江西省农科院作物所土肥系,为了解决水稻丰产栽培中存在的“四多四少”现象(肥料用得多,利用率少;分蘖多,有效分蘖少;总苗较多,穗数少;枝梗颖花退化和空壳多,结实率少),更好地发挥现有肥料的增产效益,去年采取攻中、顾两头的“山”字形施肥法,取得良好效果。“山”字形施肥法,就是按一般施肥水平施用有机肥作基肥,适量少施面肥和蘖肥,重施、巧施穗肥,补施粒肥,以确保幼穗分化和抽穗后同化器官对氮素的需要,防 Jiangxi Academy of Agricultural Sciences Crops Department of soil and fertilizer, in order to solve the high-yield cultivation of rice in the existence of “four more and four less” phenomenon (fertilizer used more, less utilization; tillers and more effective tillers less; ; Spikelets spike flowers degeneration and shell and more, less fruitful), to give full play to the benefits of existing fertilizers increase production last year to take attack, care two “mountain” shape fertilization method, and achieved good results. “Mountain” shape fertilization method, that is, according to the general level of fertilizer application of organic manure as a base fertilizer, the amount of fertilizer and tillering less applied, re-Shi, Qiao Suifen, fill fertilizer to ensure spikelet differentiation and heading of assimilation of nitrogen Prime need, anti