Calorimetric determination of metabolic heat, CO2 rates and the calorespirometric ratio of soil basal metabolism

被引：29

作者：

Barros, Nieves ^{[1
]}

Feijoo, Sergio ^{[1
]}

Hansen, Lee D. ^{[2
]}

机构：

[1] Univ Santiago de Compostela, Dept Appl Phys, Santiago De Compostela 15782, Spain

[2] Brigham Young Univ, Dept Chem & Biochem, Provo, UT 84602 USA

来源：

GEODERMA | 2011年 / 160卷 / 3-4期

关键词：

Calorimetry; Metabolic heat rate; CO2 production rate; Calorespirometric ratio; Soils; MICROBIAL BIOMASS; CARBON; TEMPERATURE; SENSITIVITY; TURNOVER;

D O I：

10.1016/j.geoderma.2010.11.002

中图分类号：

S15 [土壤学];

学科分类号：

0903 ; 090301 ;

摘要：

Characterizing soil metabolism requires measurement of the CO2 production rate or metabolic heat rate. While a single rate provides information on how rapidly substrates are being metabolized, the ratio of metabolic heat rate to CO2 production rate provides information on the nature of the substrates and the biochemical reactions taking place in the soil. Methodology to simultaneously monitor metabolic heat and CO2 production rates of soil basal metabolism by calorimetry is described. Plots of metabolic heat and CO2 rates against time for thirteen soil samples collected along a transect in northern Spain are presented. The ratio of metabolic heat rate to CO2 production rate showed degradation of carbohydrates through aerobic respiration in some of the samples and informed about the nature of the organic matter being degraded in all of them. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：542 / 547

页数：6

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