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Full-Text Articles in Animal Sciences
Changes In Corn Residue Quality Throughout The Grazing Period And Effect Of Supplementation Of Calves Grazing Corn Residue, Amanda J. Burken
Changes In Corn Residue Quality Throughout The Grazing Period And Effect Of Supplementation Of Calves Grazing Corn Residue, Amanda J. Burken
Department of Animal Science: Dissertations, Theses, and Student Research
Corn residue is an abundant feed source in Nebraska that can be utilized as an alternative winter feed. Calves were backgrounded on corn residue in order to determine gain and estimate forage intake when supplemented with distillers grains (DGS). Calves grazing the non-irrigated field gained more (1.03 kg/calf daily) when compared to those grazing the irrigated field (0.90 kg/calf daily; P < 0.01). In year 1, a quadratic effect for intake of DGS was present (P < 0.01) while year 2 observed a linear effect for increasing level of DGS (P < 0.01). The nutritional quality of corn residue was evaluated over time in order to determine changes in blade/sheath, cob, husk/shank and stem. Minimal changes in DM of the forage components occurred was grain reached 15.5% moisture. Digestibility of the blade/sheath declined linearly over time (P < 0.01) while the husk remained constant (P = 0.40). Cob digestibility decreased quadratically (P < 0.01) throughout the sampling period with few changes once grain reached 15.5% moisture. Differences observed in the digestibility of the blade/sheath were attributed to the effects of weathering. A third set of trials was conducted to evaluate the effects of by-product supplementation of calves grazing irrigated corn residue and supplemented with DGS or continuous access to lick tubs. The DGS treatment gained more (0.62 kg/calf daily) than the lick tub treatment (0.38 kg/calf daily; P < 0.01). Calves offered DGS consumed more supplement as a percentage of BW (0.52%) when compared with calves offered lick tubs (0.36%; P < 0.01) on a DM basis. Calves supplemented with DGS had a higher supplement efficiency (46.3% to 42.9%, DM basis) although no differences were present between treatments (P = 0.49). When analyzed on an OM basis, however, calves offered lick tubs had a numerically higher supplement efficiency (50.4%) in comparison to calves …
Determining Forage Intake Of Nursing Calves Grazing Native Sandhills Rangeland, Jennifer A. Walker
Determining Forage Intake Of Nursing Calves Grazing Native Sandhills Rangeland, Jennifer A. Walker
Department of Animal Science: Dissertations, Theses, and Student Research
Effective management of grazing lands is important for longevity and productivity. Accurate calculations of stocking rates per animal unit will aid in long term sustainability. Calculating stocking rates for cattle can prove challenging for cows and nursing calves. Limited research has been conducted to determine forage intake of the nursing calf pre-weaning. The objective of Trial 1 was to determine nursing calf forage intake over time until weaning. Trial 1 used 8 crossbred cow-calf pairs in experiment 1 and 12 pairs in experiment 2. Pairs were separated into two groups rotating between grazing upland range or housed in individual pens …
Technical Note: Estimating Beef-Cattle Forage Demand: Evaluating The Animal Unit Concept, T. L. Meyer, L. A. Stalker, J. D. Volesky, D. C. Adams, R. N. Funston, T. J. Klopfenstein, Walter H. Schacht
Technical Note: Estimating Beef-Cattle Forage Demand: Evaluating The Animal Unit Concept, T. L. Meyer, L. A. Stalker, J. D. Volesky, D. C. Adams, R. N. Funston, T. J. Klopfenstein, Walter H. Schacht
Department of Animal Science: Faculty Publications
The objective of this experiment was to evaluate the effect of BW and physiological status of a beef animal on forage intake. The experiment was repeated over 2 yr with 6 replications of 3 treatments per year: cow-calf pair (CCP, BW = 629 kg), nonlactating cow (NLC, BW = 503 kg), and yearling steer (YS, BW = 305 kg). The CCP was treated as one unit, with the sum of cow BW and calf BW comprising CCP BW. Calves averaged 42 d of age and 73 kg at the start of the experiment each year. Animals were housed in individual …
Replacement Of Grazed Forage With Wdgs And Poor Quality Hay And Straw Mixtures, Sandra B. Villasanti
Replacement Of Grazed Forage With Wdgs And Poor Quality Hay And Straw Mixtures, Sandra B. Villasanti
Department of Animal Science: Dissertations, Theses, and Student Research
A grazing study was conducted at the University of Nebraska Gudmundsen Sandhills Laboratory from mid-June to late-August across two years (2009 and 2010) to evaluate the effects of supplementation with mixtures of wet distillers grains (WDGS) and straw or hay on grazed forage intake. Twenty 1 ha paddocks replicated over two blocks were randomly assigned to one of four treatments: Control (CON) at the recommended stocking rate (1.68 AUM/ha in 2009 and 1.64 AUM/ha in 2010), and three double stocked treatments supplemented with 60% straw and 40% WDGS (STRAW), 60% hay and 40% WDGS (LOW), and 70% hay and 30% …
Estimating Livestock Forage Demand: Defining The Animal Unit, Tonya L. Meyer
Estimating Livestock Forage Demand: Defining The Animal Unit, Tonya L. Meyer
Department of Animal Science: Dissertations, Theses, and Student Research
The objective of this experiment was to evaluate the effect of a beef animal’s physiological status on forage intake. The experiment was repeated over two years with six replications of three treatments per year: cow-calf pair (CC; BW = 629 kg), dry cow (DC; BW = 503 kg), and yearling steer (S; BW = 305 kg). The cow and calf were treated as one unit, with cow BW and calf BW comprising CC BW. Calves were approximately 42 d of age and weighing 73 kg at the start of each year. Animals were housed in individual pens and fed high …
Effects Of Dried Distillers Grains And Equivalent Undegradable Intake Protein Or Ether Extract On Performance And Forage Intake Of Heifers Grazing Smooth Bromegrass Pastures, J. C. Macdonald, Terry J. Klopfenstein, Galen E. Erickson, W. A. Griffin
Effects Of Dried Distillers Grains And Equivalent Undegradable Intake Protein Or Ether Extract On Performance And Forage Intake Of Heifers Grazing Smooth Bromegrass Pastures, J. C. Macdonald, Terry J. Klopfenstein, Galen E. Erickson, W. A. Griffin
Department of Animal Science: Faculty Publications
Crossbred heifers (n = 120; BW = 368 kg, SD = 39 kg) were used to determine effects of dried distillers grains (DDG) and relative contributions of undegradable intake protein (UIP) and fat (ether extract, EE) in DDG on ADG and forage intake (FI). Heifers rotationally grazed six 3.5-ha, smooth bromegrass paddocks (IVDMD = 65.7%, CP = 20.8%, UIP = 2.17%, DM basis). Heifers were blocked by previous ADG and allotted to treatments in a 3 × 3 + 1 factorial design. Factors were source and level of supplementation. Supplements were as follows: 1) DDG (UIP = 15.8%, EE = …