Effect of zilpaterol feeding duration and feedlot period on performance, carcass c...
| Full text | |
| 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]
Total Authors: 7
|
| 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
Total Affiliations: 3
|
| 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 type: | Regular Research Grants |