青岩油杉种群密度的GM(1,1)组合模型

Combined Model of Keteleeria davidana var. Chin peii Population Density

探讨了植物种群ＧＭ（１，１）组合模型的理论和方法。以种群密度为时间数据序列，建立了青岩油杉种群密度的ＧＭ（１，１）组合模型，并对其精度进行了分析。结果表明，ＧＭ（１。

The theory and method of GM(1,1) combined models of plant populations were introduced. Based on the time serial data of density of Keteleeria davidana var. chin peii population obtained from Qingyan town of Guizhou province, a density GM(1,1) combined model of the population was established and its predictive precisions were compared with those of the GM(1,1) and the parabola model. The results showed that the GM(1,1) combined model may be one of the more effective and convenient population dynamic models.