In order to explore the residual effect of 15N-labeled urea in paddy soil under the conditions of organic and inorganic application，a pot experiment was conducted on brown paddy soil in the northeast of China and the proper fertilization methods were selected by combining the supply of soil nitrogen and the uptake of fertilizer nitrogen by rice. Seven treatments were setup: control(CK)，urea(N)，straw+urea(NS)，pig manure+urea(NM)，stabilized urea(NI)，straw+stabilized urea(NIS)and pig manure+stabilized urea(NIM).The results showed that the addition of stabilized urea，straw and pig manure changed the soil conversion and rice uptake of 15N labeled urea.Compared with N，NI significantly delayed the urea hydrolysis(P<0.05)，and increased the supply of NH4+-N at rice seedling and tillering stages，thus improving rice biomass and yield at whole growth stage，so was the rice yield and nitrogen recovery efficiency. The addition of straw and organic fertilizer significantly increased the soil microbial biomass carbon or nitrogen，enhanced the ability of nitrogen supply.NS or NIS increased the uptake and utilization of fertilizer nitrogen in panicle and above-ground biomass，which represent the highest harvest index(0.39～0.47).NIM increased rice yield by 137% compared with N，which also improved the rice biomass at tillering and maturation stage by 1.98% and 53%， respectively and improved nitrogen recovery rate，which was about 1.82 times that of N.The microbial biomass carbon and nitrogen of straw combined with nitrogen fertilizer had better coupling and the increase effect of pig manure was more obvious.In conclusion，in the paddy field soil in northern my country，from the perspective of yield and biomass in season，NI and NIM are recommended as fertilization patterns，NS and NIS are worthy of long-term exploration from the perspective of fertilizer nitrogen fixation and soil cultivation.