早稻新品系“921”丰产稳产性分析及高产栽培探讨

Analysis of productivity and stability of early rice new strain “921” and its study on high yield culture

对湖北省１９９４～１９９５年早稻中熟组良种区域试验资料进行统计分析表明，早稻新品系“９２１”不仅高产、稳产，且适应性广；三要素对产量的贡献为千粒重＞穗粒数＞有效穗数；“源”丰、“流”畅、“库”大，彼此协调是其高产的根本原因。其高产栽培的主攻方向应在一定有效穗数的基础上增加每穗实粒数。

Analysis on the information of mid ripe early rice regional tests in Hubei during 1994～1995, the results indicated that early rice new strain “921” has high and stable yield and wide adaptation. The 3 components' contribution to yield is:1000 grain weight>No. of grain per ear>No. of effective ear. “921” is rich in source, easy and smooth in flow and has enough sink. Its high yield lies mainly in its coordinate with each other. The direction of further high yield culture could be attained by combining No. of effective ear per unit area and greater No. of grain per ear.