浙西南山地日本扁柏人工林生长过程及模型研究

Study on the growth process and model of Chamaecyparis obtuse plantations in the southwest of Zhejiang Province

为研究浙西南山地引种栽培的日本扁柏人工林生长过程及其模型,采用树干解析法进行研究。结果表明:36年生日本扁柏树高、胸径与材积生长量分别达到了11.36 m、13.68 cm、0.089 47 m3,年平均生长量分别为0.32 m·a^(-1)、0.38 cm·a^(-1)、0.002 49 m2·a-1,连年生长量分别为0.25 m·a^(-1)、0.20 cm·a^(-1)、0.004 29 m2·a-1。树高快速生长期为6~12a,胸径快速生长期为6~15a,材积逐年增长。36年生时材积连年生长量大于平均生长量,材积生长没有达到数量成熟。树高、胸径、材积与树龄的拟合方程分别为y树高=11.583 8/(1+e2.845 0-0.1598 36x)、y胸径=12.713 8/(1+e3.949 3-0.257 878x)、y材积=0.116 384/(1+e4.830 0-0.166 335x)。

The growth characteristics and model of Chamaecyparis obtuse plantations were investigated in this study by using the stem analysis method. The results showed that the height,DBH and volume of 36-year-old C. obtuse were 11. 36 m,13. 68 cm,and 0. 089 47 m3,respectively,while the mean annual increments were 0. 32 m·a^-1,0. 38 cm·a^-1,0. 002 49 m2·a^-1,the current annual increment were 0. 25 m·a^-1、0. 20 cm·a^-1、0. 004 29 m2·a^-1. The fast growing period of tree height was in 6 to 12 years old and the fast growing period of DBH was in 6 to 15 years old,the volume was increased with the tree age. The current annual increment was larger than mean annual increments in 36 th, so C. obtuse trees had not reached the quantitative maturity of volume. The fitting equation of tree height,DBH and volume with age were yheight= 11. 583 8/（1 ＋ e2. 845 0-0. 159 836 x）,yDBH= 12. 713 8/（1 ＋ e3. 949 3-0. 257 878 x）,and yvolume= 0. 116 384/（1 ＋ e4. 830 0-0. 166 335 x）.