Abstract: Nonlinear growth models and the matrix growth models based on a linear growth function are always used independently in simulating the growth dynamic of stands. Based on Buongiorno and Michie's matrix model, a set of nonlinear growth models of uneven-aged stands with three units are established in this paper. The development of the uneven-aged stands is predicted by using both linear and nonlinear growth models. The results show that the combined use of nonlinear growth model and matrix model has the advantages of being well-knit and highly precise, so that it is an effective method for predicting the growth dynemic of stands. The data used here orginated from the Korean pine mixed forest in Changbai Mountains.

Key words: Uneven-aged stands, Transition matrix, Nonlinear model, Dynamic simulation, Growth prediction