Research on Growth Process and Growth Models of Quercus veriabilis\nin Beijing Region
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Abstract
Based on the data of 8 analytical trees originated from 3 types tree source collected from Xishan and Dayanshang area of Beijing, the growth process of DBH, height and volume and the relationship between DBH and height were analyzed respectively; 4 theoretical equations were applied to fit the growth process. The results showed that the 3 types of sample trees were all in the fast growing stage which was far from quantity mature stage; the comparison of growth process among the 3 types of sample trees showed that the growth of trees originated from seedling sprouts were the fastest, followed by trees originated from natural regeneration and trees originated from planted seedlings, however, the trees originated from seedlings showed larger growth potential than those originated from seedlings sprouts; the results of DBH-height relationship showed a positive correlation trend; but the height growth of trees originated from seedling sprouts became slower when the DBH larger than 7 cm; the results of 4 fitted theoretical equations showed that Richards,Mitscherlich and Gompertz equations well fitted the growth processes of DBH, height and volume of the sample trees, while the fitting precision of Logistic equation was relatively lower. This study can provide reference for the management of Quercus variabilis forest in Beijing.
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