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Tropical grass and legume pastures may alter lamb meat physical and chemical characteristics

Publicado en:Tropical Animal Health And Production. 53 (4): 427- - 2021-09-01 53(4), doi: 10.1007/s11250-021-02861-6

Joy M.;

Afiliaciones

Canadian Institute for Theoretical Astrophysics - Financiador
Centro de Investigaci?n y Tecnolog?a Agroalimentaria de Arag?n - Autor o Coautor
Centro de Investigación y Tecnología Agroalimentaria de Aragón - Entidad de origen
Embrapa Pecuaria Sul, Empresa Brasileira Pesquisa Agr, BR-96401970 Bage, RS, Brazil - Autor o Coautor
Empresa Brasileira de Pesquisa Agropecuaria - Embrapa - Autor o Coautor
Federal University of Rio Grande do Sul - Autor o Coautor
Inst Agroalimentario Aragon IA2 CITA, Ctr Invest & Tecnol Agroalimentaria Aragon, Avda Montanana 930, Zaragoza 50059, Spain - Autor o Coautor
Pontificia Univ Catolica Parana, Grad Program Anim Sci, 1155 Imaculada Conceicao, BR-80215901 Curitiba, Parana, Brazil - Autor o Coautor
Pontificia Universidade Catolica do Parana - Autor o Coautor
Univ Fed Rio Grande do Sul, Dept Anim Sci, 7712 Av Bento Goncalves, BR-91540000 Porto Alegre, RS, Brazil - Autor o Coautor
Univ Fed Rio Grande do Sul, Food Sci & Technol Inst, BR-91501970 Porto Alegre, RS, Brazil - Autor o Coautor
Univ Fed Santa Maria, Dept Anim Sci, BR-97105900 Santa Maria, RS, Brazil - Autor o Coautor
Universidade Federal de Santa Maria - Autor o Coautor
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Resúmen

Resúmen: The present study assessed the influence of the type of the tropical pastures on lamb body weight (BW) gain and meat quality. Fifty-four lambs were allocated to three grazing pastures: (1) AG — Aruana grass (Panicum maximum cv. IZ-5); (2) PP — pigeon pea legume (Cajanus cajan cv. Anão); and (3) CS — contiguous swards, half of the paddock with AG and half with PP. After 92 days of grazing, the lambs were slaughtered. Carcasses were evaluated and the longissimus muscle was collected to determine color, lipid profile, tocopherol concentrations, and lipid oxidation. Although the pastures present differences in the characteristics of nutritional quality, the animals did not show difference in BW gain. The results show that all forage presented similar concentration of alpha-tocopherol (137 ± 14.37 mg kg−1 of fresh matter), whereas total and condensed tannin contents were greater in PP, intermediate in CS, and the lowest in AG treatment (P = 0.0001). Meat α-tocopherol content was similar among treatments (P = 0.1392), with an average concentration close to the optimal level to reduce the meat oxidation. Meat from AG treatment had 45 and 25% lower n-6/n-3 ratio than meat from PP and CS treatments, respectively. The legume increases the unsaturated fatty acids and the grass can reduce the n6/n3 ratio. The level of condensed tannin concentration did show to have important effect on meat characteristics. Both tropical pastures studied can provide a high amount of alpha-tocopherol, generating a great potential to increase the concentration of this antioxidant in lamb’s meat.

Palabras clave: alpha-tocopherol; chromium-oxide; color stability; condensed tannins; fatty acids; grazing; green panic; lipid oxidation; pigeon pea; quality; ruminant meat; shelf-life; tannin; tocopherol; vitamin-e supplementation; Fatty acids; Fatty-acid-composition; Grazing; Green panic; Pigeon pea; Tannin; Tocopherol

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