Effect of in-situ aged and fresh biochar on soil hydraulic conditions and microbial C use under drought conditions
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Effect of in-situ aged and fresh biochar on soil hydraulic conditions and microbial C use under drought conditions. / Paetsch, Lydia; Mueller, Carsten W.; Kögel-Knabner, Ingrid; Von Lützow, Margit; Girardin, Cyril; Rumpel, Cornelia.
In: Scientific Reports, Vol. 8, No. 1, 6852, 2018.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Effect of in-situ aged and fresh biochar on soil hydraulic conditions and microbial C use under drought conditions
AU - Paetsch, Lydia
AU - Mueller, Carsten W.
AU - Kögel-Knabner, Ingrid
AU - Von Lützow, Margit
AU - Girardin, Cyril
AU - Rumpel, Cornelia
PY - 2018
Y1 - 2018
N2 - Biochar (BC) amendments may be suitable to increase the ecosystems resistance to drought due to their positive effects on soil water retention and availability. We investigated the effect of BC in situ ageing on water availability and microbial parameters of a grassland soil. We used soil containing 13C labeled BC and determined its water holding capacity, microbial biomass and activity during a 3 months incubation under optimum and drought conditions. Our incubation experiment comprised three treatments: soil without BC (Control), soil containing aged BC (BCaged) and soil containing fresh BC (BCfresh), under optimum soil water (pF 1.8) and drought conditions (pF 3.5). Under optimum water as well as drought conditions, soils containing BC showed higher soil organic carbon (SOC) mineralization as compared to control soil. Moreover, BC effects on the soil water regime increase upon in situ aging. Native SOC mineralization increased most for soils containing BCaged. The BCaged led to improved C use under drought as compared to the other treatments. We conclude that BC addition to soils can ameliorate their water regime, especially under drought conditions. This beneficial effect of BC increases upon its aging, which also improved native substrate availability.
AB - Biochar (BC) amendments may be suitable to increase the ecosystems resistance to drought due to their positive effects on soil water retention and availability. We investigated the effect of BC in situ ageing on water availability and microbial parameters of a grassland soil. We used soil containing 13C labeled BC and determined its water holding capacity, microbial biomass and activity during a 3 months incubation under optimum and drought conditions. Our incubation experiment comprised three treatments: soil without BC (Control), soil containing aged BC (BCaged) and soil containing fresh BC (BCfresh), under optimum soil water (pF 1.8) and drought conditions (pF 3.5). Under optimum water as well as drought conditions, soils containing BC showed higher soil organic carbon (SOC) mineralization as compared to control soil. Moreover, BC effects on the soil water regime increase upon in situ aging. Native SOC mineralization increased most for soils containing BCaged. The BCaged led to improved C use under drought as compared to the other treatments. We conclude that BC addition to soils can ameliorate their water regime, especially under drought conditions. This beneficial effect of BC increases upon its aging, which also improved native substrate availability.
U2 - 10.1038/s41598-018-25039-x
DO - 10.1038/s41598-018-25039-x
M3 - Journal article
C2 - 29717234
AN - SCOPUS:85046347220
VL - 8
JO - Scientific Reports
JF - Scientific Reports
SN - 2045-2322
IS - 1
M1 - 6852
ER -
ID: 238951505