1961—2010年贵州茶树生长期降水量的时空变化

Temporal-spatial Variations of Precipitation in Tea Growing Period in Guizhou During 1961-2010

为贵州茶树生产中灾害防御、栽培技术调整以及区域布局优化提供参考,促进贵州茶业持续发展,利用贵州省82个气象站点1961—2010年地面气象观测资料,采用ArcGIS及数理统计方法,分析贵州茶树生长期降水量的时空分布特点及变化趋势。结果表明:1)研究区茶树生长期降水量最大是夏茶季,其次是秋茶季;夏茶季和秋茶季降水量空间分布相似,由西到东逐渐减少,春茶季和茶树越冬期降水量空间分布反之。2)夏茶季多年降水量表现为增加趋势,春茶季、秋茶季以及茶树越冬期降水量均呈减少趋势,呈减少趋势的站点占研究区域总站数的比例分别为93%、100%和88%。3)春茶季和秋茶季地区间降水量差异呈缩小趋势,夏茶季和茶树越冬期降水量的地区间差异增大。

Based on the ground observation data from 82 meteorological stations during 1961-2010,the temporal-spatial variation and the trend of precipitation in tea growing period in Guizhou was evaluated by the methods of statistics and ArcGIS in order to provide a reference for disaster prevention,cultivation technology adjustment and regional layout optimization and promote the sustainable development of Guizhou tea industry.Results：the summer tea precipitation accounted for the most in tea growing period in the study area,followed by autumn tea;the spatial distribution of summer tea precipitation was similar to autumn tea,which reduced gradually from west to east;on the contrary,the precipitation increased gradually from west to east during spring tea and winter periods.The average precipitation of summer tea showed an increasing trend.However,those of the tea plants for other seasons tended to decrease.The number of stations with descending trends for spring tea,autumn tea,and winter tea occupied a proportion of 93%,100% and 88% of the total,respectively.The differences between regions in spring tea and autumn tea were decreasing while he differences of summer tea and winter tea precipitation were increasing.