甘薯从茎叶封垄到茎叶生长高峰为生长中期,从茎叶开始衰败到收获为生长后期,统称为甘薯生长的中后期。这个时期是甘薯生长的关键时期,适时加强田间管理,对夺取甘薯高产具有重要意义。根据我县多年的实践经验,应抓好“两改、一追、一喷”四项措施。 Sweet potato stems and leaves from the ridge to the peak growth stems and leaves for the growth of medium-term, from the decline of stems and leaves to harvest for the late growth, collectively referred to as the growth of sweet potato in the late. This period is a critical period for the growth of sweet potato. It is of great significance to intensify the management of field and seize the high yield of sweet potato. According to my county’s many years of practical experience, we should grasp the “two changes, a chase, a spray” four measures.