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西瓜雌花开放后,子房不能迅速膨大,2～3天后开始萎缩黄化以至烂掉,这种现象称为化瓜。 一、西瓜化瓜的原因 西瓜化瓜的原因很多,主要有以下几个方面:一是授粉困难。西瓜为雌雄同株异花作物,如花期遇阴雨天,花粉吸湿破裂,或保护地栽培花期提前,昆虫少,雌花不能正常授粉,使子房不能膨大生长而脱落。二是雌花或雄花发育不正常,如柱头过短,无蜜腺,花药中无花粉或雌蕊退化等,都会引起化瓜。三是西瓜生长过盛或过弱。由于植株
Watermelon female flowers open, the ovary can not be swollen quickly, 2 to 3 days after the beginning of shrinking yellow and even rotten, this phenomenon is called melon. First, the reasons for watermelon melon Watermelon melon for many reasons, mainly in the following areas: First, pollination difficulties. Watermelon is hermaphrodite different flowering crops, such as when the flowering cloudy, pollen hygroscopic rupture, or protected planting flowering ahead of time, less insects, female flowers can not be pollination, so that the ovary can not enlarge growth and fall off. Second, the female flower or male flower is not normal, such as stigma is too short, no nectary, anther pollen or pistil degradation, will cause melon. Third, watermelon growth over or under the weak. Due to plant