Abstract: Effect of temperature and humidity combination on flowering habits and activity of enzyme in spikelets were studied using Zhenshan 97A (cytoplasmic male sterile line) and Ce 64-7(restorer line) as materials. Temperature and humidity ratio affected differently flowering habits of cytoplasmic male sterile line and restorer line. A quadratic regression could be used to describe the relationship between index of blooming time synchronization (IBTS) and temperature and humidity ratio. There was a optimum temperature and humidity ratio at flowering stage (40 for Shanyou 64). Activity of enzyme (peroxidase, catalase) in spikelets was differently influenced by temperature under different humidity.

Key words: hybrid rice, seed production, temperature, humidity, flowering habit, enzyme activity

摘要： 杂交水稻； 制种； 温度； 湿度； 开花习性； 酶活性以珍汕97A、测64-7为材料，研究了杂交稻制种扬花期温湿互作配比对开花及颖花酶活的影响，结果显示温湿度对父母本开花的影响不同。花时同步指数与温湿配比之间存在着二次抛物线回归关系。花时相遇状况与温湿配比有关，在扬花期存在一个最适温湿互作配比(汕优64为40)。过氧化物酶、过氧化氢酶活性在不同湿度下受温度的影响不同。

关键词: 杂交水稻, 制种, 温度, 湿度, 开花习性