机构地区: 河南科技大学
出 处: 《华北农学报》 2005年第2期66-71,共6页
摘 要: 针对华北平原冬小麦生产中氮肥及灌水存在严重浪费,进而引起环境污染问题进行了研究。在传统灌溉-优化施肥、优化灌溉-传统施肥、优化水肥、秸秆还田优化水肥及传统水肥条件下,冬小麦单位面积收获穗数和子粒产量无显著性差异。优化水肥和秸秆还田优化水肥冬小麦穗粒数显著减少,千粒重显著提高。所有处理间冬小麦水分利用效率无显著性差异。传统灌溉-优化施肥、优化水肥及秸秆还田优化水肥氮肥当季利用率显著提高,因此达到了挖掘冬小麦的节肥潜力,提高优化灌溉条件下氮肥利用效率的目的。 The experimental results showed insignificant difference in the ear number per unit area and grain yield of winter wheat between the traditional irrigation-optimized fertilization, optimized irrigation-traditional fertilization, optimized irrigation-optimized fertilization, optimized irrigation-optimized fertilization with crop residues, and traditional irrigation-traditional fertilization; the greatly reduced grain number per ear and significantly heavier weight of 1 000 grains of the optimized irrigation-optimized fertilization and optimized irrigation-optimized fertilization with crop residues; the significantly higher nitrogen use efficiency of the traditional irrigation-optimized fertilization,optimized irrigation-optimized fertilization and optimized irrigation-optimized fertilization with crop residues; and indistinct difference in water use efficiency between the five treatments.
关 键 词: 资源利用效率 优化组合模式 产量形成 优化水肥 显著性差异 环境污染问题 秸秆还田 水分利用效率 优化施肥 冬小麦生产 华北平原 优化灌溉 水肥条件 子粒产量 收获穗数 单位面积 灌溉条件 传统 中氮肥 利用率 灌水 穗粒