Effect of postponing nitrogen fertilizer application on yield and nitrogen using efficiency of super rice Yangliangyou6

Under the condition of the same soil fertility and amount of nitrogen fertilizer,the effects of different ratios of nitrogen basic-tiller and panicle fertilizer application on the super rice Yangliangyou6 yield and nitrogen using efficiency were studied.The results showed that proper postponing nitrogen fertilizer application could improve rice yield and nitrogen using efficiency,the order of the grain yield from high to low for five treatments was 6:45:57:310:0CK;the nitrogen agronomic efficiency was 6:45:57:310:0;and the nitrogen apparent recovery efficiency was 6:47:35:510:0,suggesting that too high or too low ratio of nitrogen basic-tiller and panicle fertilizer application was unfavourable for high yield and nitrogen using efficiency,6:4 was the best,and several fertilizer applications were better than one time application.