不少农工在实践中发现：红薯摘心可提高产量 10％以上。这是因为红薯摘心后能控制红薯茎蔓的伸长，促进基部分枝的形成与生长，使分枝和绿叶数增加。 　　具体方法是：红薯蔓长到 50厘米左右时将其顶端 3厘米的部分摘除，促进基部产生分枝及其生长，待分枝长到 50厘米长时摘除 Many agricultural workers found in practice: sweet potato topping can increase production more than 10%. This is because the sweet potato inpping can control the elongation of the sweet potato stems and promote the formation and growth of the base branch, so that the number of branches and green leaves increased. The specific method is: when sweet potato grows to about 50 centimeters when its top 3 cm part removed, to promote the production of the base of the branches and their growth until the branches grow to 50 cm long removed