以汕优 63和 951 6为材料 ,通过密肥措施 ,培育不同产量的群体 ,研究水稻有效分蘖叶龄期 ( N-n)的株型特征及其与产量关系。结果表明 :高产群体 N-n期叶开角较大 ,叶长适中而稍长 ,叶片的松散度较大 ;叶片较厚 ,叶绿素含量高 ;叶面积增长缓慢 ,叶面积指数较小 ;叶鞘积累快 ,单位叶鞘重量承载的叶面积小等 Taking Shanyou 63 and 951 6 as materials, the population-type characteristics of different tillering and tillering stages (N-n) and their relationship with yield were studied through intensive measures. The results showed that the leaves of high-yielding population had larger open-angle leaves, longer and longer leaves, more leaf looseness, thicker leaf leaves and higher chlorophyll content, slower leaf area growth, smaller leaf area index, faster accumulation of leaf sheaths, Unit leaf sheath weight bearing small leaf area