【摘要】 通过对9个水稻品种、3个播期连续4年灌浆结实期中，稻米粒重和13个单一品质性状的观察分析表明，稻米综合品质在齐穗后先有一个近乎线性的快速增长期，30d以后品质变化（品种和播期间稍有差异）趋于稳定，用二次或三次回归曲线模拟效果最好，综合品质与粒重的变化有极显著或显著正相关关系。更多还原

【Abstract】 On the basic of field experiments in 4 years with 9 rice varieties and 3 sowing dates, the rice kernel weight and 13 single quality characters were investigated and analysed during the ripening of rice kernel in this pa per. There were two stages in the development of synthetic quality of rice kernel, the first stage looked likel linear increasing, and it increased to maximum at 30 days after full heading and thereafter, remained almost constant (some difference among varieties and sowing dates). There were the marked relation between the synthetic quality of rice kernel changing and kernel weight changing.更多还原