平原农田防护林杨树生长模型及应用研究

Study and application of the poplar growth model of the shelterbelts in plain area

摘要: 应用MATLAB6.5软件,采用经典理论生长方程Logistic方程、Richards方程、单分子式(Mitscherlich)方程对苏北平原建湖县农田防护林I72杨的平均高、优势高、平均胸径、平均材积生长数据进行曲线拟合,结果表明,Logistic方程拟合胸径、平均高生长效果最好,而Richards方程拟合优势高、材积生长效果最好,并运用拟合模型结果进行立地质量评价和成熟龄确定.

Abstract: Applying software MATLAB6.5,selecting classical growth function of logistic and Richards and Mitscherlich,the growth model of average height,advantage height,average diameter in breast height and volume of poplar I-72 of shelterbelt in jianhu county were established . The result of function curve estimation shows that the logistic function is the best function for DBH and average height , the Richards function is the best function for advantage height and volume. Assessment of the site quality was carried o...