打顶又叫“摘心”,这是一项简单易行的农作物增产措施。农作物适时适度地打顶,能调整株型、协调养分分配、提高产量和品质。黄瓜、甜瓜、西瓜、苦瓜、南瓜、冬瓜等瓜菜作物,在蔓长到20～30厘米时,进行摘心和剪去中上部的分枝与赘芽,使养分集中地输送到幼果中去,可使其提早结果上市。四季豆、 Topping, also known as “topping,” is a simple and easy crop yield increase. Appropriate timely modest crop topping, can adjust the plant type, coordinate the distribution of nutrients, improve yield and quality. Cucumber, melon, watermelon, bitter gourd, pumpkin, melon and other melons and vegetables, when the vine grows to 20 to 30 cm, topping and cutting the middle of the branches and buds, the nutrient concentration of delivery to the young fruit go , Can make its early results listed. Green beans,