坡度对酸性土坡地上污泥铜随径流迁移的影响  

Copper Transport along with Runoff from Sloping Plots Amended with Sewage Sludge on Different Slopes

作　　者：陈炎辉[1] 柴鹏 王果[1] 陈文祥 陈明华 肖振林 黄瑞卿 

机构地区：[1]福建农林大学资源与环境学院,福建福州350002 [2]福建省水土保持试验站,福建福州350003 [3]福州市农产品质量安全检验检测中心,福建福州350004

出　　处：《水土保持学报》2008年第4期16-20,共5页Journal of Soil and Water Conservation

基　　金：教育部重点项目(204075);福建省教育厅重点项目;福建省科技厅重大专项前期研究项目(2005YZ1001)

摘　　要：研究了人工模拟降雨条件下，坡度对撒施于酸性赤红壤坡地的污泥铜随径流的迁移情况。结果表明．污泥撒施1d后的径流中混匀样总铜（MTCu）、静置样总铜（STCu）、颗粒态总铜（TPCu）、悬浮态总铜（TSCu）浓度和流失量均达到峰值，大小依次为25°〉20°〉15°〉10°，其中25°MTCu、STCu浓度和流失量峰值分别高达6475．8，300．2μg／L和90．78．4．32mg／m^2，分别是10°对应峰值的4．6，3．4倍和5．7，4．6倍。随时间推移，各坡度撒施径流MTCu，STCu，TPCu，TSCu浓度和流失量总体呈递减趋势，坡度引起的径流同期铜浓度和流失量差异逐渐变小。10°～25°处理径流中75．4％～92．9％MTCu和65．1％～73．5％STCu流失量发生在污泥撒施前期（1d和18d）径流中．MTCu径流流失系数为0．48％～1．75％，颗粒态铜是铜随径流流失的主要形式。The effects of different slopes on Cu transport along with runoff from sloping plots amended with sewage sludge on a lateritic red soil were studied under simulated rainfall conditions. When the sludge was broadcasted and mixed with surface soils, the MTCu （total Cu of mixing sample）, STCu （tots1 Cu of settled sample）, TPCu （total particulate Cu） and TSCu （total suspended Cu） concentrations and Cu loss amounts in runoff of all treatments were highest at 1 day after application, increasing in the order of 25°〉20°〉15°〉 10°. The MTCu, STCu concentration and Cu loss amounts of 25° treatment were 6 475. 8, 300. 2μg/L and 90. 78, 4.32 mg/m2, respectively, being 4.6, 3.4 times and 5.7, 4.6 times of the corresponding values of 10° treatment, respectively. Both the concentrations and the loss amounts of MTCu, STCu, TPCu and TSCu resulted from the broadcasted plots diminished gradually with time, and the difference among the different slopes was narrowed. The loss of MTCu and STCu in early runoff （1 day and 18 days） accounted for 75.4%-92.9% and 65.1%-73.5% of the cumulative loss amounts during the experimental period in MTCu and STCu for all the broadcasted treatments. Runoff loss coefficients of MTCu were 0.48%-1.75%. Particlebound Cu was the major form for the Cu lost along with the runoff.

关 键 词：坡度 模拟降雨 坡地 径流 污泥铜 

分 类 号：S157[农业科学—土壤学]