摘要
黑土、潮土和红壤在我国主要的耕作土壤中占有很大比重。选取黑土、潮土和红壤作为研究对象,采用人工模拟降雨的试验方法,研究了不同降雨强度和土壤磷含量对黑土、潮土和红壤地表径流磷浓度和磷流失量的影响。结果表明:(1)黑土、潮土和红壤径流中ρ(TP)为0.143~1.220 mg·L^-1,ρ(TDP)为0.035~0.474 mg·L^-1,不同类型土壤地表径流中TP和TDP浓度大小顺序为潮土>红壤>黑土。(2)土壤表层径流中磷浓度大小主要取决于地表有效磷含量,地表径流中TP流失量与土壤磷含量呈指数关系。(3)黑土、潮土和红壤径流中TP和TDP浓度随着降雨强度的增加而增加,不同土壤径流中TP流失量与降雨强度均存在线性关系,潮土的线性关系最好,其次是黑土和红壤。(4)黑土、潮土和红壤地表径流磷流失的主要形态是颗粒态。
Black soil,fluvo-aquic soil and red soil were the main cultivated soil types in China.A simulated rainfall experiment was conducted to study the effects of different rainfall intensity and phosphorus levels on phosphorus concentration and loss in the above-mentioned 3 kinds of soil types.The results show that:(1)The TP content in black soil,fluvo-aquic soil and red soil runoff ranged from 0.143 to 1.220 mg·L-1,and the TDP content ranged from 0.035 to 0.474 mg·L-1.The TP and TDP concentrations in different soil types were in the order of fluvo-aquic soil>red soil>black soil.(2)The concentration of phosphorus in runoff mainly depended on the content of available phosphorus in the surface soil.There was an exponential relationship between TP loss and soil phosphorus level.(3)The concentrations of TP and TDP in black soil,fluvo-aquic soil and red soil runoff increased with the rainfall intensity.There was a linear relationship between total phosphorus loss and rainfall intensity in different soil runoff.The linear relationship of fluvo-aquic soil was the best,followed by black soil and red soil.(4)The main form of phosphorus loss from surface runoff was granular.
作者
刘娟
张淑香
宁东卫
张乃明
LIU Juan;ZHANG Shu-xiang;NING Dong-wei;ZHANG Nai-ming(College of Plant Protection,Yunnan Agricultural University,Kunming 650201,China;Yunnan Soil Fertility and Pollution Remediation Laboratory,Kunming 650201,China;Institute of Agricultural Resources and Regional Planning,Chinese Academy of Agricultural Sciences,Beijing 100081,China;College of Water Conservancy,Yunnan Agricultural University,Kunming 650201,China)
出处
《生态与农村环境学报》
CAS
CSCD
北大核心
2019年第10期1346-1352,共7页
Journal of Ecology and Rural Environment
基金
国家重点研发计划(2016YFD0201208-2)
云南省科技合作计划项目院士工作站(2015IC022)
关键词
磷
地表径流
非点源污染
耕作土壤
phosphorus
runoff
non-point source pollution
cultivated soil
