近50年建昌县霜期设施农业生产中光热气候资源变化特征

目的]研究近50年建昌县霜期设施农业生产中光热气候资源变化特征。方法]利用近50年建昌县气候资料,采用常规数理统计方法,分析了1960～2009年建昌县霜期光照、气温变化趋势。结果]1960～2009年建昌县霜期日照时数、日照百分率呈减少趋势,气候倾向率分别为-55.556 h/10 a、-2.39%/10 a,近50年分别减少了278 h和12%;1981、1982年发生了气候跃变,跃变前后日照时数、日照百分率分别减少161 h和7%。霜期气温总体呈升高趋势,平均气温、平均最高、最低气温气候倾向率分别为0.386、0.392和0.567℃/10 a,近50年分别上升了1.93、1.96和2.84℃;1987、1988年发生气温跃变,跃变前后霜期平均气温、平均最高、最低气温分别升高了1.3、1.2和1.7℃。近50年来,建昌霜期光照资源减少,而热量资源增加,形成光热互补。结论]该研究为当地霜期设施农业的发展提供了气候依据。

Characteristics of Thermal Climate Resources Changes of Agricultural Production during Frost Period in Jianchang County

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 ...