Effects of Nitrogen Application Rate and Ratio of Base and Topdressing on Nitrogen Utilization and Soil NO3-N Content in Winter Wheat

SHI Gui-ping

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Effects of Nitrogen Application Rate and Ratio of Base and Topdressing on Nitrogen Utilization and Soil NO3-N Content in Winter Wheat

更新时间：2024-11-07

- Effects of Nitrogen Application Rate and Ratio of Base and Topdressing on Nitrogen Utilization and Soil NO3-N Content in Winter Wheat
- Vol. 20, Issue 5, Pages: 95-98(2006)
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  CLC： S143.1S512.1
- Published：2006
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SHI Gui-ping. Effects of Nitrogen Application Rate and Ratio of Base and Topdressing on Nitrogen Utilization and Soil NO3-N Content in Winter Wheat[J]. 2006, 20(5): 95-98.
DOI：

SHI Gui-ping. Effects of Nitrogen Application Rate and Ratio of Base and Topdressing on Nitrogen Utilization and Soil NO3-N Content in Winter Wheat[J]. 2006, 20(5): 95-98. DOI：

摘要

利用^15N同位素示踪技术研究了不同的施氮量和底追比例对小麦氮素利用和土壤硝态氮的影响。结果表明：底追比例均为5：5，处理2（纯氮施用量为168kg／hm^2）与处理1（纯氮施用量为240kg／hm^2）比较，处理2成熟期植株中土壤氮素的积累量，肥料氮的利用率均高于处理1的，但处理2的土壤硝态氮含量低；籽粒产量、蛋白质含量、湿面筋含量和面团稳定时间处理间无显著差异。纯氮施用量均为168kg／hm^2，氮肥全部用于拔节期追施的处理3与处理2比较，处理3成熟期植株中土壤氮素的积累量，籽粒蛋白质含量、面团稳定时间和0～40cm土层土壤硝态氮的含量均高于处理2的；肥料氮的利用率和籽粒产量处理间无显著差异。成熟期不同处理0～60cm土层土壤硝态氮含量均低于播种前，在60～80cm土层形成累积峰并高于播种前，但80cm以下层次与播前相比无明显差异。

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Effects of Nitrogen Application Rate and Ratio of Base and Topdressing on Nitrogen Utilization and Soil NO3-N Content in Winter Wheat

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