包膜肥料对水稻土壤渗滤液中NO2^--N、NO3^--N、NH4^＋-N的影响  

Effect of coated urea on NO_2-N,NO_3-N,NH_4^+-N in rice soil leachate

作　　者：韩艳玉[1] 邹洪涛[1] 张玉龙[1] 徐萌[1] 于洋[1] 刘洋[1] 王剑[1] 

机构地区：[1]沈阳农业大学土地与环境学院,农业部东北土壤与环境重点开放实验室,土肥资源高效利用国家工程实验室,辽宁沈阳110161

出　　处：《辽宁工程技术大学学报（自然科学版）》2011年第5期742-746,共5页Journal of Liaoning Technical University (Natural Science)

基　　金：国家自然科学基金资助项目(31000936);教育部重点资助项目(209032);中国博士后科学基金资助项目(20090450158);十一五国家科技支撑项目(2007BAD89B02)

摘　　要：通过有机玻璃土柱盆栽试验,研究了包膜肥料在水稻不同生育期对不同深度土层的土壤渗滤液中NO2--N、NO3--N、NH4+-N含量的影响。结果表明,土壤渗滤液中NO2--N、NO3--N、NH4+-N质量浓度随着水稻的生长逐渐降低;在水稻分蘖期和拔节期,随着土壤深度的增加NO2--N、NO3--N含量呈现先减小后增大的趋势,NH4+-N含量呈现先增大再减小再增大的趋势;在水稻抽穗期和成熟期,NO2--N、NO3--N含量呈现逐渐减小的趋势,NH4+-N含量呈现增大的趋势。在水稻生育期内与施用普通尿素UR相比,包膜肥料LP40、LPSS、SC60氮素渗滤损失总量分别降低了58.27%,46.38%,33.30%。A pot experiment was conducted to study the effect of coated urea on NO2--N,NO3--N,NH4＋-N in soil leachate in different soil layers at different rice growth stages.Results show that the NO2--N,NO3--N,NH4＋-N concentrations in soil leachate decrease with the rice growth.During tillering and joining stage,the NO2--N,NO3--N concentrations in soil leachate decrease earlier,and then increase later with soil depth increases.On the other hand,the NH4＋-N concentration in soil leachate increases earlier,then decreases and increases later.During heading and maturation stage,the NO2--N,NO3--N concentrations in soil leachate decrease as soil depth increases while the NH4＋-N concentration in soil leachate increases.Compared with UR,the total concentration of nitrogen leachate of LP40,LPSS,SC60 decrease 58.27%,46.38%,33.30% respectively.

关 键 词：包膜肥料 NO2--N NO3--N NH4+-N N 土壤渗滤液 水稻 环境影响 

分 类 号：X522[环境科学与工程—环境工程]