气象因子在宣城茶叶区划中的应用

根据宣城地区1981~2010年茶叶产量与气象、土壤和地形因子的相关分析,结合宣城全市区域站2012~2013年的逐日气温和降水资料,筛选出茶叶区划指标为6个气象因子(≥10℃有效积温、3~4月份降水量、3~4月份平均气温、夏季低云量、冬季总云量和干燥度)、3个地形因子(海拔高度及坡度、坡向)和2个土壤因子(土壤质地和土壤pH),采用加权指数求和法,建立宣城地区茶叶综合区划评估模型,借助GIS技术,将宣城地区茶产区划分为最适宜区、适宜区、一般适宜区和不适宜区。结果表明,宣城地区茶树最适宜区面积61.7 km2,约占宣城地域面积的0.5%,主要集中海拔高度在193~401 m的山区;茶树适宜区面积6 694.7 km2,约占宣城地域面积的54.2%;茶树一般适宜区面积5 593.4 km2,约占宣城地域面积的45.3%。

Application of Meteorological Factors in Tea Regionalization in Xuancheng

According to the analysis of the relationships among tea yieht, meteorological conditions, soil conditions and Iopographic conditions daring 1981 -2（110 in Xuancheng At＇ca, combined with daily temperature and precipitation data during 2012 -2013 fi＇om the regional stations in Xuancheng Area, regionalization indices including 6 climate factors （the I〉 10 if2 effective temperature, March and April precipitation, March and April average temperature, low cloud cover in summer, Tntal cloud cover in winter, Dryness）, 3 topographic faetors （ahitude and slope, aspec＇l ） and 2 soil ia.clors （ soil lexlure and soil pH） , using the weighted index summation method, the evaluation model for comprehen- sive rcgionalizatinn was established. With （;IS technology, Xaancheng tea-producing areas will be divided into the most suitable area, suitable area, general suitable area and unsuitable area. The resuhs showed the most suitable area is 61.7 km2 , accounting fi）r 0.5% of the geograph- ical area of Xuancheng, The most suitable area mainly distributed al the ahitude of 193 -401 m in the mountains. Tea suitable area is 6 694.7 kin2, accotmting I~r 54.2% of the, geographical area of Xuancheng. Tea generally suitable area is 5 593.4 km2, accounting for 45.3% of Xu- ancheng geographical area.