Journal of Range Management, Volume 37, Number 2 (March 1984): Recent submissions
Now showing items 21-22 of 22
Comparative Diets of Rambouillet, Barbado, and Karakul Sheep and Spanish and Angora GoatsDiets of Rambouillet, Karakul, and Barbado sheep (Ovis aries) and Spanish and Angora goats (Capra hircus) grazing in 3 plant communities in western Texas were determined by microhistological analysis of fecal samples. Grasses were commonly the major foods of all sheep breeds as well as Angora goats. Forbs were major diet items of all breeds of sheep and goats when they were readily available. Spanish goats, and to a lesser extent Angora goats, relied heavily on browse. Barbado sheep consumed more browse than did Rambouillet or Karakul sheep. Diets of Rambouillet and Karakul sheep overlapped considerably, whereas diets of Rambouillet sheep and Spanish goats were quite dissimilar. Barbado sheep appeared to occupy a food niche intermediate between that of the goats and the other sheep breeds. Spanish and Angora goats exhibited the strongest tendency and Karakul sheep exhibited the least tendency to selectively graze. Neither Barbado nor Karakul sheep consumed sufficient amounts of undesirable shrubs to be considered valuable for brush suppression.
Acceptable Block Beef from Steers Grazing Range and Crop ForagesSteers from 3 frame sizes were raised from birth to slaughter under different feed regimens including raised on the range to 18 months of age, raised on the range along with complementary forages to 18 months of age, and raised on the range to 18 months of age with subsequent concentrate feeding for 66 days. Quality grade, marbling, rib-eye area, fat thickness, and intramuscular fat were significantly higher for grain fed animals than for the grazing animals. There were no significant differences in overall palatability traits for grazing steers and grain fed steers. Small-frame steers gained less per day but had higher finish at comparable ages and period of treatment than large-frame steers. Acceptable primal cuts can be produced from grazing alone but the quality grade is higher for grain-fed animals. It was concluded that future beef production may use far more range and forage because of higher grain prices and an increasing demand for leaner meat by the consumer.