关键词: 鹅掌楸, 人工林, 生长模拟, 最优模型

Abstract: In Shimen Forest Farm of Zhenghe County, Fujian, the standard wood of Liriodendron chinense was selected for trunk analysis. Thirteen representative mathematical models such as Logistic, Webull and quadratic curve were used to measure the diameter at breast height(DBH), tree height and volume growth of L. chinense. After screening and verification, the best model for DBH growth was D=75.6887{1-e–[(T+2.3354)/19.5656]^3.1489}; the best model for tree height growth was H=(55.5498+34.2298T1.9310)/(119.6386+T1.9310); the best model for volume growth was V=2.5736{1-e–[(T–2.2455)/16.3381]^3.8741}, the determination coefficients of these three models were all 0.9999, the fitting accuracy was 99.7258%, 99.8827% and 99.7930%, respectively, and the average deviation, the average absolute deviation, the average relative deviation, the absolute value of average relative deviation were small. Compared with the measured values ??of the growth stages of each forest age segment, the data were highly consistent, the residuals were small, and the trend lines were consistent. It could be used to guide the prediction of the growth of young forests in L. chinense plantations in the northern of Fujian Province.

Key words: Liriodendron chinense, plantation, growth simulation, best model