摘要
利用石河子气象站1961—2009年日照资料,用最小二乘法进行线性拟合,对日照时数年、季变化趋势进行分析,结果表明:近49a来石河子垦区日照时数总体呈增加趋势,年日照时数以7h/10a的速度增加。各季年际变化趋势从大到小依次为春季>夏季>秋季>冬季,其中春季增加最为明显,平均每10a增加18.5h。棉花、甜菜、玉米和油料等作物均为喜温喜光作物,日照时数的变化对其有较大影响,通过对四大作物的平均单产与相应年4—11月的日照时数的分析,得出作物单产随日照时数增加而增加,并建立产量与日照的相关模型。
Using the sunshine data from Shihezi meteorological station during 1961-2009,this paper analyzed the sunshine of annual and seasonal change trend by the linear fitting of least squares method.The results showed that,in last 49 years,the sunshine hours tended to increase generally in Shihezi region.The average annual sunshine duration increased nearly by 7 h in every 10 years.The inter-annual increase trend in each season was springsummerautumnwinter.The increase rate is the highest in spring with the rate of 18.5 h in every 10 years on average.Because cotton,beet,corns and oil plants are all thermophilic and light-favored crops,the change of sunshine duration has much influence on them.Based on the analysis between average yield of the four crops and its corresponding sunshine duration from April to November,we obtained the conclusions that the crop yield increased with the increasing sunshine hours,and set up the correlation model between average yield and sunshine duration.
出处
《沙漠与绿洲气象》
2011年第1期49-52,共4页
Desert and Oasis Meteorology
关键词
日照时数
年变化
季变化
相关性
sunshine hours
annual variation
seasonal variation
correlation
