污泥对赤红壤坡地磷素随地表径流流失的影响  

Effects of Sewage Sludge on Phosphorus Loss along Surface Runoff from Sloping Plots on a Lateritic Red Soil

作　　者：陈炎辉[1] 陈明华 王果[1] 陈文祥 杨舜成 张在杰[1] 伍文俊[1] 

机构地区：[1]福建农林大学资源与环境学院,福州350002 [2]福建省水土保持试验站,福州350003

出　　处：《水土保持学报》2009年第6期28-32,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：在人工模拟降雨条件下,研究了污泥施用量对赤红壤坡地磷随径流流失的影响。结果表明,污泥撒施1d后的径流中混匀样总磷(MTP)、静置样总磷(STP)、颗粒态总磷(TPP)、悬浮态总磷(TSP)和可溶性总磷(TDP)浓度均达到峰值,撒施(60t/hm2)对应峰值分别为4.22,1.58,3.84,1.20,0.38mg/L,为撒施(120t/hm2)对应峰值的40%～96.8%,此后撒施径流磷素浓度呈递减趋势,施用量引起的撒施径流磷素浓度差异逐渐变小。模拟试验期内,随污泥用量的增加,撒施径流磷素平均浓度不同程度随之升高,但撒施径流磷素流失量未必随之升高;污泥用量对穴施径流磷素浓度和流失量无明显影响。撒施径流46.0%～67.8%MTP和62.2%～74.6%STP流失量发生在污泥施用前期(1d和18d)径流中。MTP径流流失系数依次为撒施(60t/hm2)>撒施(120t/hm2)>穴施(120t/hm2)>穴施(60t/hm2)。颗粒态磷是磷随径流流失的主要形式。The effects of different application rate of sewage sludge on phosphorus loss along surface runoff from sloping plots on a lateritic red soil were studied under simulated rainfall conditions. When the sludge was broadcasted and mixed with surface soils （BM）,the MTP （total phosphorus of mixing sample）,STP （total phosphorus of settled sample）,TPP （total particulate phosphorus）,TSP （total suspended phosphorus） and TDP （total suspended phosphorus） concentrations were highest 1 day after application,the corresponding peak values of the BM with the rate of 60 t/hm^2 were 4.22,1.58,3.84,1.20,0.38 mg/L,respectively,40%-96.8% of the corresponding peak values of the BM with the rate of 120 t/hm^2. Then the concentrations of MTP,STP,TPP,TSP and TDP from the BM treatments diminished gradually with time with dwindling differences between the application rates. During the whole experimental period,the mean concentrations of phosphorus in the slope runoff for the BM treatment increased with the increase of application rate to different degrees whereas it was not certainly the case for the mean loss amounts of the phosphorus. Sludge application rate had no significant effects on the mean concentrations and the loss amounts of the phosphorus in the runoff for the hole-application （HA）treatment. The loss of MTP and STP cumulative loss amounts during the experimental period in MTP and STP for all the broadcasted treatments. Runoff loss coefficients of MTP increased in the order of BM （60 t/hm2）〉BM（120 t/hm2）〉HA（120 t/hm2）〉HA（60 t/hm2）. Particle-bound phosphorus was the major form for phosphorus loss along with the runoff.

关 键 词：施用量 模拟降雨 坡地 径流 污泥磷 

分 类 号：S151.9[农业科学—土壤学] S157.1[农业科学—农业基础科学]