长期施肥对塿土硝态氮分布、累积和移动的影响  

A long-term experiment on effect of organic manure and chemical fertilizer on distribution,accumulation and movement of NO_3-N in soil

作　　者：杨学云 张树兰 袁新民 同延安 

机构地区：[1]陕西省土壤肥料研究所,陕西杨凌712100

出　　处：《植物营养与肥料学报》2001年第2期134-138,188,共6页Journal of Plant Nutrition and Fertilizers

基　　金：全国化肥试验网资助项目

摘　　要：利用 18年长期定位试验研究了冬小麦 夏玉米轮作制度下 ,有机 无机肥配合施用对土剖面NO3 N的分布累积和阶段性移动的影响。结果表明 ,土壤剖面中NO3 N的总量与氮肥施用量直接相关 ,而作物对化肥氮的利用率与施肥量呈相反趋势。低氮处理 (75kg/hm2 )及其与有机肥配合施用 ,NO3 N主要累积在 0～ 10 0cm土层内 ;高氮处理 (12 0kg/km2 )及其与有机肥配合施用 ,NO3 N在剖面出现 2个累积峰 ,且在 4 0 0cm土层处NO3 N的含量接近或超过 10mg/kg。适宜的氮肥用量、施用有机肥及合理的有机 无机肥料配比是减少NO3A 18 years' fertilizer experiment was conducted in cumulic cinnamon soil to study the distribution,accumulation and movement of NO 3 N in 4 m depth profile with application of organic manure combined chemical fertilizer in the winter wheat corn crop system per year The results showed that NO 3 N was mainly accumulated in 0 to 100cm depth soil profiles for most treatments, and total amount of NO 3 N in the soil profiles was related to the N rate There were two peaks of NO 3 N accumulation in the high N (120 kg/hm 2) and low N (26 kg/hm 2) treatments with or without organic manure, and the content of NO 3 N at the depth of 4 m layer was over 10 mg/kg Suitable fertilizers rate, application of organic manure, and organic manure combined chemical fertilizer with a proper ratio is the effective ways to control accumulation of NO 3 N in soil profiles and leaching loss

关 键 词：硝态氮 分布 积累 有机肥 化肥 LOU土 氮肥利用率 阶段性移动 

分 类 号：S147[农业科学—肥料学]