根外追肥是作物生育后期采用的一种辅助性施肥措施,可以延长作物叶片的寿命,加强叶片的光合作用,有利于碳水化合物的形成和积累,减少空秕粒,提高粒重有明显的效果。 我们在17.6亩稻田进行喷施化肥和喷施清水试验,在水稻孕穗,灌浆期分两次进行。结果在同等土壤肥力和一样的管理水平 Root top dressing is an adjuvant fertilization measure applied late in crop growth, which can prolong the life of crop leaves and enhance the photosynthesis of leaves, which is good for the formation and accumulation of carbohydrates, reducing the empty grains and improving the grain weight. . In 17.6 acres of paddy fields we sprayed fertilizers and sprayed water experiments, booting in rice, filling two times. Results at the same soil fertility and same management level