Grazing System Effects on Cattle Diet Composition in the Nebraska Sandhills PDF Download
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Author: Paul Reinhold Schroeder
Publisher:
ISBN:
Category : Cattle
Languages : en
Pages : 168
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Book Description
Author: Paul Reinhold Schroeder
Publisher:
ISBN:
Category : Cattle
Languages : en
Pages : 168
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Author: Jared Vern Judy
Publisher:
ISBN:
Category : Feeds
Languages : en
Pages : 94
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The objectives of this research were to 1) evaluate the effects of stocking rate on forage nutrient quality 2) quantify the relative proportions of current vs. previous year growth being consumed in early summer upland range pastures and 3) determine how grazing effects forage nutrient quality in subirrigated meadows in the Nebraska Sandhills. Experiment 1 was a two year study conducted on the experimental upland range paddocks at Gudmundsen Sandhills Laboratory. Twelve 2-hectare paddocks were assigned one of three treatments stocked at 0 (control), 0.57 (light), and 0.85 (heavy) AUM/ha. Ten 0.25 m2 quadrats were clipped per paddock during the study. Diet quality was determined using esophageally fistulated cows. Experiment 2 was conducted at a commercial ranch near Lakeside, NE. Esophageally fistulated cows sampled pastures either grazed or non-grazed throughout the grazing season starting on June 14 and ending late August in a two year study. Samples were analyzed for IVOMD, CP and NDF content. Stocked upland range paddock diet samples had decreased CP, IVOMD, and greater NDF content compared with control paddocks for diet samples. Diet samples were lower in quality compared with current year growth but greater in quality compared with previous year growth indicating cattle consumed previous year growth as part of the diet. Forage accumulation increased linearly in control paddocks but did not change in stocked paddocks. Grazed samples had lower CP content than non-grazed pastures early in the grazing season and unaffected later in the season. Neutral detergent fiber was greater in grazed compared with non-grazed pastures early in the grazing season. Diet IVOMD was most affected by grazing as season progressed. These studies indicate grazing and stocking rate effect diet quality in subirrigated meadows and upland range. Producers need to rotate cattle frequently in early summer to ensure high quality intake..
Author: Mitchell B. Stephenson
Publisher:
ISBN:
Category : Pastures
Languages : en
Pages :
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Author: Alejandro Orozco-Lopez
Publisher:
ISBN:
Category : Cattle
Languages : en
Pages : 0
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The Nebraska Sandhills is diverse and complex ecosystem comprised of different topographic positions (i.e. slopes and interdunes) that influence grazing distribution, plant species composition, and cattle diet selection. The first objective of this study was to evaluate how grazing intensity influences species composition on slopes and interdunes on native rangeland within the Hillside pasture (160 ha) at the UNL Gudmundsen Sandhill's Laboratory. The second objective of this study was to evaluate forage quality of individual species from three plant functional groups (i.e. warm-season grasses, coolseason grasses, and forbs/shrubs) on native rangeland within the pasture. Forage quality samples were taken from 4 warm-season grasses, 5 cool-season grasses, 1 forb, and 2 shrubs. Samples were collected every 7-15 days from mid-May to early August in 2020 and 2021. The third objective of the study was to evaluate diet composition of cattle grazing (n = 40) within the pasture during the growing season using fecal DNA barcoding (fDNA). Fecal samples were collected from 7-8 cows every 10-20 days from early June to late-July in 2020 and 2021. Frequency of occurrence of western ragweed (Ambrosia psilostachya DC.) was 28 percentage points greater (P =0.03) and Kentucky bluegrass (Poa pratense L.) trended to be greater (P =0.07) on high grazing intensity interdunes than low intensity grazing interdunes. When averaged across the growing season, CP of forbs/shrubs was 3.3 and 2.9 percentage points greater than cool- and warm-season grasses (P 0.05). However, there were no differences (P 0.1) in CP between warmand cool-season grasses or functional group x collection date interactions. Diet selection as determined by fDNA indicated that cattle obtained most of their dietary protein from cool-season grasses (43.6% ± 1.5) and forbs (29.1% ± 1.5), while shrubs (13.0% ± 1.5) and warm-season grasses (3.5% ± 1.5) contributed significantly less (P
Author: Miles D. Redden
Publisher:
ISBN:
Category : Grasslands
Languages : en
Pages : 125
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Book Description
Mob grazing using ultrahigh stocking densities is promoted as a tool to increase the health and productivity of grasslands by increasing nutrient cycling and soil organic matter. Mob grazing can be defined as a strategy in which area available to grazing animals is restricted to achieve stocking densities of 200,000 kg/ha or greater. Objectives were to determine herbage production, utilization, and cattle weight gains among ultrahigh stocking density grazing and more conventional grazing methods on a Sandhills subirrigated meadow. Treatments included two replications of each of the following: four-pasture rotational grazing with two occupations per pasture in an 80-day grazing season (4-PR-2), four-pasture rotational grazing with one occupation per pasture in a 60-day grazing season (4-PR-1), and a mob grazing system with one occupation per pasture in a 60-day grazing season (MOB). In each of the four years (2010 -- 2013), yearling beef cattle grazed the 4-PR-2 from mid-May through early August and the 4-PR-1 and MOB treatments from early June through early August. Stocking rates were equal among treatments within years but varied among years dependent on forage production. Stock densities were 225,000 kg/ha, 7000 kg/ha, and 5000 kg/ha for the MOB, 4-PR-1, and 4-PR-2 respectively. Herbage mass in grazing exclosures was used to estimate aboveground production in 2012 and 2013. Trampling and harvest efficiency were estimated every other week in the MOB and each time cattle changed pastures in the 4-PR-1 and 4-PR-2 during 2010, 2011, and 2013. Aboveground production did not differ among treatments. Average daily gains of MOB were low (0.2 kg/head/day) compared to 4-PR-2 gains (0.8 kg/head/day). Low gains on the MOB pastures likely were related to high levels of trampling and poor forage quality late in the grazing season.
