000			00595nab|a22002177a|4500
999			_c64126 _d64118
001			64126
003			MX-TxCIM
005			20210902154432.0
008			200910s2021||||xxk|||p|op||||00||0|eng|d
022			_a1746-6148
024	8		_ahttps://doi.org/10.1186/s12917-021-02855-4
040			_aMX-TxCIM
041			_aeng
100	1		_aArnaut, P.R. _922434
245	1	0	_aSelenium source and level on performance, selenium retention and biochemical responses of young broiler chicks
260			_aLondon (United Kingdom) : _bBioMed Central, _c2021.
500			_aPeer review
500			_aOpen Access
520			_aBackground: Selenium (Se) has been recognized as an essential micronutrient for nearly all forms of life. In recent decades, broiler responses to dietary Se supplemental levels and sources have received considerable attention. On environmental grounds, organic trace mineral utilization in practical broiler feeds has been defended due to its higher bioavailability. In such feeds, trace minerals are provided simultaneously in the same supplement as inorganic salts or organic chelates, a fact commonly ignored in assays conducted to validate organic trace mineral sources. The current assay aimed to investigate growth and biochemical responses, as well as Se retention of growing chicks fed diets supplemented with organic and inorganic Se levels and where the trace minerals (zinc, copper, manganese, and iron) were provided as organic chelates or inorganic salts according to Se source assessed. In so doing, a 2 × 5 factorial arrangement was used to investigate the effects of sodium selenite (SS) and selenium-yeast (SY) supplemented in feeds to provide the levels of 0, 0.08, 0.16, 0.24, and 0.32 mg Se/kg. Results: Chicks fed selenium-yeast diets had body weight (BW), and average daily gain (ADG) maximized at 0.133 and 0.130 mg Se/kg, respectively. Both Se sources linearly increased (P < 0.05) the glutathione peroxidase (GSH-Px) activity in chick blood but higher values were observed in sodium selenite fed chicks (P < 0.05). Both Se sources influenced thyroid hormone serum concentrations (P < 0.05). Chicks fed SY exhibited greater retention of Se in the feathers (P < 0.05). Relative bioavailability of selenium yeast compared with SS for the Se content in carcass, feathers, total and Se retention were, 126, 116, 125 and 125%, respectively. SY supplementation resulted in lower liver Se concentration as Se supplementation increased (P < 0.05). Conclusions: Based on performance traits, the supplemental level of organic Se as SY in organic trace minerals supplement to support the maximal growth of broiler chicks is 0.133 mg Se/kg.
546			_aText in English
650		7	_2AGROVOC _922435 _aGlutathione peroxidase
650		7	_2AGROVOC _95624 _aTrace elements
650		7	_2AGROVOC _910359 _aSelenium
650		7	_2AGROVOC _912097 _aMineralization
700	1		_922436 _ada Silva Viana, G.
700	1		_922437 _ada Fonseca, L.
700	1		_922438 _aAlves, W.J.
700	1		_922439 _aMuniz, J.C.L.
700	1		_922440 _aPettigrew, J.E.
700	1		_919238 _aSilva, F.F.
700	1		_922441 _aRostagno, H.S.
700	1		_922442 _aHannas, M.I.
773	0		_tBMC Veterinary Research _gv. 17, art. 151 _dLondon (United Kingdom) : BioMed Central, 2021. _x1746-6148
856	4		_yClick here to access online _uhttps://doi.org/10.1186/s12917-021-02855-4
942			_cJA _n0 _2ddc