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Master Thesis

Application d'une méthode simplifiée en vue d'acquérir des références françaises d'émissions de gaz à effet de serre et d'ammoniac en bâtiments bovin laitier pour des conduites d'élevage contrastées

Abstract : Dairy cattle play a main role in the emission of some air pollutants, which is an increasing global concern today. Housing is a major source of emission and should be integrated into a broader environmental assessment. The objective of this study was to quantify emissions from dairy cattle buildings with a simplified method which has been developed to free oneself from the difficulty of measuring airflow rates in a naturally ventilated building. The aim was to acquire French emission references from different types of housing and contrasting livestock management systems. The results show that the housing system and its variable management according to the season are important criteria to consider in order to assess yearly emissions. Even if emissions of CO2 and CH4 are mainly due to the dairy cows, the presence of a deep litter seems to be an additional source of emission of greenhouse gases (5,6 and 4 kg C-CO2/UGB/day, 460 and 344 g C-CH4/UGB/day for buildings with a deep litter or free stalls respectively). Ammonia emissions seem to be also sensitive to manure management with increasing emissions for free stalls (29 g N-NH3/UGB/jour against 18,6 for a deep litter system). However, this work has also highlighted the limits of this approach and the need to clarify some points, like the calculation of carbon losses. Finally, emissions obtained at the building level will have to be considered in the broader context of the farming system.
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Master Thesis
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https://dumas.ccsd.cnrs.fr/dumas-00801807
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Charlène Javon. Application d'une méthode simplifiée en vue d'acquérir des références françaises d'émissions de gaz à effet de serre et d'ammoniac en bâtiments bovin laitier pour des conduites d'élevage contrastées. Sciences agricoles. 2012. ⟨dumas-00801807⟩

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