Abstract:In order to investigate the effect of the combined application of N and Zn fertilizers on the growth,yield,nutrient absorption and distribution of rice,the indica hybrid rice variety Guangliangyou 35 and conventional japonica rice cultivar Nipponbare were treated with combined application of three Zn levels and four N levels in field experiment. We analyzed the shoot dry weight at different growth stages,the yield and its components at mature stage as well as the concentrations,accumulations and distributions of N and Zn in different organs and tissues. Results showed that the combined application of N and Zn fertilizers had synergistic effect on the rice biomass at the early growth stage and the yield at the mature stage. The combined application of N and Zn fertilizers had significant synergistic effect on rice panicle numbers. The significantly increased panicle numbers determined the increase of yield under the combined application of N and Zn fertilizers. The combined application of N and Zn fertilizers increased the concentrations of N and Zn in rice plant,and promoted the distribution of N and Zn to the reproductive organ (spikelet),which is one of the main physiological mechanisms of increasing yield under the combined application of N and Zn fertilizers.