Intake, total-tract digestibility and methane emissions of Texel and Blackbelly sheep fed C4 and C3 grasses tested simultaneously in a temperate and a tropical area. (1st June 2018)

• Record Type: Journal Article
• Authors: Archimède, H.; Rira, M.; Eugène, M.; Fleury, J.; Lastel, M.L.; Periacarpin, F.; Silou-Etienne, T.; Morgavi, D.P.; Doreau, M.
• Is Part Of: Journal of cleaner production. Volume 185(2018)
• Page Start: 455
• Page End: 463
• Publication Date: 2018-06-01
• Subjects: Methane -- Digestibility -- Sheep breed -- Forages -- Tropical and temperate environment; B Blackbelly -- CH4 methane -- DMI DM intake -- GHGs Greenhouse gases -- LW Live weight -- T Texel; Factory and trade waste -- Management -- Periodicals; Manufactures -- Environmental aspects -- Periodicals; Déchets industriels -- Gestion -- Périodiques; Usines -- Aspect de l'environnement -- Périodiques; 628.5
• DOI: 10.1016/j.jclepro.2018.03.059
• Languages: English
• ISSNs: 0959-6526

Abstract

Abstract: This experiment was designed to better understand the differences in enteric methane (CH4 ) emissions of ruminants in tropical and temperate areas. Two double 4 × 4 Latin squares using adult sheep were evaluated simultaneously in a temperate and a tropical site. At each site, two breeds (four Texel, temperate origin, and four Blackbelly, tropical origin) and four hay types (two C3 grasses and two C4 grasses grown, respectively, in temperate and tropical sites) were tested. High-(H) and low-quality (L) grass hays were tested within each type of grass. No difference in dry matter (DM) intake (g/kg BW/d) was observed between sites. Intake of C4 grass was lower than that of C3 grass. A breed × site interaction was observed. In the tropical site, dry matter intake (g/kg BW/d) was higher in Blackbelly compared to Texel, whereas no difference was observed in the temperate site. The total-tract DM, OM (organic matter), NDF (neutral detergent fiber) and ADF (acid detergent fiber) digestibility values recorded in the temperate site were lower ( P < 0.01) than those reported in the tropical site. Methane yield (g/kg DM intake) was not affected by site, whereas a breed × site interaction was observed. In the tropical site, methane emission was lower for Blackbelly compared to Texel, whereas the opposite was observed in the temperate site. Differences in methane emissions between the temperate and tropical sites could only be the result of diet and breed interactions with the environment. Highlights: Strict comparison of methane emission has been made in a warm vs. temperate area. Methane emission is influenced by diet, breed and interactions with the environment. Grass physiology (tropical vs. temperate) and their maturity influence methane emission.