氮磷钾肥料配施对松玉419产量及其构成因素的影响

摘要

以松玉419为试验材料,通过氮、磷、钾肥料量级田间试验,建立不同肥料施用量与玉米产量关系,获得玉米最佳施肥量以及最高理论产量,并通过对产量及其构成因子之间的相关分析,进一步确定各产量构成因素对产量的影响,为制定春玉米高产施肥策略提供参考.结果表明:公顷施纯氮202 kg、P2O597.5kg、K2O 58 kg,产量最高为12 243 kg/hm2.黑土区玉米连作下松玉419施肥原则为稳氮、增磷、减钾.%Songyu 419 was used as materials and a field experiment was carried out to study effects of nitrogen,phosphorus and potassium application on grain yield and yield components of spring maize.Relationship was established between levels of fertilizer and grain yield and the maximum theoretical yield was obtained.The correlation analysis between the grain and yield components defined the effects of them on yield.The results proved that yield of maize was highest,12 243 kg/ha,under the conditions of pure nitrogen 202 kg/ha,P2O5 97.5 kg/ha,K2O 58 kg/ha.Based on the results,we proposed the method of fertilizer application,i.e.keeping application amount of nitrogen stable,increasing phosphorus amount and reducing potassium amount under continuous cropping of maize in black soil area and we hope that the results could provide reference for the development of high yield of spring maize fertilization strategy.