantian 3 ; Alva, A. K. 3 ; Li, Yuncong C. 3 ;
作者机构： 1.Jiangsu Acad Agr Sci, Inst Agr Facil & Equipment, Nanjing, Jiangsu, Peoples R China
2.Minist Agr, Key Lab Protected Agr Engn Middle & Lower Reaches, Nanjing, Jiangsu, Peoples R China
3.Univ Florida, IFAS, Ctr Trop Res & Educ, Dept Soil & Water Sci, Homestead, FL 33031 USA
关键词： Copper fungicide; column leaching; pore volumes; sequential fractionation; speciation
期刊名称：ENVIRONMENTAL POLLUTANTS AND BIOAVAILABILITY （ 影响因子：1.737； 五年影响因子：1.737 ）
ISSN： 2639-5932
年卷期： 2019 年 31 卷 1 期
页码：
收录情况： SCI
摘要： The transport and fractionation of copper (Cu) were investigated in three soils which were under continuous citrus production for over 30 years. The above soils received 50 kg Cu ha(-1), and were leached with eight pore volumes of water (equivalent to a total of 91 cm of rainfall). Following the completion of leaching, the leaching columns were sectioned into 5 cm depth increments for analyses of soil Cu. Concentrations of different forms of soil Cu were analyzed using a sequential fractionation procedure. The leaching column study indicated as much as 98% of the applied Cu remained in the upper 5 cm of the soil despite leaching eight pore volumes of water. Copper recovered in eight pore volumes of leachate accounted for 0.18-2.87% of Cu applied. The organically bound and precipitated forms of Cu accounted for 33-87% and 6-44% of total soil Cu, respectively.
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