在农业学大寨、普及大寨县群众运动蓬勃开展的大好形势下,为了充分发挥现有肥料的增产效益,摸索水稻省肥高产的门路,解决水稻高产栽培中出现的“蔸大尾小”“好禾无好谷”的问题,我们从1975年开始,在总结群众经验基础上,根据水稻在幼穗分化至抽穗期的吸肥量相当全生育期需肥量二分之一这一特点,采取攻中顾两头的“山”字 In order to give full play to the yield-increasing benefits of existing fertilizers and to find ways to increase the yield of fertilizers in agriculture under the great situation of popularizing Dazhai in agriculture and popularizing mass movements in Dazhai County, “Good Wo no good valley” issue, we start in 1975, based on the experience of the masses, based on rice in young panicle to heading a considerable amount of fertilizer required during the whole growth period of the required amount of fat this feature , Take attack in the care of two “mountain” word