The new high-quality and delicious japonica rice variety Tai'an 1 as the research material,seven nitrogen application levels treat-ments were set up,which were 0 kg/hm2(CK),135 kg/hm2(N1),180 kg/hm2(N2),225 kg/hm2(N3),270 kg/hm2(N4),315 kg/hm2(N5)and 360 kg/hm2(N6)respectively,to study the effects of different nitrogen application rates on the yield and quality of Tai＇an 1.The experi-mental results showed that within a certain range,the yield showed a trend of first increasing and then decreasing with the increase of nitrogen application,and the highest performance observed in the treatment of 315 kg/hm2.In terms of rice quality,as the amount of nitrogen fertilizer increase,the brown rice rate,milled rice rate,and whole milled rice rate increase,and the milling quality gradually improved.The chalkiness de-gree and chalky grain rate significantly increased with the increase of nitrogen application,while the appearance quality decreased;the protein content showed an increasing trend with the increase of nitrogen application,while the changes in amylose content and gel consistency with ni-trogen application were not significant.Under the conditions of this experiment,the yield and quality of Tai'an 1 could be coordinated when the nitrogen application level ranges from 270 to 315 kg/hm2.
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