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基于江西省地面气象资料和农业气象试验站数据,分析了江西省双季稻生育期的变化趋势,并利用生长度日(GDD)、低温度日(CDD)和高温度日(HDD)对1981—2007年江西省水稻各生育期热量资源的变化趋势进行分析.结果表明:气候变暖背景下,江西省水稻生长季平均气温、平均最低气温和平均最高气温均呈升高趋势,引起双季稻生长季缩短,其中,营养生长期日数减少最明显,而生殖生长期延长;生长度日和高温度日均增加,低温度日减少.研究期间,江西省双季稻有效热量资源增加,低温风险减少,但高温风险增多;江西省水稻有效热量资源的空间变化特征表现为东北部的增幅大于西南部,南部的低温风险大于北部,中部的高温风险最大.
Based on the data of ground meteorological data and agrometeorological test stations in Jiangxi Province, the changing trends of the growing season of double cropping rice in Jiangxi Province were analyzed and the results of GDD, CDD and HDD 1981 - The trend of heat resources in different growing periods of rice in Jiangxi Province in 2007 was analyzed.The results showed that under the background of climate warming, the mean temperature, mean minimum temperature and mean maximum temperature of rice growing season both showed an increasing trend, Rice growing season shortened, of which, the number of days of vegetative growth decreased most significantly while the reproductive growth stage was prolonged; the daily growth and the high temperature increased daily and the low temperature decreased.The effective caloric resources of double cropping rice in Jiangxi Province increased during the study period, The risk of rice decreased, but the risk of high temperature increased. The spatial variation characteristics of available caloric resources of rice in Jiangxi showed that the increase rate of northeast was higher than that of the southwest, the low temperature risk of the south was higher than that of the north and the highest temperature of the middle was the highest.