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Assessment of ‘3DS’, a soil module for individual-based models of plant communities

机译:评估“ 3DS”,这是用于基于个体的植物群落模型的土壤模块

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A 3D soil module was developed by generalizing the STICS crop-soil model formalisms to 3D grids in order to couple individual root structures from plant communities with spatialised soil processes. The model was quantitatively assessed on the basis of different field and controlled condition experiments. Root length distributions and plant N demands were forced as measured to focus evaluation on the soil model and plant-soil coupling. The results showed that the model accurately predicted soil evaporation, plant transpiration and plant N uptake. Predictions of water content and mineral N distributions were less accurate. The model did predict the first order changes in the uptakes in relation with the spatio-temporal development of roots, but tended to overestimate uptakes by deep roots. Model predictions using such a 3D approach proved more accurate than simulations based on the assumption of horizontally homogeneous distributions of root densities and soil state variables.
机译:通过将STICS作物-土壤模型形式化形式推广到3D网格,开发了3D土壤模块,以便将植物群落中的单个根结构与空间化土壤过程耦合在一起。该模型是根据不同领域和受控条件实验进行定量评估的。强制测量根长分布和植物氮需求,以集中评估土壤模型和植物-土壤耦合。结果表明,该模型能够准确预测土壤蒸发,植物蒸腾作用和植物氮素吸收。水分含量和矿物质氮分布的预测不太准确。该模型的确预测了与根系时空发展有关的吸收量的一阶变化,但往往高估了深根的吸收量。与基于根密度和土壤状态变量的水平均匀分布的假设进行的模拟相比,使用这种3D方法进行的模型预测证明更为准确。

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