田埂宽度对水田无机氮磷侧渗流失的影响  

Effects of field ridge width on lateral seepage loss of inorganic N & P in rice field

作　　者：周根娣[1] 梁新强[2] 田光明[2] 陈其峰[1] 俞周杰[1] 陈静[1] 

机构地区：[1]杭州师范学院,杭州310006 [2]浙江大学环境与资源学院,杭州310029

出　　处：《上海农业学报》2006年第2期68-70,共3页Acta Agriculturae Shanghai

基　　金：国家重点基础研究发展规划资助项目(2002CB410807);浙江省自然科学基金(Y504247)

摘　　要：对杭嘉湖地区稻田土壤氮磷侧渗流失的研究结果表明,稻田土壤侧渗流失是氮磷流失的一个重要途径。田埂对水田的无机氮磷的侧渗有明显的截留作用,且截留效果与田埂宽度及其土壤紧实度密切相关,截留效果在氮磷的不同形态上也表现出一定的差异,其中对氨氮和磷酸盐的侧渗截流作用比较明显,对硝氮的作用则较小。The investigation on the lateral seepage of inorganic N ＆ P in rice fields of Hangzhou, Jiaxing and Huzhou areas showed that the lateral seepage is an important way of the N ＆ P loss and the field ridge has an obvious effect on keeping the N ＆ P in rice field from seepage loss. The intercepting effect is closely related to the field ridge width and the soil compaction and also different on various forms of N and P. The intercepting effect is comparatively evident on ammonium nitrogen and phosphate but less on nitrate nitrogen.

关 键 词：侧渗 稻田 氮 磷 农业非点源污染 

分 类 号：S606[农业科学—园艺学]