According to the requirements of growth of Manihot esculenta,such as climilate conditions and altitude,and combined with the meteorological statistical data of the main meteorological stations in the counties in Guizhou Province during 1995-2014,we selected the key meteorological index of Manihot esculenta cultivation in Guizhou Province (such as annual average temperature,average temperature in most cold month,the lowest temperature of the most cold month,accumulated temperature above 10 ℃ and duration of daily average temperature below 0 ℃).Based on "3S" technology,we established the regression model of heat index and latitude of suitable planting areas of Manihot esculenta,definited the planting areas and made clearly the planting climatic zoning of Manihot esculenta in Guizhou Province.Results showed that size of suitable planting area was 126 642.3 hm2,the planting area of Manihot esculenta in Guizhou Province could be divided into the advantageous regions and common regions,the area of advantageous regions was 114 683.8 hm2 and distributed mainly at 17 counties around Nanpan,Beipan,Red,Zhang and Liu river drainage area,the area of common regions was 11 958.4 hm2 and distributed mainly at Chishui City and Xishui County around Chi river drainage area.%根据木薯生长发育对气候条件、海拔等要素的要求,结合贵州省各个县市主要气象站点1995-2014年的气象统计资料,选取贵州省木薯栽培的气象指标(年平均气温、最冷月平均气温、最冷月平均最低气温、≥10 ℃活动积温和日均温≤0 ℃最长连续时数),基于"3S"技术,建立木薯可种植区域热量指标与海拔的回归模型,明确贵州木薯的种植区域,得到种植气候区划.结果表明,贵州省木薯适宜种植区面积126 642.3 hm2,其中优势种植区总面积为114 683.8 hm2,主要分布在南盘江流域、北盘江流域、红水河流域、樟江流域和都柳江流域的17个县市;一般种植区总面积为11 958.4 hm2,主要分布在赤水河流域的赤水市和习水县.
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