N肥深施深度对小麦吸收利用N的影响
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* 国家自然科学基金


EFFECT OF N APPLICATION DEPTHS ON ABSORPTION AND UTILIZATION OF NITROGEN BY WHEAT
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    摘要:

    本文应用15N示踪技术,在川中紫色土上进行了聚全的表层施肥(施肥深度1-2cm)、中层施肥(深施25cm)、底层施肥(深施45cm)和平作表层施肥不同处理小麦吸N特性等的研究。结果表明:N肥利用率是“平+表施”>“聚+底施”>“聚+中施”>“聚+表施”,处理间N肥利用率最高是23.78%,小麦一生有38.7-44.1%的N来自肥料。小麦拔节以前无论是聚土还是平作,其表层施肥地上部分NDFF值极显著地大于中层和底层施肥;“平+表施”、“聚+底施”、“聚+中施”比“聚+表施”显著地增加了小麦产量。

    Abstract:

    By means of 15N tracer technigue, the nitrogen absorption of wheat in different ways of soil fertility improvement was studied in purple soils of the Sichuan Basin. The results indicated that the utilization rates of different treatments were in the order of ordinary cultivation with surface layer fertilization (the fertilization depth of 1-2cm) >cultivation by gathering soil with deep layer fertilization (45cm) >cultivation by gathering soil with subsurface layer fertilization (25cm) >cultivation by gathering soil with surface layer fertilization(1-2cm), in which the most high rate was up to 23.78%, and 38.7-44.1% of nitrogen during wheat growth came from nitrogen fertilizer. Before wheat jointing stage. NDFF values of wheat above ground in the treatment of surface layer fertilization were much higher than those in the treatments of subsurface and deep layer fertilization. Some improvement ways including ordinary cultivation with surface layer fertilization and cultivation by gathering soil with deep and subsurface layer fertilization could significantly increase the yield of wheat.

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艾应伟,陈实,张先婉,徐佩,范志金. N肥深施深度对小麦吸收利用N的影响[J].土壤学报,1997,34(2):146-151. DOI:10.11766/trxb199502150205 Ai Yingwei, Cheng Shi, Zhang Xianwan, Xu Pei, Fan Zhijin. EFFECT OF N APPLICATION DEPTHS ON ABSORPTION AND UTILIZATION OF NITROGEN BY WHEAT[J]. Acta Pedologica Sinica,1997,34(2):146-151.

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  • 收稿日期:1995-02-15
  • 最后修改日期:1996-08-20
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  • 在线发布日期: 2013-02-25
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