Effects of different fresh-cut forages and their hays on feed intake, digestibility, heat production, and ruminal methane emission by Boer × Spanish goats

TitleEffects of different fresh-cut forages and their hays on feed intake, digestibility, heat production, and ruminal methane emission by Boer × Spanish goats
Publication TypeJournal Article
Year of Publication2012
AuthorsPuchala, R, Animut, G, Patra, AK, Detweiler, GD, Wells, JE, Varel, VH, Sahlu, T, Goetsch, AL
JournalJournal of Animal Science
Issue90
Start Page2754
Abstract

Twenty-four yearling Boer × Spanish wethers were used to assess effects of different forages, either fresh (Experiment 1) or as hay (Experiment 2), on feed intake, digestibilities, heat production, and ruminal methane emission. Treatments were (1) Sericea lespedeza (Lespedeza cuneata), a legume high in condensed tannins (CT; 20 and 15% in fresh forage and hay, respectively) (SER), (2) SER supplemented with polyethylene glycol (25 g/d) (SER-PEG), (3) alfalfa (Medicago sativa), a legume low in CT (ALF), and (4) sorghum-sudangrass (Sorghum bicolor), a grass low in CT (GRASS). Experiments were 22 d, which included 16 d for acclimatization followed by a 6-d period for fecal and urine collection and gas exchange measurement (last 2 d). Intake of OM was 867, 823, 694, and 691 g/d (SEM = 20.1) with fresh forage and 806, 887, 681, and 607 g/d with hay for SER, SER-PEG, ALF, and GRASS, respectively (SEM = 46.6). Apparent total tract N digestion was greater for SER-PEG vs. SER (P