根构型模拟模型及其应用

根构型定量表述是确定植物根系养分吸收的基础。因生长在不透明土壤中的根系难于被观测和分析解释，这就使得模拟模型成为研究相关问题的一种重要的补充方法。本文对根构型模型作了综述，介绍了根构型的几何模拟方法，评述了作为根构型与养分吸收主要模型的SIMROOT平台。通过采用“扩展树”数据结构并在SGI工作站上操作，这一模型能展现根系生长的生动图形。进而还可将此模型进一步开发用于评价扩散性养分的吸收。根构型模型的应用，包括我们改进模型对根系内及多根系间的养分竞争进行的模拟，也作了介绍。

Simulation Models of Plant Root System Architecture and Application: A Review

Quantification of root system architecture is essential for determining nutrient uptake by plant roots. Growing in opaque soils, roots are difficult to observe and interpret. This makes simulation modeling an attractive complementary approach. In this paper, root architecture models were reviewed and methods for constructing geometric models were introduced. SIMROOT, an important model for root architecture, was described as related to nutrient acquisition. By employing Extensible Tree data structure implemented on a SGI computer, this model provides vivid graphical visualization of root growing. Furthermore, the model can be developed to evaluate uptake of diffusive nutrients by plants. The application of these models was introduced. Modifications of the model to simulate competition for nutrient uptake within and between roots were also discussed.