留叶枝显著提高了棉花营养器官的干物质积累总量 ,扩大了光合面积 ,有利于光合产物的积累。叶枝对棉花群体生物量也是一个有益的补偿 ,可有效提高生殖器官的干物质积累总量。试验结果显示 ,留叶枝处理的棉花地上部干物质积累量显著提高 ,1996年、1997年分别比对照 (去叶枝 )提高 19 63%和 16 32 % ,表明 ,在一定的肥水条件下 ,棉花叶枝不仅是一个消耗营养的器官 ,也是一个制造营养的器官。合理利用叶枝 ,是棉花高产高效简化栽培的重要途径 Leaf retention significantly increased the total dry matter accumulation in vegetative organs of cotton and expanded the photosynthetic area, which was beneficial to the accumulation of photosynthate. Leafy branches are also a useful compensation for the biomass of cotton and can effectively increase the total dry matter accumulation of reproductive organs. The results showed that the dry matter accumulation of above-ground shoots was significantly increased after the leaf-leaved branches were treated, which increased by 19 63% and 16 32% respectively compared with the control (de-leaf branches) in 1996 and 1997, indicating that under certain fertilizer and water conditions, Not only is a nutrient-consuming organ, but also a vegetative organ. The rational use of leafy branches is an important way for high-yield, high-efficiency and simplified cotton cultivation