论文部分内容阅读
在大田不同施氮条件下,研究了3个水稻品种的氮素吸收利用效率及其对产量和品质的影响。结果表明,施氮量增加,水稻氮素积累总量增加,而氮素的生产效率和收获指数下降。相同施氮量条件下提高穗肥比率,氮素积累量及其回收效率和运转效率增加,而氮素生产效率下降。不同施氮条件下水稻氮素吸收利用效率的变化对产量和品质性状产生重要影响,稻米蛋白质含量随氮素积累量增加而显著增加,随氮素生产效率提高而极显著下降;垩白米率及面积随氮素收获指数增加而显著提高。穗数随氮素积累量增加而显著增加,随氮素收获指数和氮素生产效率增加而显著下降;结实率随氮素生产效率增加而极显著提高,随氮素积累量增加而显著下降。
Under the different nitrogen application conditions in the field, the nitrogen absorption and utilization efficiency of three rice cultivars and their effects on yield and quality were studied. The results showed that nitrogen application increased the total nitrogen accumulation in rice increased, while the nitrogen production efficiency and harvest index decreased. Under the same amount of nitrogen application, increasing the ratio of panicle to panicle, the amount of nitrogen accumulation, the recovery efficiency and operational efficiency increased, while the nitrogen production efficiency decreased. The nitrogen use efficiency of rice under different nitrogen application conditions had a significant impact on the yield and quality traits. The protein content of rice increased significantly with the increase of nitrogen accumulation, but significantly decreased with the increase of nitrogen production efficiency. The chalkiness rice rate and The area increased significantly with the increase of nitrogen harvest index. The spikes increased significantly with the increase of nitrogen accumulation, but decreased with the increase of nitrogen harvest index and nitrogen production efficiency. The seed setting rate increased significantly with the increase of nitrogen production efficiency and decreased significantly with the increase of nitrogen accumulation.