不同农田产量水平下养分管理措施对冬小麦产量·养分效率的影响

目的]为探讨不同养分管理措施对冬小麦产量和养分利用效率的影响。方法]通过在河北辛集的32点田间试验,对高、中、低不同产量水平下农民习惯养分管理模式与基于养分平衡原理的优化养分管理措施对冬小麦产量和养分利用率的影响进行了探讨。结果]在不同产量水平下,优化养分处理的籽粒产量、氮素回收率、农学效率和氮肥偏生产率均高于农民习惯处理。随着产量水平的提高,优化处理的小麦产量比农民习惯处理增加的幅度逐渐降低。在所有处理中,氮素回收率、农学效率、氮肥偏生产率和经济效益均以高产水平下的优化养分处理为最高。结论]基于养分平衡的优化养分管理模式对提高小麦产量和养分利用效率有良好的效果。

Effects of Different Nutrient Management Strategies on Wheat Yield and Nutrient Use Efficiencies under Different Yielding Level

Objective] The research aimed to study the effects of different nutrient management strategies on wheat yield and nutrients use efficiency.Method] 32 points field experiments,which including high,middle and low yielding level fields,were conducted in Xinji,Hebei Province.And the effects of traditional farmer practice(FP) and optimum nutrient management treatment(OPT)on wheat yield and niutrient use efficiencies were studied.Result] The optimum nutrient management treatment significantly increased wheat yield,N recovery rate,agnomic efficiency and N partial factor efficiency compared with traditional farmers practice.When the field yielding level was increased,the wheat yield increasing rate of OPT than FP treatments increased.Of all the treatments,OPT treatments under high yielding level got the highest nitrogen recovery rate,agronomic efficiency and partial factor efficiency.Conclusion] The optimum nutrient management strategies based on balanced fertilization technology had the potential to increase the wheat yield and nutrient use efficiency.