Mineral N Distribution in Soil Profiles of Slope Land in Gully Region of Loess Plateau

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Publication date
1 January 2003
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Abstract

以黄土高原沟壑区典型小流域为基础,选择不同利用年限的坡地果园分析了矿质氮在土壤剖面中的分布特征及其影响因素。研究发现,化肥投入显著提高了硝态氮在100～200cm土层分布与积累。随着果园利用年限的延长,土体剖面硝态氮的积累量呈显著增加的趋势,但施肥不影响铵态氮在土层的分布特征。坡地果园中化肥的挖沟深施,长期的氮肥投入和果园土壤水分的逐渐耗竭降低是产生硝态氮深层积累的重要因素

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    Institute of Soil and Water Conservation,Chinese Academy of Sciences and Ministry of Water Resources

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