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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 seven physical and chemical properties indexes and nine biological and ecological characteristics indexes of 16 species of tree species in Qinling forest area, the factors influencing fire resistance of tree species were analyzed. Principal component analysis (PCA) method combined with plant fire resistance gradient value (GV) conducted a comprehensive evaluation of its fire resistance. The results showed that the fire resistance of tree species such as wax gourd poplar, larch, wild walnut, poplar, oak, maple, heliotrope, hemlock, in accordance with.