A STUDY ON GROWTH CHARACTERISTICS OF YOUNG PLANTATIONS OF SOME TREE SPECIES OF MAGNO LIACEAE
木兰科树种幼树生长特性的研究

The analysis and comparision of the growth charactristics of 13 treespecies of Magnoliaceae were carried out by using qualitative and qua-titative analysis. The results showed the followings: 1. The ordination of fast-growing tree species by principal componentanalysis indicated that their mean increment is higher than that ofMagnolia grandiflora used as control in the experiment. The fast-gro-wing species showed two growth peaks during seasonal growth, and thefast-growing point is most likely to appears from middle of June or July. 2. The seasonal growth can be expressed by a Logistic model. Byparameterization of the model with the experiment data, some informa-tion such as fast-growing point, fast-growing period and value of growthcharacteristics in each tree species can be obtained. 3. There is a significant linear corelation between tree growth inc-rement and the product of growth time and maxium speed of growth.