典型区域粮食作物产量、养分效率和经济效益关系实证研究

利用4个省农户生产的实地调研数据，系统分析了中国小麦、玉米、水稻的产量、养分效率和经济效益的现状及三者之间的关系，探讨了实现高产、高效和高收的限制因子。结果表明，目前农户在上述作物生产中，只有较少地块能够实现高产、高效和高经济效益的协调，而多数地块处于低产、低效和低经济效益的状态；随着农户施肥量的增加，作物产量并没有相应提高，两者相关不显著，但化肥利用效率与化肥投入量成显著负相关；随着产量的提高，化肥利用效率和农户的经济效益也显著增加，相关达到极显著水平。因此，在不增加投入的情况下，优化栽培管理技术增加作物产量是目前提高化肥利用效率和实现农民增收的重要途径。

Study on the Relationship Among Yield, Nutrient Efficiency and Benefits of Grain Crop

Based on the investigation data on farmers ' production in four provinces,this study systematically analyzed the current situation and the relationship among yields,nutrient efficiencies and economic benefits of wheat,maize and rice in China,respectively,and explored limiting factors on high yield,high nutrient efficiency and high economic benefit.The results showed that in study area only few farmers simultaneously achieved the high yield,high nutrient efficiency and high economic benefits,while most of th...