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Towards understanding the role of ectomycorrhizal fungi in forest phosphorus cycling : a modelling approach

机译：了解Ececycorrohizal真菌在森林磷循环中的作用：一种建模方法

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摘要

Many studies have shown the importance of ectomycorrhizal fungi (EM) in forests both for nutrient availability and for carbon (C) and nutrient cycling in the soil. Yet so far they are not incorporated in forest ecosystem growth and yield models. Recent research suggests phosphorus (P) shortage could be a major constraints to forest productivity in the future. For a realistic simulation of future forest ecosystem functioning, inclusion of detailed soil P cycling and the trees-EM interaction is necessary. We developed a full ecosystem P model that simulates P uptake by roots and EM, allocation within trees, physiological deficiency effects on C assimilation and allocation, release through litter decomposition, coupled with water, C and nitrogen (N) fluxes accounted for in the mechanistic forest stand model ANAFORE. Our results confirm the importance of incorporating EM in forest ecosystem models and suggest that the lack of incorporation of P in models may result in an under- or overestimation of forest growth. This new model has the potential of being used to assess the response of trees and/or stands to nutrient availability under different climate and management scenarios. With the current parameterization it is functional as a scientific research tool to investigate hypotheses.
机译：许多研究表明，植物在营养可用性和碳（C）和土壤中营养循环的森林中的血液毒性真菌（EM）的重要性。然而，到目前为止，他们不纳入森林生态系统生长和产量模型。最近的研究表明，磷（P）短缺可能是未来森林生产力的主要限制。对于未来森林生态系统功能的现实模拟，必须包含详细的土壤p循环和树木 - EM相互作用。我们开发了一种全体生态系统P模型，通过根和em，树木内部分配，对C同化和分配的生理缺乏影响，通过凋落物分解释放，加上水，C和氮气（n）势态占机械师森林立场模型。我们的成果证实了在森林生态系统模型中纳入其中的重要性，并表明缺乏模型中的P掺入可能导致森林生长的低估或高估。这种新模式具有用于评估树木和/或在不同气候和管理方案下的营养可用性的响应。随着当前参数化，它是调查假设的科学研究工具。

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