一、不宜单独施用氮肥单独施用氮素化肥，容易造成蔓叶徒长，影响坐果率，减少结瓜数，降低甜度。要注意氮磷钾肥配合施用，多施有机肥，如鸡鸭鹅粪、饼肥和草木灰等。二、不宜干旱时施浓肥土壤干旱时，施浓肥会使根系细胞质水溶液向外渗透，引起细胞质壁分离，导致西瓜蔓叶生 First, it is not appropriate to apply nitrogen fertilizer alone Nitrogen fertilizer alone, likely to cause vine leaves only affect the rate of fruit set, reduce the number of knot, reduce the sweetness. Should pay attention to the application of nitrogen, phosphorus and potassium fertilizer, more organic fertilizer, such as chickens and goose droppings, cake and grass ash and so on. Second, it is not suitable for drought when applying fertilizers Soil drought, the application of fertilizers will make the roots of aqueous cytoplasm infiltration, resulting in the separation of the cytoplasmic wall, resulting in watermelon vine leaves