Boron is a metalloid that plays an important role in the functioning of cell membrane, enzymatic reactions and the hormonal and mineral metabolism of animals. Boron is also thought to be an essential metalloid for animals. Boron compounds have a wide range of physiological effects in living...

Lambs were divided into 3 groups of 6 animals each. For 35 days lambs were fed a diet including 2% rapeseed oil, 1% fish oil and 0.1% carnosic acid (the control group) or two experimental diets supplemented with 0.35 mg ∙ kg⁻¹Se as selenized-yeast (SeY) (the SeY diet) or selenate (the selenate diet). Muscles (Musculus longissimus dorsi(MLD) andMusculus biceps femoris(MBF)), ruminal fluids and microbiota were collected from each lamb. SeY supplementation most effectively stimulated the accumulation of straight-chain volatile fatty acids (VFAs),iso-branched-chain VFAs, CO₂and CH₄in the ruminal fluid. The contents of CO₂, CH₄and VFAs including straight-chain VFAs with the exception ofiso-branched-chain VFAs were most effectively reduced by the selenite diet. The control diet most efficiently increased the concentration sums ofodd-saturated fatty acids (odd-SFAs) andiso-SFAs in microbiota. The SeY diet most efficiently reduced acetic acid to propionic acid ratio in the ruminal fluid. The selenate diet improved animal performance by reducing ruminal concentrations of CH₄and CO₂. The SeY diet and especially the selenate diet reduced the biohydrogenation to C18:0 when compared with the control diet. The selenate diet more efficiently reduced the concentration sums of all SFAs (ΣSFAs) and all fatty acids (ΣFAs) inMLDandMBFthan the SeY diet, which most effectively increased the concentrations of ΣSFAs and ΣFAs inMLDandMBF. The selenate diet most effectively increased the body mass gain of lambs.

A total of 160 Ross 308 female broilers from day 22 to 35 of age were used to investigate the effects of vitamin E and selenium (Se) supplementation on performance, fatty acid profile and oxidative stability of meat enriched with n-3 fatty acids. There were 4 treatment groups, 3 diets contained...