Effect of Cultivation Factors on the Yield and Quality of North Japonica Rice 12th Report: Effect of Nitrogen Fertilizer Amount on the Yield and Quality of Rice

The experimental results in three years showed that nitrogen fertilizer was helpful to increase plant height,effective tillers,grains per panicle and leaf ages,but lowered grain plumpness and 1000-grain weight.However,the trend was not different significantly when the nitrogen amount reached 110 kg/hm2.The yield reached the highest when the nitrogen amount was 140 kg/hm2 and the returns were the highest when the nitrogen amount was 110 kg/hm2.With the increase of nitrogen fertilizer,the milling quality,appearance quality and eating quality decreased.