论文部分内容阅读
1.温湿度管理1.1温度管理当自然界夜间最低气温降到15～18℃时,就要扣盖棚膜,此时西瓜多数已进入开花结果期。这时需要保持白天28～30℃,夜间16～18℃,超过31℃时要及时通风。坐瓜后昼夜温差保持15℃左右,最有利于西瓜的碳水化合物的形成和积累。1.2湿度管理西瓜茎叶生长要求空
1. Temperature and humidity management 1.1 Temperature Management When the natural night minimum temperature dropped to 15 ~ 18 ℃, it is necessary to deduct the cover film, then most of the watermelon has entered the flowering period. At this time need to maintain during the day 28 ~ 30 ℃, night 16 ~ 18 ℃, more than 31 ℃ should be timely ventilation. After sitting melon temperature difference between day and night to maintain about 15 ℃, the most conducive to the formation and accumulation of watermelon carbohydrates. 1.2 Humidity Management Watermelon stem and leaf growth requirements of empty