摘要
Abstract
[ Objective ] The aim was to study the characteristics of thermal climate resources changes of agricultural production during frost period in Jianchang County. [ Method] By dint of Jianchang climate resources and routine numerical statistics method, the sunlight and temperature changes trend from 1960 to 2009 in Jianchang County were analyzed. [ Result] The sunshine hours and sunshine percentage during frost period in Janchang County from 1960 to 2009 tended to decrease. The climate tendency rates were -55. 556 h/10 a and -2.39％/10 a, respectively, 287 h and 12％ of deduction in recent 50 years. There was climate transition in 1981 and 1982. And there was a shortage of 161 h and 7％ of sunshine hours and sunshine percentage before and after the transition. The temperature during frost period increased, the tendency rates of average temperature, average maximum and lowest temperature were 0. 386, 0.392 and 0. 567 ℃/10 a, namely there was a growth of 1.93, 1.96 and 2.84 ℃ in recent 50 years. There was temperature transition in 1987 and 1988. The average temperature, average maximum and lowest temperature increased by 1.3, 1.2 and 1.7 ℃. In recent 50 years, sunshine resources during frost period in Jianchang were decreasing, while thermal resources were strengthening, forming complementary of light and heat. [ Conclusion] The study provided climate accordance for the development of local facility agriculture during frost period.关键词
霜期/设施农业/光热气候资源/变化特征/建昌县Key words
Frost period/ Facility agriculture/ Light and heat climate resources/ Characteristics/ Jianchang County分类
天文与地球科学
