早春的塑料拱棚西葫芦在结果初期化瓜严重,影响西葫芦的早期产量和经济效益。化瓜原因:一是营养不良,水肥跟不上,土壤贫瘠,植株生长弱。二是夜间温度过高,造成茎叶徒长,抑制生殖生长。三是过早浇水,偏施氮肥,在第一个瓜未座住时就大水大肥,造成营养生长过旺。四是第一个瓜采摘不及时,造成坠秧,影响上位果实生长发育。五是生殖生长过程,造成花打顶,出现化瓜。六是授粉不正常,早春低温,西葫芦雌花分化多,雄花少,造成花粉源少,加上西葫芦是虫媒花,早春传粉昆虫少,不能 Early spring plastic arch zucchini in the early results of melon serious impact on the early yield and economic benefits of zucchini. Melon reasons: First, malnutrition, water and fertilizer keep up, poor soil, plant growth is weak. Second, the night temperature is too high, resulting in stems and leggy growth, inhibit reproductive growth. Third, premature watering, partial application of nitrogen fertilizer, water and fat in the first melon did not seat, resulting in vegetative growth over. Fourth, the first melon picking not timely, resulting in seedlings fall, affecting the growth and development of the host fruit. Fifth, reproductive growth process, resulting in flowers topping, there melon. Sixth, pollination is not normal, low temperature in early spring, zucchini female flower differentiation, less male flowers, resulting in less pollen, coupled with zucchini is insect-type flowers, early spring pollinators less, can not