Effect of sterilization on mineralization of straw and black carbon
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Effect of sterilization on mineralization of straw and black carbon. / Bobul'ská, Lenka; Bruun, Sander; Fazekašová, Danica.
In: Fresenius Environmental Bulletin, Vol. 22, No. 6, 2013, p. 1727-1730.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Effect of sterilization on mineralization of straw and black carbon
AU - Bobul'ská, Lenka
AU - Bruun, Sander
AU - Fazekašová, Danica
PY - 2013
Y1 - 2013
N2 - The study was aimed at investigating the role of microorganisms in the degradation of BC (black carbon). CO evolution was measured under sterilized and non-sterilized soil using BC and straw amendments. Black carbon and straw were produced from homogenously C labelled roots of barley (Hordeum vulgare) with a specific activity 2.9 MBq g C. Production of BC was implemented at 300 °C for 24 h in a muffle oven, incubated in soil and C in the evolved CO was measured after 0.5, 1, 2, 4, 8, 16, 26 and 40 days. BC showed much lower and slow evolution of CO than the plant material which refers to high resistance of BC to microbial degradation. The difference between soil respiration in sterilized and non-sterilized soil with plant material was visible from the beginning of the experiment, unlike with BC amendments where differences only occurred after some days. In addition, the CO evolution from the plant material proceeded with a lag phase while CO evolution from the charcoals showed no lag phase. This indicates that microorganisms are not involved in the initial flush of carbon emitted from the BC. We suggest that an alternative source may be carbonates on the surfaces of the BC, but another abiotic source must also be present perhaps abiotic mineralization of labile BC components.
AB - The study was aimed at investigating the role of microorganisms in the degradation of BC (black carbon). CO evolution was measured under sterilized and non-sterilized soil using BC and straw amendments. Black carbon and straw were produced from homogenously C labelled roots of barley (Hordeum vulgare) with a specific activity 2.9 MBq g C. Production of BC was implemented at 300 °C for 24 h in a muffle oven, incubated in soil and C in the evolved CO was measured after 0.5, 1, 2, 4, 8, 16, 26 and 40 days. BC showed much lower and slow evolution of CO than the plant material which refers to high resistance of BC to microbial degradation. The difference between soil respiration in sterilized and non-sterilized soil with plant material was visible from the beginning of the experiment, unlike with BC amendments where differences only occurred after some days. In addition, the CO evolution from the plant material proceeded with a lag phase while CO evolution from the charcoals showed no lag phase. This indicates that microorganisms are not involved in the initial flush of carbon emitted from the BC. We suggest that an alternative source may be carbonates on the surfaces of the BC, but another abiotic source must also be present perhaps abiotic mineralization of labile BC components.
M3 - Journal article
AN - SCOPUS:84880056882
VL - 22
SP - 1727
EP - 1730
JO - Fresenius Environmental Bulletin
JF - Fresenius Environmental Bulletin
SN - 1018-4619
IS - 6
ER -
ID: 102241108