山药从清明前后种植到茎蔓爬满架(即从4月初到6月中下旬),这一时期的管理相对简单。到了7月,山药进入了旺盛生长期,这个时期是山药地上和地下同时进行生长的关键时期,地下块茎开始快速伸长、膨大,由于此时正值高温多雨季节,往往引起病虫害的高发。由间积水、叶片发黄、早衰等现象频发,严重影响山药的产量和品质。针对 The cultivation of yam from before and after Qingming to full stems and vines (from early April to late June), the management of this period is relatively simple. In July, yam entered a period of vigorous growth, this period is the key period for yam to grow at the same time on the ground and underground. The underground tubers began to expand rapidly and swollen. Because of the high temperature and the rainy season at this time, they often cause the high incidence of pests and diseases. By the intermittent water, leaves yellow, premature aging and other frequent, seriously affecting the yield and quality of yam. against