Growth Characteristic of Toona sinensis Plantaion in Junlian County
Gao Ji · Sichuan Forestry Exploration and Design · 2015
The growth characteristic of Toona sinensis plantation in Junlian County had been studied. The results showed that: Tree height growth of Toona sinensis was earlier than the breast diameter growth; The maximum of current annual increment and mean annual increment of the breast diameter and tree height appeared nearly synchronously( 16 a and 2 a),the maximum of current annual increment of timber volume appeared at about 16 a,earlier than the maximum of mean annual increment; The current annual increment and mean annual increment of breast diameter intersected at 17 a,which of tree height intersected at 10 a,and which of timber volume didn't intersect during 20 a,that means 20 a Toona sinensis didn't attain the quantitative maturity. The growth process of 20 a Toona sinensis was divided into such 3 periods as young stand period( 0 ~ 4 a),fast-growing period( 5~ 1 a),and near mature period( 12 ~ 20 a).