寒地水稻种子吸水发芽与温度的关系

The Relationship Between Water Absorption, Germination of Rice Seeds and Temperature in Cold Region

利用生长曲线模型，根据９个水稻品种在不同温度下的吸水及发芽状况确立了它们的临界下限温度、５０％发芽所需有效积温和活动积温。结果表明哈３５０１３的临界下限温度和５０％发芽所需有效积温均低，故耐芽期低温能力较强。同时还阐述了不同温度下种子吸水过程的时间函数。

According to the situation of water absorption and germination of 9 rice cultivars (lines) under different temperature regimes, we set up their threshold low temperature and effective accumulated temperature required for 50 percent seeds germination by using growth curve model. The results showed that the threshold low temperature and effective accamulated temperature for 50 percent seeds germination of H35013 were lower. So its low teperature tolerance is stronger at sprout stage. At the same time, the time function of water absorption procedure was mentioned at different temperature regimes.