杂种棉优势的研究

Research on the advantage of crossbred cotton

杂种棉与常规棉相比 ,生育过程表现出明显优势 ,出苗提早 2天 ,现蕾提早 3天 ,开花提早 2天 ,吐絮提早 1天 ,全生育期提早 2 - 5天 ,生长速度平均每天多增加 0 .1～ 0 .8g ,叶面积每天多增加 0 .0 0 7～ 0 .0 30m2 ,单株铃数杂交棉比常规棉高 1～ 2个 ,单铃重增 0 .1～ 0 .6g .

Compared with normal bred cotton,the growing process of crossbred cotton expressed the obvious advantage:seedings and buds blossom 2 days in advance,catkins 1 day in advance;the whole growing period was shortened by 2-5 days;by the average growing speed its weight increased,0.1-0.8 everyday;leaf′s area increased by 0.007-0.03 everyday;the number of cotton bells in individual plant was 1-2 more than normal bred cotton;the single cotton bells was 0.1-0.6 g heavier.