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通过田间试验,研究了3个氮肥水平下(0、150、300千克/公顷)江淮粳稻(镇稻88、南粳44)主要稻米品质指标和精米中主要矿质元素含量的变化。结果表明,氮肥用量对稻米主要品质指标和矿质元素含量的影响显著,两个品种的变化趋势基本一致。随着氮肥用量的增加,水稻的出糙率、精米率、整精米率、垩白大小、垩白米率、垩白度均呈现下降趋势,但米粒的长宽比升高,外观品质改善的效应高于加工品质的下降效应,且在高氮水平下,整精米率、垩白米率显著下降,长宽比显著增加。子粒中直链淀粉含量随氮肥用量的
Field experiments were conducted to study the main rice quality indicators and the changes of major mineral elements in polished rice at three levels of nitrogenous fertilizer (0,150,300 kg / ha) of Jianghuai japonica rice (Zhenjiang 88 and Nanjing 44). The results showed that the amount of nitrogen fertilizer had significant effect on the main quality index and mineral element content of rice, and the trend of change of the two varieties was basically the same. With the increase of nitrogen application rate, the browning rate, milled rice rate, milled rice rate, chalky size, chalky rice rate and chalkiness degree of rice all showed a downward trend, but the aspect ratio of rice grain increased, the effect of improving the appearance quality Which is higher than the decline effect of processing quality. Under the high nitrogen level, the rate of milled rice and chalky rice declined significantly and the aspect ratio increased significantly. The amylose content in the grain varies with the amount of nitrogen fertilizer applied