TY - JOUR

T1 - Microbial biomass, microbial diversity, soil carbon storage, and stability after incubation of soil from grass-clover pastures of different age

A1 - Müller-Stöver,Dorette Sophie

A1 - Hauggaard-Nielsen,Henrik

A1 - Eriksen,Jørgen

A1 - Ambus,Per

A1 - Johansen,Anders

AU - Müller-Stöver,Dorette Sophie

AU - Hauggaard-Nielsen,Henrik

AU - Eriksen,Jørgen

AU - Ambus,Per

AU - Johansen,Anders

PB - Springer

PY - 2012

Y1 - 2012

N2 - <p>A laboratory incubation study with clover grass pasture soils of seven different ages (0, 1, 2, 3, 4, 5, and 16 production years) was carried out to determine initial soil carbon (C) and nitrogen (N) stocks and potentials for greenhouse gas emissions (N₂O and CO₂). Compared with the soil from the recently established pasture, an increase of total soil C and N was observed along with pasture age. Greenhouse gas emissions were low and not significantly different among the soils from younger pastures (0-5 years), but especially N₂O emissions increased markedly in the soil from 16-year-old grass-clover. Low emissions might mainly be due to an early C limitation occurring in the soils from younger pastures, which was also corroborated by decreasing levels of cold water-extractable C and early shifts within the microbial community. However, higher emissions from the old pasture soil were offset by its increase in total soil C. A longer ley phase without soil disturbance may therefore be beneficial in terms of overall C sequestration in systems with temporary grass-clover swards.</p>

AB - <p>A laboratory incubation study with clover grass pasture soils of seven different ages (0, 1, 2, 3, 4, 5, and 16 production years) was carried out to determine initial soil carbon (C) and nitrogen (N) stocks and potentials for greenhouse gas emissions (N₂O and CO₂). Compared with the soil from the recently established pasture, an increase of total soil C and N was observed along with pasture age. Greenhouse gas emissions were low and not significantly different among the soils from younger pastures (0-5 years), but especially N₂O emissions increased markedly in the soil from 16-year-old grass-clover. Low emissions might mainly be due to an early C limitation occurring in the soils from younger pastures, which was also corroborated by decreasing levels of cold water-extractable C and early shifts within the microbial community. However, higher emissions from the old pasture soil were offset by its increase in total soil C. A longer ley phase without soil disturbance may therefore be beneficial in terms of overall C sequestration in systems with temporary grass-clover swards.</p>

KW - Soil

KW - Nitrous oxide emission

KW - Fumigation-extraction

KW - Organic-matter

KW - N2O emission

KW - Manure type

KW - Nitrate

KW - Cultivation

KW - Management

KW - Crop

KW - CO2

U2 - 10.1007/s00374-011-0633-6

DO - 10.1007/s00374-011-0633-6

JO - Biology and Fertility of Soils

JF - Biology and Fertility of Soils

SN - 0178-2762

IS - 4

VL - 48

SP - 371

EP - 383

ER -