棉花花铃期正值棉株增蕾保铃、增铃重、增衣分的重要时期,亦是棉花经济产量形成的时期,所以,抓好棉花中后期管理,对于夺取棉花丰收有着重要的意义。本阶段应以养根保叶,早熟优质为中心,辅之以相应措施。养根。根在棉花的生命活动中,具有十分重要的生理作用。它是棉花吸收水肥,合成地上部生长所必需的营养物质的重要器 The cotton boll period is at an important period for cotton bolls to increase bollard boll, boll weigher and add garments, which is also the period for the economic yield of cotton. Therefore, it is of great significance to seize the cotton mid- and late-stage management to seize the cotton harvest . This stage should be to protect the leaves, early maturity of quality as the center, supplemented by the corresponding measures. Yang root. Root in the life activities of cotton, has a very important physiological role. It is an important device for cotton to absorb water, fertilizer and nutrients necessary for the growth of aerial shoots