我区农业局科技人员,在长期的生产实践中总结出了一套预防地膜西瓜后期早衰的方法献给大家,供瓜农参考。1.及时补肥西瓜长到鸡蛋大时,667米施尿素40千克,磷酸二氢钾52千克,以水送肥。以后可根据植株长势,再追肥次或喷叶面肥12～3次,可选用尿素与磷酸二氢钾的混合液或喷施宝、叶 Science and technology personnel in our district Agricultural Bureau, in the long-term production practice summed up a set of methods to prevent post-mortem plastic film watermelon for everyone, for melons reference. 1. Timely fertilizer Watermelon grow eggs, 667 meters Shi urea 40 kg, potassium dihydrogen phosphate 52 kg, water to the fat. Later, according to plant growth, and then top-dressing or spraying foliar fertilizer 12 to 3 times, the choice of urea and potassium dihydrogen phosphate mixture or spray Po, leaves