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通过培养试验和田间定位试验证明，施用化学肥料可极显著地提高水稻植株各部位生物学产量，增加水稻残留于土壤中的根茬数量。一般稻谷产量在５０００～７５００ｋｇ／ｈｍ２条件下，其根茬数量达１８２６～２８５９ｋｇ／ｈｍ２。在北方寒冷稻作区，水田耕层土壤有机质具有保持稳定或略增加的趋势
Through the cultivation experiment and the field experiment, it was proved that the chemical fertilizers could significantly increase the biological yield of various parts of rice plants and increase the number of stubble remaining in the soil. General paddy output in the 5000 ~ 7500kg / hm2 conditions, the number of stubble up to 1826 ~ 2859kg / hm2. In the northern cold paddy cropland, the soil organic matter in paddy topsoil has the tendency to maintain or slightly increase