Effects of Zn-L-Selenomethionine on Carcass Composition MeatCharacteristics Fatty Acid Composition Glutathione Peroxidase Activity andRibonucleotide Content in Broiler Chickens

摘要

The effects of organic Zn-L-selenomethionine (Zn-L-SeMet) at 0.3 ppm on carcasscomposition, meat characteristics, fatty acid composition, glutathioneperoxidase activity, and ribonucleotide content were compared against thecommercial inorganic sodium selenite (Na-Se) and the combination of the two, incommercial broilers. A total of 540 one day-old chicks were assigned at randomto 3 dietary treatments : i) commercial inorganic selenium as control or T1, ii)a 1:1 ratio of inorganic and organic selenium as T2, and iii) organic seleniumas T3. Carcass composition, meat characteristics, cholesterol content, fattyacid composition, and ribonucleotide content were generally unaffected bytreatments. However, discrepancy were significantly observed in glutathioneperoxidase activity (GSH-Px) and water holding capacity, with organic seleniumshowing higher glutathione peroxidase activity (p<0.01) and lowershrinkage loss (p<0.05), respectively. These findings could be explainedby the contribution of organic selenium in bioavailability of GSH-Px. However,having conducted in a commercial close house system with sufficient amount ofnutritional supplementation, the present study demonstrated little or no effectsof organic Zn-L-SeMet on meat characteristics, fatty acid composition, andribonucleotide content (flavor characteristic) in broiler chickens.