HVEVQ2PM

2768

6 janvier 2021 16:24

3 mars 2021 09:00

The diversity of beef cattle production systems in terms of diet, manure management and building design results in variation in greenhouse gas (GHG) emissions and the opportunities to reduce them. Within this context, we studied the effect of the varying proportions of concentrate (37–85% of DM) in the diet of Belgian Blue heifers on CH4 and N2O emissions from a tie-stall system (barn and solid manure storage). Trials were conducted over two consecutive periods in which manure was stored mainly in winter and spring. Increasing the proportions of concentrate in the diet reduced the GHG (CH4+N2O) emissions from the barns from 8.5±1.6 to 1.9±0.4kgCO2eq/kg live-weight gain, but had not significant influence on the emissions from the stored solid manure. Seasonal variation in gas emissions was observed, with lower emissions from stored solid manure in winter than in spring (159±25 and 314±49mg CO2, 0.14±0.02 and 2.47±0.78mg CH4, and <0.01 and 0.24±0.09mgN2O/kg of fresh manure stored/d of storage, respectively), indicating that manure storage in the warmer season should be avoided. The GHG (CH4+N2O) emissions from stored solid manure, however, were less than 11% of the total emissions (barns+manure storage). The emphasis in these systems should therefore be on modelling and reducing direct CH4 emissions from cattle but feed production impact should also be included. The GHG emissions were validated using nutrient (C, K, P and ash) balances including CO2 and CH4 emissions for the C balance.

None

• AB - Utile à l'AB
• CRA-W
• FREDO alimentation animale
• FREDO effluents et litière
• FREDO environnement
• FREDO machine, bâtiment et infrastructure
• GEO Belgique
• GEO Wallonie

• animal building
• beef heifers
• greenhouse gas emissions
• manure storage
• nutrient cycle
• solid manure

Agriculture, Ecosystems & Environment

148

134-144

February 15, 2012

15 février 2012

10.1016/j.agee.2011.11.012 Le DOI est une URL unique de référencement d'une publication. Il est donc plus fiable et permanent qu'une URL classique

0167-8809 L’ISSN est un code de 8 chiffres servant à identifier les journaux, revues, magazines, périodiques de toute nature et sur tous supports, papier comme électronique.