鲁西南地区棉花大约4月底至5月初出苗,到6月上、中旬进入蕾期,历时40d左右。此阶段常受低温寒冷等不利天气因素的影响,易造成出苗不齐、缺苗断垄或弱苗晚发等现象。因此,此期管理的主攻目标是以促为主,促控结合,确保苗齐、苗匀,实现壮苗早发。具体措施如下: Cotton in the southwest of Shandong Province emerges from the end of April to the beginning of May and enters the bud stage in June and mid-June, which takes about 40 days. This stage often affected by unfavorable weather factors such as cold and cold, easily lead to emergence of missing, lack of seedling broken ridge or late emergence of weak and other phenomena. Therefore, the current management of the main goal is to promote the main, promoting control combined to ensure Miao Qi, Miao uniform, early seedlings to achieve strong. Specific measures are as follows: