A Study on the Growth Characteristics of Phoebe bournei in Natural Forest and Plantation Stands

The natural forest and plantation community investigation and stem analysis were conducted in order to study the stem growing process of Phoebe bournei in Ji'an,Jiangxi Province.The results indicated that:the growth characteristics of tree height and breast height diameter(DBH) and volume of P.bournei in natural forest were similar to those in plantation tree and the growth process could be divided into 3 stages.1~10 a was the slow growth stage of tree height and DBH and individual tree volume.10~20 a was the fast growth stage of tree height,in which the current annual increment was over 0.60 m and 10~30 a was the fast growth stage of DBH,in which the current annual increment was over 0.86 cm and 15~25 a was the increasing stage of individual tree volume.20 a later was the uniform growth stage of tree height,in which the current annual increment was over 0.33 m.30 a later DBH growth was slow,in this stage the current annual increment was over 0.44 cm.And 33 a was its quantitative maturity period,and along with tree age increasing,the shape of tree unceasingly approached to the cone and the individual tree volume increased rapidly 25 a later,the annual growth increment of individual tree volume was over 0.013 63 m3.It may be concluded that,P.bournei growth is not slow.It is one of the fine trees of large diameter wood of precious broad-leaved trees.