Evaluating the effects of finishing diet and feeding location on sheep performance, carcass characteristics, and internal parasites.

Autor:	Ragen DL; Department of Animal and Range Sciences, Montana State University, Bozeman, MT 59717, USA., Butler MR; Department of Animal and Range Sciences, Montana State University, Bozeman, MT 59717, USA., Boles JA; Department of Animal and Range Sciences, Montana State University, Bozeman, MT 59717, USA., Layton WA; Montana Department of Livestock, Bozeman, MT 59718, USA., Craig TM; Department of Veterinary Pathobiology, Texas A&M University, College Station, TX 77843, USA., Hatfield PG; Department of Animal and Range Sciences, Montana State University, Bozeman, MT 59717, USA.
Jazyk:	angličtina
Zdroj:	Journal of animal science and technology [J Anim Sci Technol] 2021 May; Vol. 63 (3), pp. 545-562. Date of Electronic Publication: 2021 May 31.
DOI:	10.5187/jast.2021.e42
Abstrakt:	A 3 yr experiment was conducted to evaluate the influence of diet and feeding location on animal performance, carcass characteristics, whole blood counts, and internal parasite burden of lambs assigned to 1 of 4 treatments: 1) confinement fed 71% alfalfa, 18% barley pellet, 5% molasses, 0.013% Bovatec, 6.1% vitamin/mineral package diet (CALF), 2) confinement fed 60% barley, 26% alfalfa pellet, 4% molasses, 2.5% soybean-hi pro, 0.016% Bovatec, 7.4% vitamin/mineral package diet (CBAR), 3) field fed 71% alfalfa, 18% barley pellet, 5% molasses, 0.013% Bovatec, 6.1% vitamin/mineral package diet (FALF), and 4) field fed 60% barley, 26% alfalfa pellet, 4% molasses, 2.5% soybean-hi pro, 0.016% Bovatec, 7.4% vitamin/mineral package diet (FBAR). A year × location interaction was detected for ending body weight (BW), average daily gain (ADG), and dry matter intake (DMI); therefore results are presented by year. In all years, cost of gain and DMI were greater for CALF and FALF than for CBAR and FBAR feed treatments ( p ≤ 0.03). In yr 2 and 3 field treatments had greater ending BW and ADG than confinement treatments. For all years, diet did not affect ending BW or ADG. In yr 1 dressing percent and rib eye area were greater for field finished lambs than confinement finished ( p ≤ 0.02) and Warner-Bratzler shear force was greater for CALF and FALF ( p = 0.03). In yr 2 lambs in FALF and FBAR treatments had greater leg scores and conformation than CALF and CBAR ( p = 0.09). In yr 1, FALF had a greater small intestine total worm count than all other treatments. In yr 1, ending Trichostrongyle type egg counts were greater for FALF ( p = 0.05). In yr 2, ending Nematodirus spp. egg counts were greater for FALF and lowest for CBAR ( p < 0.01). Abomasum Teladorsagia circumcinta worm burden was greater in CALF than all other treatments ( p = 0.07) in yr 2. While field finishing lambs with a grain- or forage-based diet we conclude that it is possible to produce a quality lamb product without adverse effects to animal performance, carcass quality or increasing parasite burdens. Competing Interests: No potential conflict of interest relevant to this article was reported. (© Copyright 2021 Korean Society of Animal Sciences and Technology.)
Databáze:	MEDLINE
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