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应用油松、响叶杨不同枝径、不同枝长的试样，通过在较高恒温条件下进行不同时间的干燥试验认为，水分逸出率可以作为评价树种燃烧性的一个水分指标。结果表明，该指标与测定时间的关系可用Ｌｏｇｉｓｔｉｃ模型表示，并与枝径呈指数函数关系，与枝条呈ｂ＜０的双曲线函数关系。研究确定了该指标的标准化测定方法，即测定恒定温度１４０℃；枝径１ｃｍ；测定时间０．５ｈ，枝长２０ｃｍ，若测定时间为１ｈ，枝长为１５ｃｍ。
By using the test of different branches and branches of Pinus tabulaeformis and Populus simonii, it can be concluded that the water expulsion rate can be used as a moisture index to evaluate the combustibility of the tree species through the drying experiments at different temperatures. The results show that the relationship between the index and the determination time can be expressed by Logistic model and the relationship between the index and the branch diameter is exponential function, and the branch hyperbolic function with b <0. The method of determining the standardization of this indicator was studied, that is, the determination of the constant temperature of 140 ℃; the branch diameter of 1cm; the determination time of 0.5h and the branch length of 20cm. If the determination time is 1h, the branch length is 15cm.