Author: W. H. Shafer
Publisher: Springer Science & Business Media
ISBN: 1468442295
Category : Science
Languages : en
Pages : 311
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Book Description
Masters Theses in the Pure and Applied Sciences was first conceived, published, and dis seminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS) * at Purdue University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dissemination phases of the ac tivity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all concerned if the printing and distribution of the volume were handled by an international publishing. house to assure improved service and broader dissemination. Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Corporation of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 25 (thesis year 1980) a total of 10,308 theses titles from 27 Canadian and 214 United States universities. We are sure that this broader base for theses titles reported will greatly enhance the value of this important annual reference work. While Volume 25 reports theses submitted in 1980, on occasion, certain universities do report theses submitted in previous years but not reported at the time.
Author: John F. Vallentine
Publisher: Elsevier
ISBN: 0080532594
Category : Technology & Engineering
Languages : en
Pages : 673
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Grazing animals need to be managed in order to accommodate desired results in terms of animal, plant, land and economic responses. Grazing Management, Second Edition integrates principles and management techniques that apply to all grazing lands and to all grazing animals. This comprehensive volume provides authoritative review on a wide range of relevant topics: animal nutrition and nutritional balance when fed on different sorts of grazing lands; seasonal variation and limits placed on ecosystems by grazing; the effects of grazing on grazing lands; the various sorts of grazing behaviors; selecting plants and managing grazing lands, as well as many other important topics bearing upon the methods, practises and procedures for properly managing grazing lands and animals. - Animal nutrition and nutritional balance when fed on different sorts of grazing lands - Seasonal variation and limits placed on ecosystems by grazing - The effects of grazing on grazing lands - The various sorts of grazing behaviours - Selecting plants and managing grazing lands
Author:
Publisher:
ISBN:
Category : Ranching
Languages : en
Pages : 738
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Author: Dale Downs
Publisher:
ISBN:
Category : Beef cattle
Languages : en
Pages : 194
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Author: Torie Lindsey
Publisher:
ISBN:
Category : Plants
Languages : en
Pages : 70
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A study was conducted on a subirrigated meadow in the Nebraska Sandhills to determine differences in aboveground plant production, utilization, trampling, harvest efficiency, ground cover, plant functional group composition and animal performance among four grazing treatments. Grazing treatments included ultrahigh stocking density, four-pasture rotation with one occupation (4-PR-1), and four-pasture rotation with two occupations (4-PR-2). Pastures were grazed from May to August in 2014 and 2015 at equal stocking rates within years but varied among years. Stocking densities were 225,000 kg ha-1 for ultrahigh stocking density, 7,000 kg ha-1 for 4-PR-1, and 5,000 kg ha-1 for 4-PR-2. Aboveground plant production did not differ among treatments. Litter mass was 2 to 4 times greater in control treatments but there were no differences among grazed treatments. Standing dead biomass did not differ among treatments. Utilization was greater in ultrahigh stocking density treatments than 4-PR-1, likely due to trampling amounts, which were greatest in ultrahigh stocking density. Remaining herbage was lowest in ultrahigh stocking density treatments. Cool-season grass composition was greatest in the 4-PR-1 treatment and lowest in the control treatment. Warm-season grass composition was greatest in 2015 for grazed treatments and in 2014 for the control treatment. Sedges and rushes did not differ among grazed treatments. Percentage forbs did not differ among treatments and peaked in 2014. There were no treatment effects on ground cover; including litter, bare ground and plant base hits. In 2014, steer daily gains among all treatments were not different. In 2015, steer average daily gains in the 4-PR-2 were greater than ultrahigh stocking density and 4-PR-1 daily gain.
