贵州茶叶不同生长季节日照时数时空变化特征

基于贵州省80个气象站点1961—2010年地面气象观测资料,采用数理统计方法分析了贵州省茶树生长期近50 a来日照时数时空变化特征,研究结果表明：春茶、夏茶日照时数时间变化较为相似,呈现减少趋势,分别占总站数的95%、93.7%。秋茶时段日照时数时间变化表现为北部、南部呈现减少趋势,中部以西地区呈增加趋势,正值区站点有16个,占总站数的20%。日照百分率的下降主要表现在夏茶,春茶、秋茶下降表现的不很明显。对贵州省自20世纪60年代以来日照的空间分布的年代际变化进行了分析,春茶和夏茶生长季节在70年代的日照时数均表现为减少的趋势,而贵州北部夏茶生长季节日照时数年代际变化无论在哪个年代都表现为持续减少的趋势。

The Spatial and Temporal Variations Characteristicsof Sunshine Hours of Guizhou Tea in Different growing seasons

Based on the 80 stations of surface meteorological observations from 1961 to 2010 in Guizhou Province,and using the Mathematical Statistics to study the evolution of spatial structure and temporal of sunshine time nearly 50 years in Guizhou province,the results showed that： the changes of sunshine time in spring,summer tea is similar,showing a decreasing trend,account of the total number of stations are 95% and 93. 7%,respectively. The changes of sunshine time in autumn tea in north,south Guizhou showed a decreasing trend,and showed an increasing trend in west and central Guizhou,sites in positive area are 16,account 20 percent of the total number of stations. The decline of sunshine percentage mainly in summer tea,the decreased performance in spring,autumn tea is not very obvious. Decadal variations of sunshine spatial distribution in Guizhou Province from the 1960 s to now were analyzed,sunshine time in spring and summer tea growing season during the 1970 s were reflected as a decreasing trend,no matter what age interannual variability of sunshine time in summer tea growing season in northern Guizhou have shown a decreasing trend.