【摘要】 据两年资料分析，玉米叶面积指数与产量呈正相关（ｒ＝０．９３９８）．壮丰灵能适度控制叶面积指数高峰，延长叶面积指数稳定期，这是壮丰灵能改善叶面积群体结构所致．光合势的动态变化和叶面积指数是基本一致的，壮丰灵能提高乳熟期光合势，并有利于产量形成．更多还原

【Abstract】 There is positive correlation between corn leaf area index and yield. Zhuang Feng ling can appropriately control the peak of leaf area index, prolong its stationary stage, because it can improve the group structure of leaf area. The dynamic change of photothetic potential is the same as that of leaf area index, Zhuang Feng Ling can improve the photothetic potential in milk stage, and benefit the form of yield.更多还原