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作 者 ：杨学云;张树兰;袁新民;同延安

期 刊 ：植物营养与肥料学报 2001年 7卷 2期 页码：134-138

关键词：硝态氮；分布；积累；有机肥；化肥；

Keywords:NO3-N, distribution, accumulation, organic manure, chemical fertilizer,

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 0～100cm土层内 ;高氮处理 (120kg/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400cm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NO₃-N在土壤剖面中的累积和淋失的有效措施

Abstract:A 18 years‘ fertilizer experiment was conducted in cumulic cinnamon soil to study the distribution,accumulation and movement of NO₃-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 NO₃-N was mainly accumulated in 0 to 100cm depth soil profiles for most treatments, and total amount of NO₃-N in the soil profiles was related to the N rate There were two peaks of NO₃-N accumulation in the high N (120 kg/hm²) and low N (26 kg/hm²) treatments with or without organic manure, and the content of NO₃-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 NO₃-N in soil profiles and leaching loss

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