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多品种、多年、多播期分段抽样试验结果表明：稻米直链淀粉含量形成动态变化过程可用三次曲线方程进行模拟；从模拟方程的相关参数分析说明，稻米直线淀粉含量的有效积累天数与品种结实期持续的时间（天数）有关，结实期持续时间长的品种其有效积累天数长；齐穗后２０ｄ内这一时段是稻米直链淀粉含量形成的主要时段；稻米直链淀粉含量与齐穗后２０ｄ内温度的关系可分为４种类型：（１）正相关反应型；（２）负相关反应型；（３）二次曲线反应型；（４）对温度反应不敏感型．
The results of multistage, multi-year and multi-sowing stages showed that the dynamics of amylose content in rice could be simulated by cubic curve equation. The analysis of relevant parameters of simulation equation showed that the effective accumulation days and varieties (Days), and the effective accumulation period was longer in the varieties with long duration of fruit setting; the duration of amylose content in rice within 20 days after heading was the main period; the content of amylose in rice with full heading The relationship between temperature in the last 20 days can be divided into four types: (1) positive correlation type; (2) negative correlation type; (3) quadratic curve type; and (4) insensitive to temperature.