The construction of larch plan tation relatively growth model

Relative growth is defined as the description of the growth relationship between biological and biological part (organ). The relative growth function is a function on variable of growth and non-time variables. In the paper, a system relative growth model was constructed by the means of relatives the average height, the stand basal area at breast height, height-diameter curve, stem curve, stand density and the growth of diameter class basal area. The system model was constructed in order to predict the growth of the stand and the diameter. The results show that the model had the advantages of generality which was an effective method to predict the growth of different stand. The relative growth model is an effective method to predict the growth of stand.