氮肥减施及双氰胺施用对滇池北岸蔬菜地土壤氮素流失影响  

Dicyandiamide Application Reduces Nitrogen Loss from the Vegetable Field on the Northern Bankside of Dianchi Lake

作　　者：张瑞杰[1,2] 林国林[2] 胡正义[1,3] 逄玉万[1,4] 殷小锋[1,5] 吴永红[1] 

机构地区：[1]中国科学院南京土壤研究所土壤与农业可持续发展国家重点实验室,江苏南京210008 [2]沈阳农业大学土地与环境学院,辽宁沈阳110161 [3]中国科学院研究生院,北京100049 [4]广东省农业科学院土壤肥料研究所,广东广州510640 [5]南京农业大学资源与环境学院,江苏南京210095

出　　处：《水土保持学报》2008年第5期34-37,共4页Journal of Soil and Water Conservation

基　　金：国家863计划项目(2005AA601010-02);中国科学院知识创新工程重要方向项目(KSCX2-YW-N-038)

摘　　要：在滇池北岸韭黄生产基地采用田间试验的方法,研究了氮肥减施及双氰胺(DCD)施用对土壤氮素流失的影响。结果表明:减施20%的氮肥,韭黄产量无明显减少,但可以分别减少淋溶、侧渗、径流水氮损失37.0%,22.2%和28.9%左右,减少韭黄硝酸盐含量13.6%左右。减施20%氮肥后配施双氰胺,可以增加韭黄产量8.7%左右,分别减少淋溶、侧渗、径流水氮损失58.4%,59.7%和17.1%左右,减少韭黄硝酸盐含量24.8%。因此,该技术对减少滇池北岸韭黄地氮素流失和降低韭黄硝酸盐含量具有重要实践意义和推广价值。One field experiment was conducted in the yellow Chinese chive production system on north bank of Dianchi Lake to investigate the effects of reducing amount of nitrogen fertilizer and the application of Dicyandiamide（DCD）on losses of nitrogen from the vegetable field. Results indicated that the treatment of decrease of N by 20% reduced the TN content of leaching,lateral leaching and runoff by 37.0% ,22.2% and 28.9% respectively; the treatment also reduced the nitrate content of yellow Chinese chive by 13. 6% and had no obviously effect on its yield. The application of DCD on the base of reducing nitrogen reduced the TN content of leaching,lateral leaching and runoff by 58.4%,59.7% and 17.1% respectively. While it increased the yield of yellow Chinese chive by 8.7% and reduced its nitrate content by 24.8%. Therefore,reducing the amount of nitrogen fertilizer and applying DCD may be important measures to reduce nitrogen losses from the Yellow Chinese Chive fields and reduce the nitrate content of yellow Chinese chive. The technique would have important practical significance and be of good popularization value, in the study area.

关 键 词：双氰胺 氮损失 蔬菜地土壤 滇池 

分 类 号：S143.1[农业科学—肥料学]