在研究杨树溃疡病导致幼树生长量损失的过程中,找到一个适用的回归模型。经数学检验,回归曲线形状合理,各项指标均较好。此外,使用此模型能从数学上精确地描述生长量变化的生物学规律,这对生产部门预测病害可能造成的损失,掌握防治指标及估算防治经济效益具有重要意义。 In the study of poplar canker disease led to the loss of growth of young trees, find a suitable regression model. After mathematic test, regression curve shape is reasonable, the indicators are better. In addition, the use of this model can describe the biological laws of the change of growth quantitatively and accurately, which is of great significance for the production department to predict the possible losses of the disease, to master the prevention and treatment indexes and to estimate the economic benefits of prevention and treatment.