氮肥用量与施用方法对土壤养分与小麦生长的影响

发布时间：2018-07-31 08:43

【摘要】：【目的】探求小麦氮肥最佳用量与合理施用方法。【方法】本文开展了减少氮肥用量与不同施用方法对土壤养分及小麦生长影响的田间试验。【结果】减施一定量的氮肥,在小麦苗期土壤0~20 cm土层铵态氮含量与硝态氮含量并不显著减少,对小麦苗期土壤的有效磷与速效钾影响不明显;减施一定量的氮肥对小麦的叶绿素含量影响不显著;减施一定量的氮肥对小麦生长氮含量的影响不明显,但减少了小麦籽粒与秸杆的氮含量,对磷、钾的含量影响不明显。【结论】从经济与环境的角度综合考虑,减施20%氮肥是可行的。
[Abstract]:[objective] to explore the optimum application rate and reasonable application method of wheat nitrogen fertilizer. [methods] the field experiment of reducing the amount of nitrogen fertilizer and the effects of different application methods on soil nutrients and wheat growth was carried out. [results] A certain amount of nitrogen fertilizer was reduced. The contents of ammonium and nitrate in the soil layer of 20 cm in the seedling stage of wheat did not decrease significantly, but had no significant effect on the available phosphorus and available potassium in the soil of the seedling stage of wheat, but the effect of reducing a certain amount of nitrogen fertilizer on the chlorophyll content of wheat was not significant. The effect of reducing a certain amount of nitrogen fertilizer on the growth nitrogen content of wheat was not obvious, but it decreased the nitrogen content of wheat grain and straw, and had no obvious effect on the content of phosphorus and potassium. [conclusion] considering from the angle of economy and environment, It is feasible to reduce the application of 20% nitrogen fertilizer.
【作者单位】：农业部废弃物肥料化利用重点实验室湖北省农业科学院植保土肥研究所;湖北省赤壁市农业局;湖北省广水市农业局;
【基金】：国家重点研发计划项目(2016YFD0200109) 国家重点基础研究发展规划(973计划)项目(2013CB127400) 农业部公益性行业(农业)科研专项(201003016,201203030) 湖北省农业创新中心专项资金项目(2016-620-003-03) 湖北省农业科学院重大研发成果培育项目(2017CGPY01)
【分类号】：S158;S512.1

【相似文献】