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首页> 外文期刊>Agricultural and Forest Meteorology >Measurement and modelling of gas exchange of leaves and pods of oilseed rape
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Measurement and modelling of gas exchange of leaves and pods of oilseed rape

机译：油菜叶片和荚果气体交换的测量和建模

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摘要

A generic steady-state gas exchange model was adapted to leaves and pods of the cruciferous species oilseed rape (Brassica napus L.). Parameter-nitrogen relationships were established to account for effects of organ senescence and nitrogen content. Components of dark respiration related to photosynthetic and to non-photosynthetic tissue of siliques were treated separately. A two-step calibration and validation approach relying on light response curves and diurnal time courses of CO2 exchange rate (A)and transpiration rate (E) measured on leaves and pods was used paying special attention on robustness, reliability, and universality of model parameterisation. Simulations of diurnal time courses of A and E of leaves and pods including the effects of nitrogen content and senescence on A and E correspond well to the observations. The model can be used to analyse and quantify eco-physiological patterns of gas exchange of both leaves and pods of oilseed rape, included as a submodel into existing canopy-scale gas exchange or growth models of this cultivar and adapted easily to other cruciferous species.
机译：通用稳态气体交换模型适用于十字花科油菜（Brassica napus L.）的叶子和豆荚。建立了参数-氮关系以说明器官衰老和氮含量的影响。与长角果的光合和非光合组织有关的暗呼吸成分被分别处理。使用了基于光响应曲线和叶片和豆荚上测得的CO2交换速率（A）和蒸腾速率（E）的昼夜时间过程的两步校准和验证方法，特别注意模型参数化的鲁棒性，可靠性和通用性。叶片和豆荚的A和E的昼夜时间过程模拟，包括氮含量和衰老对A和E的影响，与观测结果非常吻合。该模型可用于分析和量化油菜油菜叶片和豆荚气体交换的生态生理模式，可作为该品种现有冠层规模气体交换或生长模型的子模型，并易于适应其他十字花科物种。

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