Measurement of Methane and Ammonia Emissions from Compost-Bedded Pack Systems in Dairy Barns: Tilling Effect and Seasonal Variations
2023
Fuertes Gimeno, Esperanza | Balcells Terés, Joaquim | Maynegre Santaulària, Jordi | de la Fuente Oliver, Gabriel | Sarri Espinosa, Laura | Seradj, Ahmad Reza
Dairy cattle contribute to environmental harm as a source of polluting gas emissions, mainly of enteric origin, but also from manure management, which varies among housing systems. Compost-bedded pack systems use manure as bedding material, which is composted in situ daily. As current literature referring to their impact on NH3 and CH4 emissions is scarce, this study aims to characterize the emissions of these two gases originating from three barns of this system, differentiating between two emission phases: static emission and dynamic emission. In addition, the experiment differentiated emissions between winter and summer. Dynamic emission, corresponding to the time of the day when the bed is being composted, increased over 3 and 60 times the static emission of NH3 and CH4, respectively. In terms of absolute emissions, both gases presented higher emissions during summer (1.86 to 4.08 g NH3 m−2 day−1 and 1.0 to 4.75 g CH4 m−2 day−1 for winter and summer, respectively). In this way, contaminant gases produced during the tilling process of the manure, especially during the warmer periods of the year, need to be taken into account as they work as a significant factor in emissions derived from compost-bedded pack systems.
Show more [+] Less [-]This research was mainly funded by Generalitat de Catalunya, Department of Agriculture, Livestock, Fisheries, and Food (S-18017). Esperanza Fuertes is the recipient of a grant from Agencia de Gestión de Ayudas Universitarias y de Investigación of Spain (FI-SDUR 2020/00031) as well as currently receiving Investigo Programme funding (2022 INV-1 00010).
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