Climate Change Science Institute and Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831-6301, USA.
FEMS Microbiol Ecol. 2012 Sep;81(3):610-7. doi: 10.1111/j.1574-6941.2012.01389.x. Epub 2012 Apr 30.
We attempted to reconcile three microbial maintenance models (Herbert, Pirt, and Compromise) through a theoretical reassessment. We provided a rigorous proof that the true growth yield coefficient (Y(G)) is the ratio of the specific maintenance rate (a in Herbert) to the maintenance coefficient (m in Pirt). Other findings from this study include: (1) the Compromise model is identical to the Herbert for computing microbial growth and substrate consumption, but it expresses the dependence of maintenance on both microbial biomass and substrate; (2) the maximum specific growth rate in the Herbert (μ(max,H)) is higher than those in the other two models (μ(max,P) and μ(max,C)), and the difference is the physiological maintenance factor (m(q) = a); and (3) the overall maintenance coefficient (m(T)) is more sensitive to m(q) than to the specific growth rate (μ(G)) and Y(G). Our critical reassessment of microbial maintenance provides a new approach for quantifying some important components in soil microbial ecology models.
我们试图通过理论重新评估来协调三种微生物维持模型（赫伯特、皮尔特和妥协）。我们提供了一个严格的证明，即真正的生长产率系数（Y(G)）是特定维持率（赫伯特中的 a）与维持系数（皮尔特中的 m）的比值。本研究的其他发现包括：（1）在计算微生物生长和基质消耗方面，妥协模型与赫伯特相同，但它表达了维持对微生物生物量和基质的双重依赖性；（2）赫伯特中的最大比生长速率（μ(max,H)）高于其他两个模型（μ(max,P)和 μ(max,C)），差异就是生理维持因子（m(q) = a）；（3）整体维持系数（m(T)）对 m(q)比比生长速率（μ(G)）和 Y(G)更敏感。我们对微生物维持的批判性重新评估为量化土壤微生物生态学模型中的一些重要成分提供了一种新方法。
