The conservation of secondary grasslands enhances biodiversity and the provisioning of different types of Ecosystem Services. Soil contribution to greenhouse gases (GHG) emissions has been much studied but there are still uncertainties on how different land-use and management affect global warming. This study aims to assess the effect of different management on soil CO2 emissions in a Bromus erectus-dominated grassland (central Apennines, 900 m a.s.l.). A randomized block design experiment was established to test three different treatments: (1) customary management (mowing in early July followed by a simulated grazing in November), (2) customary management and N-fertilization (100 kg ha-1 yr-1), and (3) control (abandonment). This paper reports and discusses the CO2 emission dynamics of the grassland under the different management from May to November 2016. The results showed that mowing significantly reduced soil respiration (Rs) between the end of July and the first half of August, while fertilization did not significantly affect Rs. The control showed a significant exponential relationship between Rs and soil temperature, which explained 77% of the seasonal variation. In contrast, both treatments (1) and (2) showed very low relationship between Rs and soil temperature due to the disturbances of the management practices.
Soil respiration of permanent grassland under different management in central Apennines / Trozzo, L.; Francioni, M.; Tesei, G.; Budimir, K.; Papaveri, Alessio; Barbetti, Loris; Allegrezza, M.; KISHIMOTO-MO, A. W.; D’Ottavio, P.; Toderi, M.. - STAMPA. - 22:(2017), pp. 627-629. (Intervento presentato al convegno Grassland resources for extensive farming systems in marginal lands: major drivers and future scenarios tenutosi a Alghero nel 7-10 May 2017).