播种方式对不同类型小麦品种产量性状的影响

在不同种植方式下，对豫麦１８号、豫麦２１号、豫麦４９号、９３中６等４个不同类型小麦品种的产量构成因素进行了研究。结果表明，等行距与宽窄行之间产量无明显差异，低播量、高播量下差异均达极显著水平。叶面积系数从开花到乳熟都呈下降趋势，只有９３中６呈上升趋势，豫麦２１号、豫麦４９号、豫麦１８号间无差异。豫麦１８号灌浆速度最快，豫麦２１号最慢，豫麦４９号和９３中６相比，前者前期灌浆快，后者一期灌浆快，９３中６硝酸还原酶活性最高。豫麦１８号次之，豫麦２１号第３，豫麦４９号最低。

Effect of Planting-method on Wheat Yield Components of Different Variety Types

This paper studied yield components of four wheat varieties under the different planting method.The result showed that there was no significant difference between 15 cm equidistant row spacing and 20 cm 10 cm wide narrow row.A significant difference among varieties under the low density and high density was existed.Dynamic change of leaf area index was different significantly among varieties.From flowering to milk ripe stage,it has descend trend,only 93zhong6 has ascend trend ,The results also showed that its leaf function period lasted longer,it was beneficial for kernel filling.Yumai 18 had fast kernel filling,high grain weight;Yumai 21had slowest kernel filling,low 1000 kernel weight and lower yield;comparing Yumai 49 with 93zhong6 ,in pre filling stage, yumai 49 surpass 93zhong6 ,but in later stage, 93zhong6 exceed yumai 49. 93zhong6 had the highest NRA, Yumai 18 was second, Yumai 21 was third,yumai 49 was the lowest.