Effects of Dietary Selenium Yeast and Dihydroxyacetone on Growth Performance,Slaughter Performance,Meat Quality and Serum Biochemical and Antioxidant Indices of Goats
This experiment was conducted to study the effects of dietary selenium yeast and dihydroxyacetone on growth performance,slaughter performance,meat quality and serum biochemical and antioxidant indices of goats.Ninety-six 6-month-old healthy male Chuanzhong black goats with an average body weight of(24.83±1.50)kg were selected and randomly divided into 4 groups with 4 replicates per group and 6 goats per repli-cate.Goats in the control group(CON group)were fed a basal diet,and others in experimental groups were fed the basal diets supplemented with 0.3 mg/kg selenium yeast(SY group),25 mg/kg dihydroxyacetone(DHA group)and 0.3 mg/kg selenium yeast+5 mg/kg dihydroxyacetone(SY-DHA group),respectively.The pre-experimental period lasted for 10 days,and the experimental period lasted for 60 days.The results showed as follows:1)compared with CON group,the average daily gain(ADG)and average daily feed in-take(ADFI)of SY and SY-DHA groups were significantly increased(P＜0.05),and the feed to gain ratio(F/G)was significantly decreased(P＜0.05).2)Compared with CON group,the dry matter,crude protein and neutral detergent fiber apparent digestibilities of SY and SY-DHA groups were significantly increased(P＜0.05).3)There were no significant differences in slaughtering performance and organ indices among all groups(P＞0.05).4)Compared with CON group,the redness value and pH 45 min in longissimus dorsi and biceps femoris of SY and SY-DHA groups were significantly increased(P＜0.05),and the redness value in bi-ceps femoris of SY-DHA group was significantly higher than that of SY group(P＜0.05).Compared with CON group,the drip loss in longissimus dorsi and pH 24 h in biceps femoris of SY,DHA and SY-DHA groups were significantly decreased(P＜0.05).5)Compared with CON group,the serum total protein(TP)content of SY,DHA and SY-DHA groups was significantly increased(P＜0.05),and the serum alkaline phos-phatase(ALP)activity was significantly decreased(P＜0.05);the contents of globulin(GLB)and high-den-sity lipoprotein(HDL)in serum of DHA and SY-DHA groups were significantly increased(P＜0.05),and the contents of albumin(ALB)and total cholesterol(TC)in serum of SY-DHA groups were significantly in-creased(P＜0.05).6)Compared with CON group,the serum total antioxidant capacity(T-AOC)of SY,DHA and SY-DHA groups was significantly increased(P＜0.05),and the serum malondialdehyde(MDA)content was significantly decreased(P＜0.05);the activities of glutathione peroxidase(GSH-Px)and superox-ide dismutase(SOD)in serum of DHA and SY-DHA groups were significantly increased(P＜0.05).In sum-mary,dietary selenium yeast can improve the growth performance and nutrient apparent digestibilities of goats;dietary selenium yeast or dihydroxyacetone can improve the meat quality of goats,increase the serum TP con-tent,improve the lipid metabolism and enhance the antioxidant capacity,and the combined addition of seleni-um yeast and dihydroxyacetone has a better effect.[Chinese Journal of Animal Nutrition,2024,36(6):3797-3810]
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维普
