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Journal of Animal Science, Vol 71, Issue 11 3124-3130, Copyright © 1993 by American Society of Animal Science

JOURNAL ARTICLE

Effects of supplementation on intake, growth rate, and fleece production by female Angora kid goats grazing rangeland

J. E. Huston, C. A. Taylor, C. J. Lupton and T. D. Brooks
Texas Agricultural Experiment Station, Texas A&M University System, San Angelo 76901.

Ninety-eight and 88 female Angora kid goats (6 mo of age) were grazed/browsed on Edwards Plateau rangeland in 92- and 88-d trials in 1989 and 1990, respectively. The goats were either not supplemented (negative control, NC) or fed isoenergetic amounts of corn (C), a corn/cottonseed meal/molasses mixture (C/CSM), or a corn/cottonseed meal/fish meal/molasses mixture (C/CSM/FM). The C/CSM and C/CSM/FM supplements provided equal CP but different amounts of ruminally undegraded protein (UDP). The goats were allowed to graze/browse in a common pasture and were separated into treatment groups three times each week for feeding. Intakes of supplement and forage were measured using a dual-marker technique. Forage intake was not increased with supplemental feeding (P = .21), but tended (P = .08) to be greater with high-protein supplements than with C. Total digestible DMI was greater (P < .01) for supplemented goats and was not affected by supplement type. Supplemental feeding increased BW gain (P < .01) and clean fleece weight (CFW; P < .01). High-protein supplements increased BW gain (P < .01), CFW (P = .07), fiber diameter (FD; P < .01), and staple length (P < .01) compared with C. Greater amounts of UDP (C/CSM/FM) did not increase BW gain (P = .99) but tended to increase CFW (P = .12) and FD (P = .15). Supplemental feeding increased total digestible DMI by partial substitution (corn) for forage or addition (high-protein supplements) to forage, and both energy and protein increased BW gain and CFW and influenced mohair traits.


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Copyright © 1993 by the American Society of Animal Science.