Theses and Dissertations at Montana State University (MSU)
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Item Corn versus barley in beef cattle finishing diets: effect on steer performance, feeding behavior, and ruminal environment(Montana State University - Bozeman, College of Agriculture, 2021) DelCurto-Wyffels, Hannah Margaret; Chairperson, Graduate Committee: Megan Van Emon; Julia M. Dafoe, Cory T. Parsons, Darrin L. Boss, Timothy DelCurto, Samuel A. Wyffels, Megan L. Van Emon and Janice G. P. Bowman were co-authors of the article, 'Corn versus barley in finishing diets: effect on steer performance and feeding behavior' in the journal 'Animals' which is contained within this dissertation.; Julia M. Dafoe, Cory T. Parsons, Darrin L. Boss, Timothy DelCurto, Samuel A. Wyffels, Megan L. Van Emon and Janice G. P. Bowman were co-authors of the article, 'The influence of environmental conditions on intake behavior and activity by feedlot steers fed corn or barley-based diets' in the journal 'Animals' which is contained within this dissertation.; Hannah M. DelCurto-Wyffels, Julia M. Dafoe, Cory T. Parsons, Darrin L. Boss, Timothy DelCurto, Samuel A. Wyffels, Megan L. Van Emon and Janice G. P. Bowman were co-authors of the article, 'Diurnal ruminal pH and temperature patterns of steers fed corn or barley-based finishing diets' in the journal 'Animals' which is contained within this dissertation.While corn is the most common feed ingredient in the United States, barley, which is more suitable for the growing and climatic conditions at northern latitudes, can be a common feed alternative to corn. The different digestive utilization of unique feedstuffs coupled with extreme environmental conditions can pose challenges to efficiently feeding cattle in different climates. Thus, to further our understanding of the use of barley in feedlot diets at northern latitudes this study evaluated the effects of barley and corn finishing rations on feedlot performance, feeding behavior, and ruminal environment. For two consecutive years, Angus-based yearling steer calves were fed in a feedlot trial (427.3 + or - 3.7 kg; n = 48 in year 1, and 406.8 + or - 3.4 kg; n = 47 in year 2). Steers were randomly assigned to one of two primary basal grain dietary treatments: 1) Number 2 feed corn or 2) Hockett barley. Steers were fed in a GrowSafe system to measure individual animal intake and behavior throughout the duration of the study. Twelve steers per treatment group for each year of the study were also fitted with a HOBO pendent G accelerometer to measure activity and a SmaXtec ruminal bolus for continuous rumen monitoring of temperature and pH. Limited differences were observed in regard to performance and eating behavior of steers fed corn or barley-based diets. The steer's diet interacted with short term environmental changes to influence animal feeding behavior, but diet had limited impact on cattle lying activity. Continuous ruminal monitoring revealed average daily ruminal pH and temperature were not impacted by diet; however, diet did affect daily variation in ruminal pH and temperature. Intake patterns were also different between corn and barley-fed steers in which corn-fed steers consumed more feed the first 6 hours directly after feeding while barley-fed steers consumed more feed later in the day. Presumably, these intake patterns could be influenced by differences in diurnal patterns of ruminal pH between corn and barley. Depending on cost and production year, both barley and corn can be high quality feedstuffs to use in beef cattle finishing rations.Item Nutritional evaluation of 2-rowed barleys selected for high-lysine(Montana State University - Bozeman, College of Agriculture, 1976) Stutz, Duane KipItem Chemical characterization and metabolic function of soluble dietary fiber from select milling fractions of a hull-less barley and its waxy starch mutant(Montana State University - Bozeman, College of Agriculture, 1990) Mori, TheodoreItem A nutritional evaluation of four Betzes barley isogenes influenced by length of awn and presence or absence of hulls(Montana State University - Bozeman, College of Agriculture, 1980) Truscott, Doreen RaeItem Effect of barley preparation and roughage level upon the performance of fattening steers(Montana State University - Bozeman, College of Agriculture, 1962) Myers, Lyle LeslieItem The inclusion of high levels of barley in rations for dairy cows and calves(Montana State University - Bozeman, College of Agriculture, 1977) Prier, Steven GeorgeItem Feed quality of two recombinant inbred barley lines, LB6 and LB57, from a Lewis x Baronesse cross(Montana State University - Bozeman, College of Agriculture, 2000) Blackhurst, Travis CraigItem Influence of genotype on in vitro dry matter disappearance rate, estimated microbial yield and in vivo digestive physiology of barley(Montana State University - Bozeman, College of Agriculture, 1991) Kemalyan, Ruth EllenItem The influence of extrusion processing on the nutritional value of barley for weanling pigs and broiler chickens(Montana State University - Bozeman, College of Agriculture, 1987) Heryford, Annette GaleItem Effect of addition of amino acids to barley rations for rats and swine(Montana State University - Bozeman, College of Agriculture, 1962) Davidson, Richard M.
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