Browsing by Subject "Feedlot cattle"
Now showing 1 - 10 of 10
- Results Per Page
- Sort Options
Item 33rd Minnesota Nutrition Conference proceedings, Bloomington, September 18-19, 1972.(University of Minnesota)Item 33rd Minnesota Nutrition Conference, Bloomington, Minnesota, September 18-19, 1972. Saint Paul, MN : University of Minnesota, 1972.(University of Minnesota, 1972-09)Item 34th Minnesota Nutrition Conference, Bloomington, Minnesota September 17-18, 1973, Proceedings.(University of Minnesota, Institute of Agriculture, 1973-09)Item 56th Minnesota Nutrition Conference & Alltech, Inc. Technical Symposium, Proceedings, September 18-20, 1995, Bloomington, MN.(University of Minnesota: Dept. of Animal Science, Minnesota Extension Service, College of Veterinary Medicine, 1995)Item 57th Minnesota Nutrition Conference and Protiva Technical Symposium ; Proceedings(University of Minnesota, Dept. of Animal Science and Minnesota Extension Service., 1996-09-23)Item 58th Minnesota Nutrition Conference and BASF Technical Symposium, September 22-24, 1997, Bloomington, Minnesota(University of Minnesota, Dept. of Animal Science, 1997-09)Item Alternative feeds or feed additives in feedlot diets(2014-03) Compart, Devan Marie PaulusThree experiments were conducted to determine effects of feeding alternative feeds or feed additives to cattle consuming feedlot diets on diet digestibility, rumen fermentation, growth performance, and carcass characteristics. In the first experiment, effects of adding a Saccharomyces cerevisiae product (SC) to cattle fed feedlot diets on diet digestibility and rumen fermentation were examined. Results of the first experiment suggest that feeding 1.0 g SC/hd daily may result in improved rumen acetate: propionate ratio. However, feeding 1.0 g SC/hd daily reduced rumen VFA concentrations, NH3-N concentration, and pH. In the second experiment, effects of partially replacing steam flaked corn with soy glycerin and distillers grains on diet digestibility and rumen fermentation in cattle were examined. Feeding distillers grains resulted in increased rumen propionate, rumen branched-chain VFA, and total rumen VFA. Feeding glycerin resulted in increased rumen pH and rumen propionate, and decreased rumen acetate. Feeding distillers grains or glycerin caused a reduction in rumen acetate: propionate ratio. In the third experiment, effects of replacing dry rolled corn with either 20% full-fat distillers grains, or 20% or 47% reduced-fat distillers grains (equal fat concentration as inclusion of 20% full-fat distillers grains) on feedlot cattle growth performance and carcass characteristics were examined. Results from this experiment indicated that utilizing reduced-fat distillers grains in place of full-fat distillers grains or dry rolled corn does not impact animal growth performance or carcass characteristics.Item Degradable intake protein supplementation through the inclusion of urea in finishing diets containing distillers grains: effects on feedlot cattle performance, ruminal fermentation, and feed digestibility(2014-05) Ceconi, IreneDegradable intake protein (DIP) represents the proportion of protein that is potentially fermented in the rumen. Ruminal DIP balance is calculated by the difference between DIP supply and requirements. The former is a function of dry matter intake and dietary DIP, and represents nitrogen (N) available for synthesis of microbial crude protein (MCP), which is used as a measurement of microbial growth or production of new microbial cells. Synthesis of MCP basically requires ammonia-N (NH3-N), carbon skeletons, and energy. While the last two are mainly derived from fermentation of dietary carbohydrates, dietary N represents the main NH3-N source. Consequently, DIP requirements represent rumen-degradable N needs for MCP synthesis, and are a function of available fermentable carbohydrates. High dietary inclusion of grain as well as more extensive grain processing methods can result in increased ruminal availability of rapidly-fermentable carbohydrates, which in turn may result in increased DIP requirements. In addition, corn-based diets may not supply adequate amounts of DIP because corn protein is considered to be approximately 60% undegradable. Despite great protein content and because of great undegradable protein concentration, small to moderate dietary inclusion of corn distillers grains (DG) may also result in DIP deficit. Experiments 1 and 2 described in Chapter 2 evaluated the effect of adding urea, a highly rumen-degradable N source, to a high-concentrate, moderate-DG-containing diet on feedlot cattle performance, ruminal fermentation, and feed digestibility. Results from both experiments indicate that due to a DIP deficit generated by the un-supplemented diet, the addition of urea resulted in enhanced ruminal fermentation and feed digestibility, and consequently improved animal performance. Because rates of degradation of carbohydrates and conventional urea do not match, beneficial effects may arise from the use of slow-release urea (SRU) sources over conventional urea when added to DIP-deficient diets. Therefore, experiments 1 and 2 described in Chapter 3 evaluated the effect of increasing DIP concentration through the inclusion of one of two SRU sources in comparison with the inclusion of conventional urea in DG-containing feedlot diets on ruminal fermentation and feed digestibility. Likely due to lack of DIP deficit with the un-supplemented diet, results from these experiments do not demonstrate potential beneficial effects of SRU sources over conventional urea. Several confluent factors are discussed that may explain lack of need of urea supplementation in Chapter 3 experiments. Because previous studies have demonstrated improved ruminal fermentation, feed digestibility, and animal performance when supplementing conventional urea to rapidly-fermentable, moderate-DG-containing diets, more research is warranted to evaluate the use of SRU in diets for which a DIP deficit is expressed.Item Effect of Bambermycins and Level of Distillers Grains with Solubles on Performance and Carcass Characteristics of Feedlot Cattle.(University of Minnesota, Minnesota Extension Service, 2008-09) Lee, E.R.; Crawford, G.I.; Wertz-Lutz, A.E.; Rops, B.D.Item "Feeding to Meet Protein Fractions and Amino Acid Needs in Feedlot Cattle," 68th Minnesota Nutrition Conference and University of Minnesota Research Update Session: Modern Concepts in Livestock Production for 2007, Proceedings, September 18-19-2007, Minneapolis, Minnesota(University of Minnesota, 2007-09) DiCostanzo, A.