在综合干曲线式和相对干形的基础上 ,针对解决应用研究问题 ,文章首次提出四参数柱干比曲线式。用取自秦岭林区的油松与栎类样木、标准木资料进行拟合 ,带皮油松 R2≥ 0 .99的占了93% ,去皮为 78% ;而带皮、去皮栎类依次为 79.8%、73.3% ,说明四参数柱干比曲线式具有较好的拟合性。通过计算得 4个参数值 ,进一步作出了两树种的带皮、去皮四参数干曲线图 On the basis of comprehensive dry curve and relative dryness, in order to solve the problem of applied research, the article first proposes four-parameter column-dry ratio curve. Pine trees and oak-like wood samples collected from Qinling forest area were used for fitting. The pine-tree pine with R2≥0.99 accounted for 93% and the peeled was 78%, while the peeled and peeled oak The classes are 79.8% and 73.3%, respectively, indicating that the four-parameter column-dry curve has a good fit. By calculating the value of four parameters, two tree species were further made with skin, peeled four parameters of the dry curve