瓜类的花芽分化，是在夜间温度低和昼间强光照的条件下进行。此时体内碳水化合物积蓄多，如再充分地施用氮、磷等肥料，使体内的氮素化合物增多，则花器官分化、发育旺盛，易形成大型的花。氮素营养增多，有利于雌花形成；钾素营养有利于雄花形成。利用二氧化碳处理，有利于黄 Melon flower bud differentiation is at night under the conditions of low temperature and daylight illumination. At this point more than the accumulation of carbohydrates in the body, such as the full use of nitrogen, phosphorus and other fertilizers, so that the body’s nitrogen compounds increased, the flower organs differentiation, vigorous development, easy to form large flowers. Nitrogen nutrition increased, is conducive to the formation of female flowers; potassium nutrition is conducive to the formation of male flowers. Use of carbon dioxide treatment, is conducive to yellow