摘要： 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，后者后期灌浆快，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。

关键词: 播种方式, 小麦品种, 产量构成因子

Abstract: This paper studied yield components of four wheat v arieties under the different planting-method.The result showed that there was n o 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 andhigh density was existed.Dynamic change of leaf area index was different si gnificantly among varieties.From flowering to milk ripe stage,ithas descend tre nd,only 93zhong6has ascend trend ,The results also showed that its leaf funct ion per iod lasted longer,it was beneficial for kernel filling.Yumai 18had fast kern el filling,high grain weight;Yumai 21had slowest kernel filling,low 1000 kerne l weight and lower yield;comparing Yumai 49 with 93zhong6 ,in pre-fillin g sta ge, yumai 49 surpass 93zhong6 ,but in later stage, 93zhong6 exceed yumai 49. 93zhong6had thehighest NRA, Yumai 18 was second, Yumai 21 was thir d,yumai 49 was the lowest.

Key words: Planting-method, Wheat Variety, Yield components

中图分类号: 

• S512.104