在本研究中，水杉基准年龄为20，将20带入拟合好的导向曲线，得到导向曲

In the present study, Metasequoia reference age is 20, the good fit into the guide curve 20, the curve obtained theoretical guide tree height is 18.80 m, the number of stages is Metasequoia index position 18 m, and then corresponding to this Adjustment.

In this study, the reference age of the water fir is 20, 20 is brought into the well-fitting guidance curve, the theoretical tree height of the guide curve is 18.80 m, the status index level of the water fir is 18 m, and then adjusted accordingly.

In this study, the reference age of Metasequoia glyptostroboides is 20, and 20 is brought into the fitted guide curve. The theoretical tree height of the guide curve is 18.80 m, and the position index level of Metasequoia glyptostroboides is 18 m, and then this is adjusted accordingly.<br>