豫北地区棉花一般在8月下旬开始吐絮,10月底收花基本结束,约70天左右。此阶段田间管理的主攻方向是促早熟、防早衰和贪青晚熟。管理上要做到保根、保叶、保铃,增铃重,增衣分,促早熟,加快吐絮,确保优质、丰产、丰收。主要管理措施如下:1.灌好吐絮水吐絮期虽需水量不大,但保证适 Cotton in northern Henan generally began to vomit the floc in late August, and the end of October was basically closed, about 70 days. Field management at this stage the main direction is to promote premature aging, premature senility and late greyness. To ensure that the management of Paul root, Paul leaves, Paul bell, boll weight, add clothing points, and promote early maturity, speeding Tuisu, to ensure high quality, high yield, good harvest. The main management practices are as follows: 1.