• Cattle Diets on Irrigated Pasture

      Yates, D. A.; Wallace, J. D. (Society for Range Management, 1978-05-01)
      Chemical composition and in vitro organic matter digestibility of grazed forages collected during June, July, and August were compared. Protein in grazed orchardgrass was usually higher than that from alta fescue and forages representing either orchardgrass or fescue were higher in protein than tall wheatgrass forage. During August, protein in grazed forages from all pastures was higher and fiber content lower than during June or July. Lignin content in grazed forage was highest for orchardgrass, intermediate for wheatgrass, and lowest for fescue. Digestibility favored orchardgrass over either fescue or wheatgrass. During the 7-day sampling periods of each month, the quality of diets selected by cattle decreased as sampling period progressed. Suggestions are offered as to when irrigated pasture might be more beneficially used in an integrated system with native range.
    • Effect of Continuous Grazing on the Diet of Steers

      Yates, D. A.; Clanton, D. C.; Nichols, J. T. (Society for Range Management, 1982-05-01)
      Continuous grazing of Sandhill native forage at a normal stocking rate in late August had no effect on organic matter intake (OMI), but the protein content and in vitro organic matter digestibility (IVOMD) declined over a 3-week period. The average OMI was 75 g/kg W^.75. As the availability of forage declined, the ability of the steers to selectively graze was apparently reduced. Similarly, continuous grazing of mixed prairie-type range from October 30 to March 13 had no effect on OMI but the protein content of the diet was reduced. The IVOMD did not change during the winter grazing trial. The average OMI was 66 g/kg W^.75 Steer calves gained .24 kg daily during the grazing period.