西瓜甜度的大小,与其整个生育期,特别是与后期土壤中磷、钾肥含量相关。因为植物体内糖的合成、转化和运输,都与磷、钾元素有着密切的关系。特别是在生殖生长阶段,光合作用形成的碳水化合物,只有在磷钾的参与下,才能被运输到生殖器官,变成储存物质。所以,在西瓜的生长过程中,不管施用哪种肥料,只要氮磷钾搭配适当,合理施用,就会增加西 Watermelon sweetness of the size, and its entire growth period, especially with the late soil phosphorus and potassium content. Because the synthesis of sugar in plants, transformation and transport, with phosphorus and potassium are closely related. Especially during the reproductive growth phase, carbohydrates formed by photosynthesis can only be transported to the reproductive organs and become stored substances with the involvement of phosphorus and potassium. Therefore, in the process of watermelon growth, no matter what kind of fertilizer, as long as NPK with proper and reasonable application, it will increase the West