Abstract:

Based on the data of daily average temperatures, precipitation and sunshine duration in rice growth period during the past 35 years（1980-2014） in Xinyang City, calculated the climate suitability of seedling stage, tillering stage, jointing-booting stage, flowering stage and filling stage after delayed sowing of japonica rice by using the climate suitability model. The results showed that, after delayed sowing, seedling stage temperatures, precipitation and sunshine duration suitability were 0.98, 0.99 and 0.63 respectively; comprehensive climate suitability is 0.85, the degree was high; tillering stage were 0.99, 0.51 and 0.54, climate suitability was 0.65, the degree was medium; jointing-booting stage were 0.99, 0.87 and 0.67, climate suitability was 0.85, the degree was higher; flowering stage were 0.60, 0.98 and 0.57, climate suitability is 0.73, the degree was higher; filling stage were 0.60, 0.98 and 0.57, climate suitability was 0.73, the degree was higher. Climate suitability of late sowing japonica rice in Xinyang area was relatively appropriate.

Key words: japonica rice, late sowing, climate suitability, Xinyang City

摘要：

以信阳市近35年（1980-2014年）晚播粳稻幼苗期、分蘖期、拔节孕穗期、抽穗扬花期和灌浆成熟期等5个生育阶段的平均气温、降水量和日照时数等数据为基础，利用前人研究的气候适宜度公式模型，计算研究信阳粳稻晚播后的气候适宜度。结果表明，苗期气温、降水和日照气候适宜度分别为0.98、0.99和0.63，综合值0.85，适宜度高；分蘖期分别为0.99、0.51和0.54，综合值0.65，适宜度一般；拔节孕穗期分别为0.99、0.87和0.67，综合值0.83，适宜度较高；抽穗扬花期分别为0.70、0.99和0.56，综合值0.73，适宜度较高；灌浆成熟期分别为0.60、0.98和0.57，综合值0.73，适宜度较高。可见，信阳粳稻适当晚播后的气候适宜度总体较为适宜。

关键词: 粳稻, 晚播, 气候适宜度, 信阳