优化施用钾肥对夏玉米产量及养分平衡的影响

Effect of Optimized Application of Potassium Fertilizer on Summer Corn Yield and Nutrient Balance

试验的研究目的主要是通过在田间设置6个不同的施肥处理,寻找在一定地区范围内玉米的最佳施肥处理。通过研究田间试验和养分测定结果表明,在试验的6个处理中,HK2处理(N240kghm-2、P2O5120kghm-2、K2O120kghm-2)的肥料用量是最适宜的,它不仅可以促进作物对养分的吸收,提高作物产量,也可以使农民获得最大的经济效益,还可以在一定程度上保持土壤肥力。

The purpose of this experiment is to determine fitting potassium fertilizer rate and appropriate proportion of N P K in given area by setting six treatments with different fertilizer rate on corn filed. The results show that HK2 treatment with N （240kg hm2） and P2O5 （120kg hm2） and K2O （120kg hm2） is the most appropriate fertilizer rate, which not only can promote uptake of nutrient and increase crop yield, but also can acquire the most economic benefit and retain soil fertility to some extent.