高产春玉米产量及其构成与氮磷钾施用量关系研究

A Study on the Correlation bewteen NPK Application and the Yield and Yield Components of High Yield Spring Maize

在吉林省中部通过田间试验的方法，探讨了氮、磷、钾施用量对高产春玉米产量及其构成的影响。结果表明：在本试验条件下，施N26．7～33．3kg／667m2、P20513．3～20kg／667m2、K2013．3～20kg／667m2，产量均达到900kg／667m2以上的高产水平，单位面积（667m2）穗数、穗粒数和千粒重分别达4602穗、540粒和410g以上。其中施N26．7kg／667m2，P20513．3kg／667m2，K2013．3kg／667m2处理的产量、单位面积（667m2）穗数、穗粒数和千粒重最高，平均值分别为973．5kg／667m2、4749．5穗、571．7粒和437．2g。施氮处理对单位面积（667m2）穗数的影响最大，施磷处理对穗粒数和千粒重的影响最大。

The effect of NPK application on the yield and yield component factors of spring maize were investigated by the field experiment in the middle of Jilin province. The resuhs showed that the yield of spring maize exceeded 900 kg/667m2, ear number of per 667m2 was over 4 602, grain number of per ear was over 540 and thousand grain weight was over 410 g, when the amount of fertilizer application was N 26.7--33.3 kg/667m2,p205 13.3--20 kg/667m2 and K20 13.3--20 kg/667m2 respectively.Yield, ear number per 667m2, grain number per ear and thousand grain weight were the highest when the amount of fertilizer application was N 26.7 kg/667m2, P20513.3 kg/667m2, K20 13.3 kg/667m2 respectively. Under the treatment, the yield of spring maize was 973.5 kg/667m2, ear number per 667 m2 was 4 749.5, grain number per ear was 571.7 and thousand grain weight was 437.2 g. The treatments of N application have the greatest effect on ear number per 667 m2;on the contrary,P205 treatments have the greatest effect on the grain number per ear and thousand grain weight.