| Title: | "Intake, ruminal fermentation parameters, and apparent total-tract digestibility by beef steers consuming Pensacola bahiagrass hay treated with calcium oxide" |
| Author(s): | Ciriaco FM; Henry DD; Schulmeister TM; Sanford CD; Canal LB; Fontes PLP; Oosthuizen N; Dubeux JCB; Lamb GC; DiLorenzo N; |
| Address: | "North Florida Research and Education Center, University of Florida, Marianna, FL 32446-7906, USA. Department of Animal and Dairy Science, University of Georgia, Tifton, GA 31793-5766, USA. Department of Animal and Range Sciences, Montana State University, Bozeman, MT 59717-2900, USA. Department of Animal and Dairy Science, University of Georgia, Athens, GA 30602-1506, USA. Department of Animal Science, Texas A&M University, College Station, TX 77843-2471, USA" |
| ISSN/ISBN: | 1525-3163 (Electronic) 0021-8812 (Print) 0021-8812 (Linking) |
| Abstract: | "To determine the effect of CaO-treated Pensacola bahiagrass (Paspalum notatum) hay on intake, ruminal fermentation parameters, and apparent total-tract digestibility of nutrients, nine ruminally cannulated Angus-crossbred steers were used in a triplicated 3 x 3 Latin square design. Steers had ad libitum access to either 1) untreated dry hay (DH; n = 8); 2) hay at 50% DM treated with 8.9% CaCO3 (dry matter [DM] basis; CC; n = 9); or 3) hay at 50% DM treated with 5% CaO (DM basis; CO; n = 8). Water was added to reach 50% DM in the CC and CO diets. Ruminal fluid and blood samples were collected every 3 h for 24 h. Ruminal fluid was analyzed for pH, volatile fatty acids (VFA), and ammonia-nitrogen (NH3-N). Blood was analyzed for plasma urea nitrogen (PUN). Hay and fecal samples were collected for 4 d, four times daily for hay and twice daily for feces, to determine apparent total-tract digestibility of nutrients. The hay provided to steers during the digestibility period was analyzed for in vitro organic matter digestibility (IVOMD) for 48 h. Data were analyzed as repeated measures for blood and ruminal fermentation parameters. Total DM intake was not affected (P >/= 0.674) by treatment. A treatment effect (P < 0.001) was observed for average ruminal pH, where steers consuming CO had the greatest pH (P < 0.001). Ruminal concentration of NH3-N tended (P = 0.059) to be reduced in steers consuming CO. There was a treatment x time interaction (P = 0.023) on concentrations of PUN, where at 3 h DH and CO were lesser than CC (P |
| Keywords: | Animal Feed/analysis Animals Calcium Compounds Cattle Diet/veterinary Dietary Supplements Digestion Fermentation Oxides *Paspalum Rumen/metabolism alkali treatment beef steers in vitro organic matter digestibility poor-quality forage ruminal fermentation; |
| Notes: | "MedlineCiriaco, Francine M Henry, Darren D Schulmeister, Tessa M Sanford, Carla D Canal, Luara B Fontes, Pedro L P Oosthuizen, Nicola Dubeux, Jose C B Lamb, G Cliff DiLorenzo, Nicolas eng 2021/12/18 J Anim Sci. 2022 Feb 1; 100(2):skab366. doi: 10.1093/jas/skab366" |
