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一、坐果不良的原因 1、没有完成授粉、受精。哈密瓜属雌雄异花,靠虫传媒。花,开花 期遇到低温、高温、阴雨等不利条件,就会影响正常授粉受精,果实膨大较慢,网纹差,引起畸型瓜。 2、光照。哈密瓜生长喜高温和充足的光照,生育期最少要有1300～1500小时以上的日照,才能正常生长。或出现低温光照不足,会造成发育不良,植株生长势弱。 3、水分不足。开花结果期,水分不足引起雌花子房发育受阻,也会影响坐瓜。果实膨大期,要求果实内水分达到95％以上,才能正常发育。 4、氮肥偏多。开花结果期,氮肥偏多,会引起营养生长过旺、生殖生长受到抑制,茎叶生长消耗大量养分,花果养分相对减少,幼瓜会因营养不足而脱落。 5、密度过大。导致光照不足,通风不良,影响坐瓜。
First, the reasons for poor fruit 1, did not finish pollination, fertilization. Hami melons are dioecious, by insects media. Flowers, flowering encountered low temperature, high temperature, rain and other adverse conditions, it will affect the normal pollination and fertilization, fruit enlargement slower, bad textured, causing abnormal melon. 2, light. Hami melon growth like high temperature and adequate light, the growth period of at least 1300 ~ 1500 hours of sunshine, in order to normal growth. Or appear low temperature light, will cause poor growth, plant growth potential weak. 3, lack of water. Flowering period, water shortage caused by the development of female flower obstruction, will also affect the sitting melon. Fruit expansion period, requiring more than 95% of the water within the fruit, in order to normal development. 4, more nitrogen fertilizer. Flowering period, nitrogen fertilizer too much, will lead to overgrown vegetative growth, reproductive growth is inhibited, stem and leaf growth consume a large amount of nutrients, relative decrease in flower nutrition, cucumber will fall off due to lack of nutrition. 5, the density is too large. Lead to inadequate lighting, poor ventilation, affecting sitting melon.