A study on feeding ammoniated and processed barley to feedlot steers |
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| Affiliation: | 1. Department of Radiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430022, China;2. Hubei Province Key Laboratory of Molecular Imaging, Wuhan, 430022, China;3. Department of Obstetrics and Gynecology, Wuhan Children''s Hospital (Wuhan Maternal and Child Healthcare Hospital), Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430015, China;1. Department of Biological Sciences, Boise State University, Boise, ID, USA;2. School of Natural Resources and Environment, University of Michigan, Ann Arbor, MI, USA;1. Center for Energy, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India;2. Department of Chemical Engineering, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India;3. Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati 781 039, Assam, India;4. Department of Molecular Biology and Biotechnology, Tezpur University, Napaam, Tezpur 784028, Assam, India;1. Department of Invertebrate Zoology, Biological Faculty, Lomonosov Moscow State University, Leninskie Gory, 1-12, Moscow 119992, Russia;2. Taxonomy and Systematics Group, Naturalis Biodiversity Center, P.O. Box 9517, 2300 RA Leiden, The Netherlands;3. Red Sea Research Center, Biological and Environmental Science and Engineering Division, King Abdullah University of Science and Technology, Thuwal 23955-6900, Saudi Arabia;4. A.N. Belozersky Institute of Physico-chemical Biology, Lomonosov Moscow State University, Moscow 119991, Russia;5. National Research Council of Italy, Institute of Ecosystem Study, Largo Tonolli 50, 28922 Verbania Pallanza, Italy;1. Nofima, Norwegian Institute of Food, Fisheries and Aquaculture, Osloveien 1, 1430 Ås, Norway;2. Department of Animal and Aquacultural Sciences, Norwegian University of Life Science, Ås, Norway;3. Department of Plant and Environmental Sciences, Norwegian University of Life Science, Ås, Norway;4. Bioforsk Øst, Apelsvoll, Norwegian Institute for Agricultural and Environmental Research, Arable Crops Division, Kapp, Norway |
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| Abstract: | A total of 120 commercial crossbred steer calves (284±1.9 kg) were allocated in a 2×2 arrangement to two barley processing methods; whole (W) or rolled (R) barley and two ammoniation treatments; ammoniated (A) or non-ammoniated (N) barley. Steers were randomly allocated to twelve pens with 10 steers per pen and 3 pens (replications) per diet. The study was divided into two stages, growing (0–84 day) and finishing (85–196 day). Average daily gain (ADG) for the overall 196 day period was affected by processing (p<0.01) averaging 1.10 and 1.20 kg day−1 for steers on W and R barley, respectively. Steers on the R barley gained 19.6% more than those on W barley during the growing stage and 0.8% more during the finishing stage. There was a trend towards an improvement (p=0.06) in overall ADG by ammoniation. The ADG of steers was significantly higher (p<0.01) during the finishing (1.22 kg day−1) than during the growing (1.06 kg day−1) stage. Feed efficiency was better with R than with W barley (6.8 vs. 7.7; p=0.02). Processing and ammoniation had no effect (p>0.05) on carcass traits or grades. |
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