其中，H为优势木树高，A为优势木年龄，a、b为方程参数。方程拟合使用S

Here, H is the height advantage wood tree, A is the dominant tree ages, a, b for the equation parameters. Fitting equation using statistical software SPSS 21, using the method of least squares parameter estimation equation, the coefficient selection decision (R2), the root mean square error (RMSE) to select the optimal curve equation as test indicators. The formula is as follows

Among them, H is the superior wood tree height, A is the dominant wood age, a, b is the equation parameter. Equation fitting uses SPSS 21 statistical software, uses the least square method to estimate the equation parameters, selects the decision coefficient (R2), and the mean square root error (RMSE) as the test index for selecting the optimal curve equation. The formula is as follows

Among them, h is the height of dominant wood, a is the age of dominant wood, a and B are equation parameters. SPSS 21 statistical software is used for equation fitting, the least square method is used for equation parameter estimation, and the determination coefficient (R2) and root mean square error (RMSE) are selected as the test indexes for selecting the optimal curve equation. The formula is as follows<br>