Studies on Stability for Parameters in Height-diameter Curve of Chinese Fir
- Received Date: 1997-08-07
- Available Online: 2012-03-17
Abstract: For height-diameter relationship model H=1.3+a1Hdb1 > 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 a1 and b1.The effect order from big to small on the stability for parameters in the height-diameter relationship model is slope,orientation,elevation and aspect.