用均匀设计试验法和单纯形法建立生长模型

Study on Establishing the Model of Growth with Uniform Design Experiment Method and Simplex Method

用Ｒｉｃｈａｒｄｓ方程作为杉木人工林生长模型，按照均匀设计试验法的要求选择标准地，用改进单纯形法求解生长模型的参数．用均匀设计试验法结合单纯形法建立生长模型，不仅可以满足精度要求，而且所需要的标准地数量极少，大大地减少了经费和时间，在林业生产上有重要的经济意义．

The paper deals with establishing the model of growth for Chinese fir stands with uniform design experiment method and simplex method by using Richards formula as the model,selecting sample plots according to the requirements for uniform design experiment method,and calculating the parameters of the model with improved simplex method. The method can satisfied the requirements for precision with extremely few plots required,thus reducing expenses and time very much, and having important economical significance in forestry production.