Preprint Article Version 1 This version is not peer-reviewed

Nutritional Supplements Fortified with Oils from Canola, Flaxseed, Safflower and Rice Bran Enhance Feedlot Performance and Carcass Characteristics of Australian Prime Lambs

Version 1 : Received: 3 November 2018 / Approved: 5 November 2018 / Online: 5 November 2018 (10:16:48 CET)

A peer-reviewed article of this Preprint also exists.

Le, H.V.; Nguyen, Q.V.; Nguyen, D.V.; Malau-Aduli, B.S.; Nichols, P.D.; Malau-Aduli, A.E.O. Nutritional Supplements Fortified with Oils from Canola, Flaxseed, Safflower and Rice Bran Improve Feedlot Performance and Carcass Characteristics of Australian Prime Lambs. Animals 2018, 8, 231. Le, H.V.; Nguyen, Q.V.; Nguyen, D.V.; Malau-Aduli, B.S.; Nichols, P.D.; Malau-Aduli, A.E.O. Nutritional Supplements Fortified with Oils from Canola, Flaxseed, Safflower and Rice Bran Improve Feedlot Performance and Carcass Characteristics of Australian Prime Lambs. Animals 2018, 8, 231.

Journal reference: Animals 2018, 8, 231
DOI: 10.3390/ani8120231

Abstract

This study investigated live animal performance and carcass characteristics of Australian prime lambs fed oil based polyunsaturated fatty acid (PUFA) enriched pellets in a feedlot system. The tested hypothesis was that supplementation of lambs with a variety of dietary oil based PUFA enriched pellets would enhance growth and carcass characteristics compared with the control lambs on lucerne only. Seventy-two, 6 months old White Suffolk x Corriedale first-cross prime lambs with an average liveweight (LWT) of 35.7 ± 0.9 kg were allocated to six treatment groups in a completely randomised experimental design. The treatments were: (1) control: lucerne hay only; or lucerne hay plus wheat-based pellets infused with 50 ml/kg DM of oils from (2) rice bran (RBO); (3) canola (CO); (4) rumen protected (RPO); (5) flaxseed (FO) and (6) safflower (SO) dietary sources. All lambs had ad libitum access to lucerne hay and clean fresh water. Supplemented lambs were fed 1kg of pellet/head/day for 10 weeks. Feed intake, final LWT, average daily gain (ADG), body conformation and carcass characteristics of lambs in the supplemented groups were all greater than for the control group. SO lambs had the lowest ADG of 190.3 g/day. RBO and CO treatments had the lowest feed cost per unit gain of AU$ 3.0/kg. Supplemented lambs had similar over the hooks (OTH) incomes that were all higher than that of the control group. This empirical evidence-based data demonstrated that supplementation of lambs with RBO and CO had comparatively lower feed costs without compromising ADG, carcass characteristics and OTH income.

Subject Areas

PUFA; oil; prime lamb; feedlot; carcass characteristics; live performance; oils; canola; flaxseed; safflower; rice bran

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