Performance, carcass characteristics and meat quality of Nellore cattle supplemented with supranutritional doses of sodium selenite or selenium-enriched yeast

Author(s)

Silva, J. S. ^[1] ; Rodriguez, F. D. ^[2] ; Trettel, M. ^[1] ; Abal, R. T. ^[1] ; Lima, C. G. ^[1] ; Yoshikawa, C. Y. C. ^[3] ; Zanetti, M. A. ^[1]

Affiliation

^[1] Univ Sao Paulo, Coll Anim Sci & Food Engn, Dept Anim Sci, BR-13635900 Pirassununga - Brazil

^[2] Univ Corp Huila Corhuila, Coll Vet Med & Allied Sci, Neiva - Colombia

^[3] Univ Fed Sao Paulo, Dept Biosci, BR-11015020 Santos, SP - Brazil

• Document type: Journal article
• Source: ANIMAL; v. 14, n. 1, p. 215-222, JAN 2020.
• Web of Science Citations: 1

Abstract

The enrichment of meat with selenium is important to improve the intake of selenium by humans. The effects of supranutritional doses of sodium selenite or selenium-enriched yeast on performance, carcass characteristics and meat quality were evaluated using 63 Nellore cattle in a completely randomized design with two sources (sodium selenite and selenium-enriched yeast), three levels (0.3, 0.9 and 2.7 mg Se/kg DM) and control treatment (without addition of selenium). Final body weight (BW), average daily gain, dry matter intake and gain to feed ratio (G : F) at the end of 84 days of supplementation were not influenced by treatments (P>0.05). Values of pH, ribeye area, back fat thickness and marbling score were also not influenced by treatments (P>0.05). Dressing percentage was greater (P=0.02) in Nellore cattle supplemented with organic Se (58.70%) compared to animals supplemented with inorganic Se (57.94%). Hot carcass weight increased (P=0.05) with the increasing of Se levels in the diet. Colour, shear force (SF), cooking and drip loss remained unchanged (P>0.05); however thiobarbituric acid reactive substances was 15.51% higher with inorganic Se compared with organic Se. The selenium concentration in the meat of animals receiving organic selenium was higher (P<0.001) than that of animals receiving sodium selenite, at all levels (0.3; 0.9 and 2.7 mg/kg DM). The meat of animals receiving 2.7 mg of organic Se/kg of DM presented concentration of 372.7 mu g Se/kg in the L.dorsi muscle, and the intake of 150 g of this meat by humans provides approximately 100% of the recommended Se intake (55 mu g Se/day for adults). Therefore, the use of supranutritional doses of 2.7 mg Se/kg of DM, regardless of source, is a way of naturally producing selenium-enriched meat without compromising performance, carcass characteristics and quality of Nellore bovine meat. (AU)

• FAPESP's process: 15/07175-6 - Influence of supplementation of two sources of selenium on meat quality from confined beef cattle
• Grantee: Marcus Antonio Zanetti
• Support Opportunities: Regular Research Grants