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温室内黄瓜栽培密度过大,氮肥过多,湿度大,温度高,特别是夜温高,昼夜温差小,容易造成营养生长过旺,只长枝叶难结瓜。防治方法:①合理密植。温室黄瓜应适当稀植。加强肥水管理,培育壮苗。采用大小行栽培,小行距不小于50厘米,大行距不小于100厘米,每667平方米栽3700～4000株。②适当追肥。
Greenhouse cucumber cultivation density is too large, too much nitrogen, humidity, high temperature, especially the night temperature, temperature difference between day and night is small, likely to cause vegetative growth over Wang, only the long branches difficult to cure. Prevention and treatment methods: ① reasonable close planting. Greenhouse cucumber should be sparsely planted. Strengthen fertilizer and water management, cultivate strong seedlings. Small and medium-sized cultivation, small row spacing of not less than 50 cm, large row spacing of not less than 100 cm, planting 3700 ~ 4000 plants per 667 square meters. ② appropriate top dressing.