肥料与密度对南校205玉米农艺性状及产量的影响

以玉米新品种南校205为试验材料,研究肥料和密度对其主要农艺性状和产量的影响.结果表明,肥料和密度对南校205的农艺性状和产量影响显著.在4个施肥水平中,A1水平在穗长、穗粗、穗行数、行粒数、产量等方面都具有最大值.密度对穗长、穗粗、行粒数、千粒重及产量均有显著影响,穗长、穗粗、穗粒数、干粒重整体上均随着密度的增高而降低,产量却随着密度的增高而逐渐增加,当密度为67 500株/hm2时产量最高.综合考虑肥料和密度因子,最佳处理组合为A2B4,即种植密度为67 500株/hm2,施肥量为纯N 225 kg/hm2、P2O5 75 kg/hm2、K2O 187.5 kg/hm2.

Effect of fertilizer and density on characters and yield of maize Nanxiao205

Effects of different fertilizers and density on main characters and yield of hybridmaize Nanxiao205 were studied. The results showed that the fertilizer and density had obvious effects on the agronomic characteristics and yield of Nanxiao205. In four fertilizer treatments, A1treatment had the largest value in spike length, diameter, kernel weight and yield. Density had a significant impact on the spike length, diameter, rows per ear, kernel weight and yield. The length, diameter, kernel number and kernel weight decreased as the density increased. But the yield rised as the density increased, the yield reached the highest when the density was 67 500 plants/hm2.The optimally treatment combination should be A2B4, at this time, the planting density was 67 500 plants/hm2 and the pure nitrogen was 225.0 kg/hm2, P2O5 was 75.0 kg/hm2, K2O was 187.5 kg/hm2.