Authors: Paul Blondiaux, Mohammed BenAouda, Maguy Eug?ne, Andr? Bannink, Global network partners Ceders Partners
Published in: CSBE-SCGAB Technical Conferences » 5th CIGR and AGM Quebec City 2021 » 4th international Symposium on Gas Emissions and Dust from Livestock (EMILI)
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Description: The consequences of using nutritional strategies to reduce emissions and other animal?s responses need to be evaluated jointly. In the present work, we assessed the impact of diet composition on methane yield (CH4,Y) and total, fecal and urinary nitrogen excretions yield (TNY, FNY and UNY). Data were collected from 133 in vivo studies (346 treatment means) with ruminants. Univariate and multivariate models were used to test the effects of ether extract (EE), starch (STA), fiber (NDF), crude protein (CP) dietary contents on CH4,Y, TNY, FNY and UNY. Univariate models indicated that an increase of EE and STA dietary content by 10 g /kg dry matter intake (DMI) decreased CH4,Y by 1.0 and 0.1 g/kg DMI, respectively, without affecting TNY, FNY and UNY. An increase of CP dietary content by 10 g/kg DMI increased TNY, FNY and UNY by 1.3, 0.4 and 0.9 g/kg DMI, respectively. An increase of feeding level (FL) by 10 g /kg body weight (BW) decreased TNY and UNY by 20.6 and 28.7 g/kg DMI, respectively. Whereas, it increased FNY by 4.2 g/kg DMI, indicating a shift from UNY towards FNY. Multivariate models indicated that CH4,Y and NY were best predicted by the percentage of concentrate (PCO) in the diet for bivariate and trivariate models and by STA content for bivariate model. There was a trade-off between CH4,Y and TNY, PCO decreased CH4,Y whereas it increased TNY. Diet can reduce CH4,Y and TNY as a synergistic effect, but probably requiring a careful balancing of nutrition.
Conference name: 5th CIGR International Conference and CSBE-SCGAB AGM 2021, Quebec City,QC, 11-14 May 2021.
Session name: 4th international Symposium on Gas Emissions and Dust from Livestock (EMILI) 4 - Mitigation Strategies
Publication type: Presentation
Language 1: en
Rights: Canadian Society for Bioengineering