秦岭林区主要乔木树种抗火性能综合评价

Appraisal on the Fire resistance of the Main Tree Species in the Qinling Forest Region

以秦岭林区１６种乔木树种的７项理化性质指标和９项生物学及生态学特性指标为依据，分析了影响树种抗火性的因素，并利用主分量分析法结合植物抗火性梯度值（ＧＶ）对其抗火性能进行了综合评判。结果表明：冬瓜杨、落叶松、野核桃、山杨、锐齿栎、枫杨、河柳、铁杉、青榨槭等树种的抗火性较强，可作为该林区生物防火树种选择的依据。

Based on the indexes of 7 physicochemical and 9 bio ecological characteristics of 16 tree species in the Qinling forest region, factors on the fire resistance were analyzed and their fire resistance were also appraised by the method of PCA and gradient value of fire resistane.The results showed that the tree species with higher fire resistance were Salix sinica,Juglans regia,Populus purdomii, Pterocarya stenooptea,Toxicodendron vernicifluum,Populus davidiana,Abies chensiensis,Larix principis rupprectii and Acer davidii,and it provides the theoretical evidence for the selection of fire prevention tree species.