崇明岛典型果园氮素渗漏流失研究  

Nitrogen leaching losses in typical orchard of Chongming island

作　　者：李双喜[1,2] 袁大伟[1,2] 郑宪清[1,2] 宋科[1,2] 何七勇[1,2] 吕卫光[1,2] 

机构地区：[1]上海市农业科学院生态环境保护研究所,农业部上海农业环境与耕地保育科学观测实验站,上海市设施园艺技术重点实验室 [2]上海市农业环境保护监测站,上海201403

出　　处：《江苏农业学报》2012年第4期771-776,共6页Jiangsu Journal of Agricultural Sciences

基　　金：上海科技兴农重点攻关项目(沪农科攻字<2006>第2-2号);上海市科委科技攻关项目(08DZ1206000);国家财政部"农业立体污染防治科学创新条件建设"项目(140102-9)

摘　　要：为研究崇明岛柑橘园氮素渗漏淋失特征,采用田间原位小型土壤渗漏计法,分析土壤中氮素含量与渗漏水中氮素含量之间的关系。结果表明:随着土壤深度的增加,土壤中NH4+-N和NO3--N含量显著下降,渗漏水中NO3--N、NH4+-N含量逐步降低。0～20 cm和21～40 cm渗漏水中NH4+-N和NO3--N含量随时间延长呈现出由低到高再降低的变化特征。浅层渗漏水中氮素渗漏流失以水溶性总氮为主,NO3--N含量占水溶性总氮的比例超过90%。果园渗漏水中氮素含量与土壤中氮素含量之间相关性极显著,表明果园施肥量与渗漏水中氮素含量之间存在联系。In order to investigate the nitrogen leaching losses in the orchid of Chongming island, the nitrogen con-tents in soil and in leakage was detected by soil solution extractor. As the depth of soil increased, the contents of ammoni-um nitrogen and nitrate nitrogen in soil significantly drop, and those in soil leakage gradually declined. The contents of am-monium nitrogen and nitrate nitrogen in soil leakage at depths of 0-20 cm and 20-40 cm presented the character of ＂low-high-low＂. The major pattern of nitrogen leaching loss was water-soluble total nitrogen, over 90% of which was nitrate ni- trogen. The nitrogen accumulations in soft showed a significantly positive correlation with that in leakage, indicating a posi-tive connection between orchard fertilization level and nitrogen concentration in soil leakage.

关 键 词：果园 氮素 渗漏淋失 崇明岛 

分 类 号：S152.72[农业科学—土壤学]