国外作物生长模型区域应用中升尺度问题的研究

A study on abroad challenges of scaling-up of crop models for regional applications

系统研究总结了小区或田间尺度上开发的作物生长动力模拟模型应用于更大区域尺度和更高级系统水平时 ,易发生环境变量的时空变异、响应变量的空间归并以及由于空间平均、时间变异和现有模型未考虑的新特性及其新过程时所产生的偏差等升尺度问题 。

Several challenges of scaling-up that arise when appl yi ng crop simulation models developed for the plot-scale level or the field-scal e level to broader spatial scales and higher system levels are systematically su mmarized. These problems include the variability of environmental variables in space and time,the spatial aggregation of response, spatial average bias, tempor al variability bias and bias occurring because of neglecting new properties and processes in the existing models. Some potentially useful approaches for control ling and minimizing these errors are concluded.