Machinetransplanted rice was chose as study material to compare the effects of three fertilization treatments on rice yield formation from the perspectives of source，translocation and sink.In the three fertilization treatments，chemical fertilizer and two organicinorganic mixed fertilizers were applied.For treatment 1(Tr1)，chemical fertilizer was applied by three times as basal，tillering and panicle fertilizations respectively.In treatment 2(Tr2)，organicinorganic mixed fertilizer was applied twice as basal and panicle fertilization，and the organicinorganic mixed fertilizer was applied for three times as basal，promoting flower and saving flowering fertilization respectively for treatment 3(Tr3).The results showed two kinds of organicinorganic mixed fertilization treatments，especially for Tr3，could not only enhance the SPAD values in top second and third leaves of canopy 20 days after flower but also significant increased leaf area of three top leaves compared with chemical fertilization treatment.In addition，organicinorganic mixed fertilization inhibited accumulation of dry matter before flower，but made it increased faster after flower.However，all the three fertilization treatments attained similar level of dry matter accumulations at mature stage.Compared with Tr2，thousand kernel weight in Tr3 and Tr4 was lower but their actual grain amount was increased greatly.The yield in Tr4 was the highest，which was 7.5% and 6.0% higher than Tr3 and Tr2.It is concluded that organicinorganic mixed fertilizers with twice application during whole rice growth stage could substitute threefertilization of chemical fertilization.In addition，panicle fertilization divided into promoting flower fertilization and saving flower fertilization shall significantly increase rice grain yield.