Journal
AGRONOMY-BASEL
Volume 10, Issue 7, Pages -Publisher
MDPI
DOI: 10.3390/agronomy10071024
Keywords
soil organic carbon; annual net primary productivity; community-weighted mean traits; functional diversity; leaf dry matter content
Categories
Funding
- Conseil Regional de Basse-Normandie
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Grassland management affects ecosystem services such as the conservation of C stocks. The aim of this study was to analyze the relation between vegetation production and soil C stocks for a set of seven temperate grasslands of various productivity levels. We estimated vegetation production directly through measurements of aboveground biomass (>5 cm), stubble and root biomass, and indirectly via plant community functioning. Soil C stocks were measured for bulk soil (organic C, SOC) and hot-water-extractable C (HWC) of topsoil. Plant community functioning was characterized by community-weighted mean ((CWM)) traits and functional diversity index. Results show a negative relation between biomass production and SOC(stock.)The tradeoff between productivity and SOC(stock)could be linked to plant community functioning and particularly Leaf Dry Matter content (LDMCCWM) which appeared to be the most relevant descriptor of plant community functioning. High SOC(stock)could be associated to low productivity, conservative strategy (high LDMCCWM), low soil labile C content and grassland age. Our results show a strong direct effect of management and grassland age on plant community, which in turn affects plant tissue quality and subsequent organic matter mineralization. Old permanent grasslands appeared less productive but represent an occasion for C storage and thus global change mitigation.
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