Curve Regression and Path Analysis of Tree Measurement Fac-tors of Dominant Species Diospyros morrisiana in Fangcheng Seasonal Rainforest
In order to explore the morphological characteristics and related growth rules of the dominant spe-cies Diospyros morrisiana in the seasonal rainforest of Fangcheng,this study was based on the measured data of 1 hm2 community sampling plots in the seasonal rainforest of Nashanzi,Fangcheng,and the tree measure-ment factors were analyzed by curve regression and path analysis.The results showed that there was a ex-tremely significant correlation between plant height(H),diameter at breast height(D)and crown width(W)of D.morrisiana.The optimal regression equations of D and H,D and W,and H and W were all power curve models,and the expressions were H=3.0248 × D0.4501(R2=0.634)、W=0.6600 × D0.5462(R2=0.613)and W=0.3147 × H0.9108(R2=0.545)respectively.The effect of D on plant height was greater than that of D on crown width,and the effect of D on crown width was greater than that of plant height on crown width.Therefore,the plant height and crown width of D.morrisiana can be estimated by measuring its diameter at breast height.
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