活性干酵母对晋岚绒山羊生长性能、屠宰性能及血清生化指标的影响

doi:10.16431/j.cnki.1671-7236.2024.07.008

摘要/Abstract

摘要： 【目的】研究活性干酵母对晋岚绒山羊生长性能、屠宰性能及血清生化、免疫和抗氧化指标的影响,选出适宜的活性干酵母添加量。【方法】选取100只3月龄晋岚绒山羊公羔开展育肥试验,随机分为5组,每组20只,每个重复4只。试验组ADY1、ADY2、ADY3和ADY4每只羊在基础饲粮基础上分别补饲1、2、3、4 g/d活性干酵母,对照组(ADY0)羊不添加活性干酵母。预试验15 d,正试验90 d,每30 d进行生长性能及血清生化、免疫和抗氧化指标测定,第90天进行屠宰性能测定。【结果】与对照组相比,①ADY3和ADY4组羊终末体重显著升高(P＜0.05),料比重显著降低(P＜0.05);第90天时,ADY3组羊胸围和体长均显著增加(P＜0.05),ADY4组羊胸围显著增加(P＜0.05)。②ADY3和ADY4组羊宰前活重、胴体重和眼肌面积均显著增加(P＜0.05),胴体脂肪含量和背膘厚均显著降低(P＜0.05);ADY2、ADY3和ADY4组羊净肉重和净肉率均显著增加(P＜0.05),ADY3和ADY4组羊心脏重均显著升高(P＜0.05)。③第30、60、90天,4个试验组羊血清中甘油三酯(TG)含量均显著升高(P＜0.05);ADY3组第30天羊总胆固醇(TC)含量显著降低(P＜0.05);第90天时,ADY2和ADY3组羊总蛋白(TP)和球蛋白(GLB)含量均显著增加(P＜0.05)。④第60、90天时,ADY3组羊免疫球蛋白A(IgA)和肿瘤坏死因子-α(TNF-α)含量均显著升高(P＜0.05)。⑤第60天时,ADY3组羊总抗氧化能力(T-AOC)和超氧化物歧化酶(SOD)活性均显著升高(P＜0.05);第60、90天时,ADY3组羊丙二醛(MDA)含量均显著降低(P＜0.05)。⑥第90天时,ADY2和ADY3组羊血清中胰岛素生长因子-1(IGF-1)含量显著增加(P＜0.05)。【结论】在饲料中添加适量活性干酵母可以提高晋岚绒山羊的生长性能和屠宰性能,增强免疫力及抗氧化能力,综合考虑,添加2~3 g/d较为适宜。

关键词: 晋岚绒山羊; 活性干酵母; 生长性能; 屠宰性能; 免疫性能; 抗氧化能力

Abstract: 【Objective】 This study was aimed to explore the effects of active dry yeast on growth performance,slaughtering performance and serum biochemical,immune and antioxidant indexes of Jinlan cashmere goats,and select the appropriate amount of active dry yeast.【Method】 A total of 100 3-month-old Jinlan cashmere male lambs were randomly divided into 5 groups,with 20 lambs in each group and 4 lambs in each replicate.Goats in experimental groups ADY1,ADY2,ADY3 and ADY4 were fed with 1,2,3 and 4 g/d active dry yeast on the basis of the basal diet,respectively,while goats in control group (ADY0) was not added active dry yeast.The growth performance and serum biochemical,immune and antioxidant indexes were measured every 30 days,and the slaughter performance was measured on days 90 after the initial experiment for 15 days and the formal experiment for 90 days.【Result】 Compared with control group,① The final body weight of goats in ADY3 and ADY4 groups was significantly increased (P＜0.05),and the feed to gain was significantly decreased (P＜0.05).On days 90,the chest circumference and body length of goats in ADY3 group were significantly increased (P＜0.05),and the chest circumference of goats in ADY4 group was significantly increased (P＜0.05).② The live weight before slaughter,carcass weight and eye muscle area of goats in ADY3 and ADY4 groups were significantly increased (P＜0.05),while the carcass fat content and backfat thickness were significantly decreased (P＜0.05).The net meat weight and net meat percentage of goats in ADY2,ADY3 and ADY4 groups were significantly increased (P＜0.05),and the heart weight of goats in ADY3 and ADY4 groups was significantly increased (P＜0.05).③ On days 30,60 and 90,the serum triglyceride (TG) content of goats in 4 experimental groups was significantly increased (P＜0.05),and the total cholesterol (TC) content of goats in ADY3 group was significantly decreased (P＜0.05).On days 90,the contents of total protein (TP) and globulin (GLB) of goats in ADY2 and ADY3 groups were significantly increased (P＜0.05).④ On days 60 and 90,the contents of immunoglobulin A (IgA) and tumor necrosis factor-α (TNF-α) in ADY3 group were significantly increased (P＜0.05).⑤ On days 60,the total antioxidant capacity (T-AOC) and superoxide dismutase (SOD) activity of goats in ADY3 group were significantly increased (P＜0.05).On days 60 and 90,the malondialdehyde (MDA) content of goats in ADY3 group was significantly decreased (P＜0.05).⑥ On days 90,the serum insulin growth factor-1 (IGF-1) content of goats in ADY2 and ADY3 groups was significantly increased (P＜0.05).【Conclusion】 Adding an appropriate amount of active dry yeast to the feed could improve the growth performance and slaughtering performance of Jinlan cashmere goats,enhance immunity and antioxidant capacity.Considering the comprehensive indicators,the appropriate adding amount was 2-3 g/d.

Key words: Jinlan cashmere goats; active dry yeast; growth performance; slaughter performance; immunity; antioxidant capacity

中图分类号:

S816.73

刘茵, 王志武, 赵鹏, 张丽, 郭宏宇, 王豪俊. 活性干酵母对晋岚绒山羊生长性能、屠宰性能及血清生化指标的影响[J]. 中国畜牧兽医, 2024, 51(7): 2810-2822.

LIU Yin, WANG Zhiwu, ZHAO Peng, ZHANG Li, GUO Hongyu, WANG Haojun. Effects of Active Dry Yeast on Growth Performance,Slaughter Performance and Serum Biochemical Indexes of Jinlan Cashmere Goats[J]. China Animal Husbandry and Veterinary Medicine, 2024, 51(7): 2810-2822.

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