摘要
选取鹅掌楸(Liriodendron chinense)标准木进行树干解析,采用Logistic、Webull、二次曲线等13个有代表性的数学模型对鹅掌楸胸径、树高和材积生长进行方程拟合。经筛选和验证,得出鹅掌楸胸径生长的最佳模型为:D=75.6887{1-e^–[(T+2.3354)/19.5656]^3.1489};树高生长的最佳模型为:H=(55.5498+34.2298T^1.9310)/(119.6386+T^1.9310);材积生长的最佳模型为:V=2.5736{1-e^–[(T–2.2455)/16.3381]^3.8741}。这三个模型的决定系数均为0.9999,拟合精度分别为99.7258%、99.8827%、99.7930%,且平均偏差、平均绝对偏差、平均相对偏差、平均相对偏差绝对值较小。各林龄段的生长预测值和实测值比较,数据吻合度高,残差总体偏小,趋势线表现一致。各模型可用于指导预测福建省闽北地区鹅掌楸人工林中幼林的生长情况。
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+34.2298T^1.9310)/(119.6386+T^1.9310);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.
作者
朱祥锦
ZHU Xiang-jin(Zhenghe Extending Center for Forestry Science and Technology,Zhenghe 353600,Fujian China)
出处
《亚热带植物科学》
2020年第1期46-51,共6页
Subtropical Plant Science
基金
福建省科技厅重点项目“马褂木营养高效种源选择及共生菌根研究”(2003N040)
关键词
鹅掌楸
人工林
生长模拟
最优模型
Liriodendron chinense
plantation
growth simulation
best model
