绵农4号、绵农3号小麦品种分蘖特性探讨

Tillering and Earbearing Characteristics of Wheat Varieties “Miannong 4"and “Miannon 3

在 3种密度下对绵农 4号、绵农 3号的分蘖及成穗特性进行了初步研究 ,结果表明 :绵农 4号、绵农 3号的分蘖速度和分蘖力皆为中等 ,中等密度条件下 ,有效分蘖期每天可形成 0 .15蘖 ,各期总蘖数为 3.7左右 ,低于绵阳 11号 ;与绵阳 11号分蘖速度的差异主要在有效分蘖期 ;绵农 4号、绵农 3号的成穗率为 55%左右 ,低于绵阳 11号 ;但分蘖和主穗的差异较小 ,分蘖穗重占主穗重的 80 %左右 ,茎蘖穗重变异系数 15%左右 ,穗子大小均匀一致 ,小穗相对较少 ,小穗较大 ,这些性状都优于绵阳 11号。绵农 4号、绵农 3号大穗大粒特性较绵阳 11号更为突出 ,其常规种植密度应小于绵阳

Tillering and earbearing characteristics of wheat varities “Miannong 4'and “Miannon 3' were studied under three densities.The results indicated that the two varieties had medium tillering speeds and tillering numbers ,and their tillering number under medium density was 3.7 tillers per plant,which is less than that of “Mianyang 11',a popular wheat variety in Sichuan in 1980s.Their percentage of earbearing was about 55%,which is also lower than that of “Mianyang 11'.There was little difference among grain weights of all ears from a plant.They had more obvious characteristics with big ear and big grain than “Mianyang 11',and should have lower density than “Mianyang 11' in conventional cultivation.