Climate Regionalization for Introducing Southern Types of Populus spp. to Hubei Province

A climate regionalization study for introducing southern types of Populus spp.to Hubei Province was carried out by means of Fuzzy mathematics methodology.Six meteorological elements i.e.,accumulated temperature≥10 ℃,warmth index,average annual rainfall,the extreme minimum temperature,frost free periods and the average annual temperature were selected to calculate the similarity degree regarding to climate conditions among Qianjiang County,Hubei Province as the fixed sample location and the samples of all counties in the province.According to the sum of the total weighted value,integrated with ecological characteristics of the southern types of Populus spp.,all the areas where southern types of Populus spp.were introduced and planted in Hubei Province were classified into the optimal planting area,the appropriate planting area and the unsuitable planting area.In addition,the right cultivars or clones of southern types of Populus spp.were recommended for each area in Hubei Province.