利用l-草功能结构植物模型模拟分蘖生长发育的元建模方法比较

Couturier Arthur, Combes Didier, B. Romain, E. Abraham, L. Gaetan
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引用次数: 0

摘要

L-grass模型是模拟地上地下多年生牧草形态发生的功能-结构模型。然而,由于草原植物密度高,且多年来需要考虑的植物和器官数量多,其运行时间遵循迭代次数的次指数函数。本研究的目的是建立一个分蘖结构特征的元模型(即植物产生的速度和叶片的最终尺寸),能够解释广泛的基因型,轻度竞争制度和管理实践(即对落叶的反应),同时缩短模拟时间。比较了两种元建模策略。第一个包括输入参数和输出变量之间的“直接”经验关系。第二步是建立一系列基于中间变量的“嵌套”关系,这些中间变量模拟了L-grass调节草形态发生的功能。我们的研究结果表明,这两种策略都能够在没有落叶(即基因型和光竞争效应)的独立数据集上准确地再现l -草的模拟。然而,只有“嵌套”元模型方法能够在叶片大小和叶长方面解释落叶引起的塑料植物反应。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Comparison of meta-modelling approaches to account for tiller growth and development simulated by the L-grass functional-structural plant model
The L-grass model is a functional-structural model simulating the morphogenesis of perennial grasses above- and belowground. However, due to the high plant density in grasslands and the great number of phytomers and organs to consider over the years, its running time follows a sub-exponential function of the number of iterations. The objective of this study was to build a meta-model of the tiller architectural characteristics (namely the rate of phytomer production and the final dimensions of leaves) able to account for a wide range of genotypes, light competition regimes and management practices (i.e. response to defoliation), while presenting reduced simulation time. Two meta-modelling strategies were compared. The first consisted in "direct" empirical relationships between input parameters and output variables. The second consisted in building a series of "nested" relationships based on intermediate variables that mimicked the L-grass functioning to regulate grass morphogenesis. Our results showed that both strategies were able to accurately reproduce L-grass simulations for independent series of datasets in absence of defoliation (i.e. genotype and light competition effects). However, only the "nested" meta-modelling approach was able to account for the plastic plant response induced by defoliation in terms of leaf size and phyllochron.
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