西瓜生长喜欢高温、干燥环境和充足的光照,特别是在开花坐果期和果实发育期对温度、湿度、尤其对光照要求更为严格。西瓜坐瓜期(坐瓜节位雌花开花到果实退毛)开花结果这段时间在25～35℃适宜的条件下需4～6d,否则坐瓜将引起化瓜。为提高西瓜坐果率,减少空秧率,应采取以下措施: Watermelon growth like high temperature, dry environment and adequate lighting, especially in flowering and fruit development and fruit development on the temperature, humidity, especially for lighting more stringent requirements. Watermelon sit melon period (sitting melon node female flower blooming to the fruit back hair) flowering results this time at 25 ~ 35 ℃ under the appropriate conditions to be 4 ~ 6d, or sitting melon will cause melon. To improve the watermelon fruit setting rate and reduce the empty seedling rate, should take the following measures: