杉木树高曲线参数稳定性的研究

Studies on Stability for Parameters in Height diameter Curve of Chinese Fir

用浙江省开化县和江西省分宜县的１４８块杉木样地数据，在限制和非限制条件下，逐一分析了间伐及坡向、坡位、坡度、海拔４个立地因子对杉木树高曲线模型Ｈ＝１．３＋ａ１Ｈｄｂ１ｅｘｐ（－ｂ／Ｄ）参数稳定性的影响，结果表明：模型参数ｂ受间伐、坡向和海拔的影响较小，ａ１和ｂ１则受间伐和４个立地因子的影响较大。立地因子对杉木树高曲线参数的影响从大到小依次为坡度、坡位、海拔和坡向。

For height diameter relationship model H=1.3+a 1H d b 1 exp( -b/D) ,the effects on stability of the model parameters by thinning and four site factors (aspect,orientation,slope and elevation) are analyzed respectively with or without limit condition based on 148 plots of Chinese fir in Kaihua County of Zhejiang Province and Fenyi County of Jiangxi Province.The results have shown that thinning,different aspects and elevation have no significant influence on the parameter b. But thinning and the above mentioned 4 site factors have significant influence on the parameters a 1 and b 1 .The effect order from big to small on the stability for parameters in the height diameter relationship model is slope,orientation,elevation and aspect.