混合植物精油对绵羊生长性能、养分消化、瘤胃发酵及血液指标的影响

Effects of mixed plant essential oils on growth performance,nutrient digestion,rumen fermentation and blood indices of sheep

文章旨在研究全混合日粮添加不同水平的混合植物精油对绵羊生长性能、养分消化、瘤胃发酵及血液指标的影响。试验将72头体重为(26.58±1.25)kg的绵羊随机分为3组,每组6个重复,每个重复4头。对照组饲喂基础全混合日粮,T1和T2组饲喂全混合日粮+100和200 mg/kg混合植物精油,试验为期4周。结果:与对照组相比,200 mg/kg混合植物精油组绵羊有机物及中性洗涤纤维摄入量分别显著提高1.77%和8.53%(P<0.05)。与对照组相比,100和200 mg/kg混合植物精油组瘤胃pH分别显著提高4.96%和5.60%(P<0.05),但甲烷产量分别显著降低14.98%和16.86%(P<0.05)。对照组瘤胃氨氮浓度较200 mg/kg混合植物精油组显著提高38.14%(P<0.05)。与对照组相比,100和200 mg/kg混合植物精油组血清葡萄糖浓度分别显著提高25.49%和21.20%(P<0.05),而200 mg/kg混合植物精油组血清β-羟基丁酸浓度较其他组分别显著提高27.78%和43.75%(P<0.05)。结论:在全混合日粮中添加200 mg/kg混合物植物精油可以提高绵羊有机物和中性洗涤纤维摄入量,降低瘤胃甲烷产量,对血清大部分生化指标无负面影响。

This experiment was conducted to investigate the effects of different levels of mixed plant essential oils in total mixed diet on growth performance,nutrient digestion,rumen fermentation and blood indices of sheep.A total of 72 sheep with body weight of(26.58±1.25)kg were randomly divided into 3 groups with 6 replicates per group and 4 goats per replicate.The control group was fed a basal total mixed diet,and the others in T1 and T2 groups were fed a total mixed diet+100 and 200 mg/kg mixed essential oil.The experiment lasted for 4 weeks.Results:Compared with the control group,organic matter and neutral detergent fiber intake in 200 mg/kg mixed plant essential oil group were significantly increased by 1.77%and 8.53%(P<0.05),respectively.Compared with control group,rumen pH value in 100 and 200 mg/kg mixed plant essential oil groups was significantly increased by 4.96%and 5.60%(P<0.05),respectively,but methane production was significantly decreased by 14.98%and 16.86%(P<0.05),respectively.Rumen ammonia nitrogen concentration in control group was significantly increased by 38.14%compared with that in 200 mg/kg mixed plant essential oil group(P<0.05).Compared with the control group,serum glucose concentration in 100 and 200 mg/kg mixed plant essential oil groups was significantly increased by 25.49%and 21.20%(P<0.05),respectively,while serumβ-hydroxybutyric acid concentration in 200 mg/kg mixed plant essential oil group was significantly increased by 27.78%and 43.75%(P<0.05)compared with other groups,respectively.In summary:Adding 200 mg/kg mixed plant essential oil in the total mixed diet can improve the intake of organic matter and neutral detergent fiber,reduce methane production,and have no negative effects on most serum biochemical indexes of sheep.