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以66个贵州水稻地方品种为材料,进行自然日照和人工短日(不同播期)处理的结果:水稻品种感光性弱—中、感温性弱、中强均有,短日高温生育期长。由于贵州低纬度高海拔的地理因素,稻作垂直分布显著,水稻生态类型多种,加上种植季节性不同,水稻光温反应型差异大。水稻出穗日数与感光性、短日高温生育期相关性显著。
Sixty-six rice landraces from Guizhou were used to study the effects of natural sunlight and artificial short days (different sowing dates). The results showed that the rice cultivars were sensitive to light, moderate to moderately warm, moderately strong and short to high temperature . Due to the geographical factors of low latitude and high altitude in Guizhou, the vertical distribution of rice is significant. There are many ecological types of rice, and the seasonality of planting is different. There was a significant correlation between the heading date and the sensitivities of rice and the short-term and high-temperature growth period.