大棚栽培瓜类蔬菜幼瓜自行萎蔫,不长大自行干枯的现象称化瓜。现将化瓜的主要原因和防治措施介绍如下。1　瓜类蔬菜化瓜的主要原因栽植密度过大,营养不良　不合理密植,根系间互相争夺养分。地上植株茎叶间互相争夺空间和光照,造成植株个体养分不足,通风透光性能差,光合作用效能 Greenhouse cultivation melon vegetables gardening their own wilting, do not grow self-drying phenomenon called melon. Now the main reason for melon and prevention measures are described below. A melon vegetable melon main reason planting density is too large, malnutrition unreasonable close planting, mutual competition for root nutrients. Plants and leaves on the ground fight for space between each other and light, resulting in plant individual nutrient deficiency, poor ventilation and light performance, photosynthesis efficiency