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Master Thesis

Intérêt d'un système de raclage à plat pour les émissions gazeuses, les performances, le bien-être et la santé des porcs en engraissement

Abstract : The new fattening building of the Trinottières experimental station is equipped with a flat scraper. 3 batches of 240 pigs were monitored concerning the scraping frequency between December and August 2019 : the control rooms that are supposed to mimic a stored slurry system were scraped once a day and the treatment rooms were scraped 7 times a day. No difference between the two types of rooms were observed concerning the productive performances that were very good in both cases (feed conversion ratio of 2,53 and growth rate > 884 g/d). Respiratory lesions notes (pneumonia, rhinitis) were conducted at the slaughterhouse and cough and sneeze were counted twice a week in each room. In both cases the scrapping frequency had no influence on the results. Body lesions were observed twice during the fattening period and have shown that ear lesions are significantly reduced in the treatment rooms compared to the control rooms in the early fattening (0,05 vs. 0,16/3, p<0,001). In the late fattening the tail lesions are reduced in the treatment rooms (0,54 vs 0,67/3, p<0,01). Ammonia concentration in the rooms were monitored to calculate the emissions. For the winter batch, the ammonia emissions were reduced of 22% in the treatment rooms compared to the control rooms. These results were confirmed for batch 3 (-12,5%) but not for batch 2.
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https://dumas.ccsd.cnrs.fr/dumas-02371682
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Submitted on : Wednesday, November 20, 2019 - 8:48:47 AM
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2019_Pype_Elise_SIPA.pdf
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  • HAL Id : dumas-02371682, version 1

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Élise Pype. Intérêt d'un système de raclage à plat pour les émissions gazeuses, les performances, le bien-être et la santé des porcs en engraissement. Sciences du Vivant [q-bio]. 2019. ⟨dumas-02371682⟩

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