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Relationship between substrate initial reactivity and residues ageing speed in carbon mineralization

机译：碳矿化过程中底物初始反应性与残渣老化速度的关系

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摘要

A desk study was conducted on the general relationship between substrate initial reactivity and the speed of ageing of residues in carbon mineralization. Totally 306 sets of experimental data were collected from 36 studies, covering a wide range of substrates and soil and environmental conditions. A model was used as a framework, which treats a substrate and subsequent residues as a whole, and describes the carbon mineralization with two parameters: the initial average rate coefficient (R) and the speed of ageing of residues (S). While both R and S were affected by substrate properties as well as by soil and environmental conditions, they were positively related to each other. In other words, the more quickly mineralization goes in the beginning, the more quickly the residues age. As a result, the initial differences in substrate reactivity would disappear over time, but the differences in residues quantity and carbon loss rate could last much longer, with substrates initially less reactive having higher carbon loss rates. The implications of the relationship between R and S was discussed with respect to dynamics of residues reactivity, quantity and carbon loss rate in relation to effects of substrate differences and impacts of external conditions.
机译：进行了一项案头研究，研究了底物初始反应性与碳矿化中残留物的老化速度之间的一般关系。从36项研究中总共收集了306套实验数据，涵盖了广泛的基质，土壤和环境条件。使用模型作为框架，该模型整体上处理底物和后续残渣，并使用两个参数描述碳矿化：初始平均速率系数（R）和残渣的老化速度（S）。尽管R和S都受基质性质以及土壤和环境条件的影响，但它们之间却是正相关的。换句话说，开始的矿化越快，残渣的老化就越快。结果，底物反应性的初始差异将随时间消失，但​​是残留物数量和碳损失率的差异可能会持续更长的时间，而最初反应性较低的底物具有较高的碳损失率。讨论了残留物反应性，数量和碳损失率与底物差异影响和外部条件影响有关的动力学方面的关系。

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