Study on effect of various free-plowing and throwing super-rice seedling fertilization technique

There was some effect of different technique of fertilization on the super rice yield of no-tillage cast-transplanted culture.Application tiller fertilizer to early super rice would boost the branches too much because too large of the ratio of tiller fertilization at prophase.Effective panicle reduced because of the under nutrition in middle and later stage of growth of rice,which would influence the yield of super rice.Good and enough panicle fertilizer could promote reproductive growth and be favorable to formation and accumulation of carbohydrate,increase the effective panicle,grain number per panicle,spike seed rate and yield.Late rice should be emphasized on the application of spike fertilizer when the optimum application of tiller fertilizer,because of the high temperature and fast nutrient release.On the basis of phosphate fertilizer as base fertilizer,for early rice,the highest yield and benefit occurred in the treatment of base fertilizer 60% and panicle fertilizer 40%,for late rice,the highest yield and benefit occurred in the treatment of base fertilizer 60%,tiller fertilizer 20% and panicle fertilizer 20%.Both early and late rice with the treatment of base fertilizer 60% and tiller fertilizer 40% got the lowest yield.