Microbial decomposition of skeletal muscle tissues (Ovis aries) in a sandy loam soil at different temperatures

D.O. Carter, Mark Tibbett

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    63 Citations (Scopus)

    Abstract

    A laboratory experiment was conducted to determine the effect of temperature (2, 12, 22 degrees C) on the rate of aerobic decomposition of skeletal muscle tissue (Ovis aries) in a sandy loam soil incubated for a period of 42 days. Measurements of decomposition processes included skeletal muscle tissue mass loss, carbon dioxide (CO2) evolution, microbial biomass, soil pH, skeletal muscle tissue carbon (C) and nitrogen (N) content and the calculation of metabolic quotient (qCO(2)). Incubation temperature and skeletal muscle tissue quality had a significant effect on all of the measured process rates with 2 degrees C usually much lower than 12 and 22 degrees C. Cumulative CO2 evolution at 2, 12 and 22 degrees C equaled 252, 619 and 905 mg CO2, respectively. A significant correlation (P < 0.001) was detected between cumulative CO2 evolution and tissue mass loss at all temperatures. Q(10)s for mass loss and CO2 evolution, which ranged from 1.19 to 3.95, were higher for the lower temperature range (Q(10)(2-12 degrees C) > Q(10)(12-22 degrees C)) in the Ovis samples and lower for the low temperature range (Q(10)(2-12 degrees C) < Q(10)(12-22 degrees C)) in the control samples. Metabolic quotient and the positive relationship between skeletal muscle tissue mass loss and cumulative CO2 evolution suggest that tissue decomposition was most efficient at 2 degrees C. These phenomena may be due to lower microbial catabolic requirements at lower temperature. (c) 2005 Elsevier Ltd. All rights reserved.
    Original languageEnglish
    Pages (from-to)1139-1145
    JournalSoil Biology and Biochemistry
    Volume38
    Issue number5
    DOIs
    Publication statusPublished - 2006

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