一、西瓜僵苗的原因 (一)雨天栽苗或栽后遇长时间的低温阴雨,土壤板结,通气不良,根系发育受阻。 (二)基肥施得过多,追肥未及时跟上,从而造成瓜苗营养缺乏。 (三)基肥未经充分腐熟或追肥施得过浓,使西瓜根苗灼伤。 (四)病虫危害,如根系虫病、潜叶蝇、蚜虫等危害瓜苗根、叶,造成瓜或者根系发育不良,植株叶片发黄。 First, the reasons for watermelon stiff seedlings (A) rainy planted or planted after a long time cold rainy, soil compaction, poor ventilation, root development is blocked. (B) excessive base fertilizer, dressing not timely to keep up, resulting in lack of nutrition melon seedlings. (C) Basal fertilizer without adequate maturity or topdressing too thick, so watermelon root seedlings burns. (D) pests and diseases, such as root worm disease, leaf miner, aphids and other detrimental melon root, leaves, resulting in melon or root dysplasia, plant leaves yellow.