松材线虫在我国的潜在适生性评价

Potential Suitability Assessment of Bursaphelenchus xylophilus in China

依据松材线虫的生物学特性及其生长发育与环境的关系,定量地刻画松材线虫在我国的潜在适生区。选取年均温(T)、6,7,8月均温(TN)、海拔(H)、25℃以上的天数(D)和年降水量(W)5项气候生态因子,应用模糊综合评判的数学方法定义5因子的隶属函数,以国家气象局气象资料室获取近30a全国639个台站的原始气象数据为依据,利用Qbasic6.0编制处理原始数据程序,把各个因子的原始气象数据根据各自定义隶属函数进行标准化处理得出隶属度,建立模糊综合评判矩阵,得出各个台站适生值。利用MapInfo7.5制作专题图,并划分出μ>0.9为最适宜;μ>0.8为适宜;μ>0.7为可以适宜:μ>0.6为不适宜;μ<0.6为极不适宜环境类型。

Potential suitable area for the pine wood nematodes, Bursaphelenchus xylophilus were described quantitatively. According to its biological characteristics and relationship between its development and the environment, five key factors were chosen, namely yearly mean temperature, the mean temperature of July, June and August, altitude, days above 25 ℃ and precipitation. Tneir subordination functions were defined with math method of synthetic assessment on fuzzy mathematics. Climatic data of 639 sites obtained from State Weather Administration were processed by program of Qbasic 6.0 in order to get its subordination value, and comprehensive suitable value of every site was calculated by creation of fuzzy judgment matrix. Finally Maplnfo 7.5 software was adopted for data collection, processing and analysis to make thematic map, five environmental types were graded according to comprehensive suitable value.