Season-Long vs Intensive-Early Stocking with Growing Cattle Grazing Bermudagrass Pasture |
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| Affiliation: | 4. Dept. of Crop, Soil, and Environmental Science.;1. Department of Natural Resources Ecology and Management, Oklahoma State University, Stillwater, OK, 74078, USA;2. The Nature Conservancy, Pawhuska, OK, 74056, USA;1. Department of Biological Engineering, University of Nebraska-Lincoln, 223 L. W. Chase Hall, Lincoln, NE 68583-0726, United States;2. School of Natural Resources, University of Nebraska-Lincoln, 101 Hardin Hall, Lincoln, NE 68583-0961, United States;3. Department of Agronomy and Horticulture, University of Nebraska, Lincoln, NE 68503-0984, United States;4. Department of Civil and Environmental Engineering, University of Nebraska-Lincoln, 1110 S. 67th St., Omaha, NE 68182-0178, United States;1. Department of Natural Resources and Environmental Sciences, University of Illinois as Urbana-Champaign, Urbana, IL 61801 USA;2. Graduate Program in Ecology, Evolution, and Conservation Biology, University of Illinois as Urbana-Champaign, Urbana, IL 61801 USA;3. Department of Ecology, Evolution and Organismal Biology, Iowa State University, Ames, IA 50011 USA;4. Department of Natural Resource Ecology and Management, Oklahoma State University, Stillwater, OK 74078 USA;1. USDA Natural Resources Conservation Service, West National Technology Support Center, 1201 NE Lloyd Blvd, Suite 801, Portland, OR, 97232;2. Oregon Department of Agriculture, Enterprise, OR, 97828;3. The Nature Conservancy, Bend, OR, 97702;4. Department of Agronomy and Horticulture, University of Nebraska–Lincoln, Lincoln, NE, 68588 |
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| Abstract: | Our objective was to compare the performance of weaned steer calves managed with intensive-early stocking (IES; 12.4 steers per ha for 70 d) or season-long stocking (SLS; 6.2 steers per ha for 140 d) with and without supplementation (2 x 2 factorial). Beginning on May 15, 90 steers (BW = 217 ± 0.8 kg) were randomly assigned to one of 12 common bermudagrass (Cynodon dactylon [L.] Pers.) pastures (0.81 ha each) fertilized with 168 kg of nitrogen/ ha. One of the following four treatments was randomly applied to three pastures: i) SLS plus no supplement, ii) SLS plus 0.45 kg/steer of ground corn daily, iii) IES plus no supplement, and iv) IES plus 0.45 kg/steer of ground corn daily. Steers on IES were lighter (P=0.01) than SLS steers on d 70. By d 140, SLS steers supplemented with corn were 33 kg heavier (P=0.02) than nonsupplemented steers. When using SLS, corn increased the BW gain 0.5 kg/kg of corn fed; however, when IES was used, there was no benefit from corn supplementation. Total BW gain/ha did not differ (P>0.17) among treatments, but SLS with corn supplementation could have the potential to produce more BW gain/ ha compared to the other treatments. Grazing systems did not affect feedlot ADG (P>0.53), but IES (175 d on feed) steers did have a higher (P<0.01) feedlot total BW gain than the SLS steers (154 d on feed). Using IES positively affected (P<0.08) dressing percentage and longissimus area compared to SLS; however, these differences in carcass characteristics were probably the result of the longer feeding period. |
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