Effect of supplementation of bioactive rich tree leaves on nutrient utilization, growth performance, methane emission and fatty acid profile in finisher lambs fed energy dense diet
R.S. Bhatt , Srobana Sarkar , Lalit Soni , Priya Sharma , A. Sahoo , A. Soni
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引用次数: 0
Abstract
To study the effect of supplementing bioactive rich tree foliages in energy dense diet on lamb production and tissue fatty acid profile, 24 weaner male lambs (∼90days old) were divided equally into 2 groups and fed complete feed blocks without (C) and with 6% Hardwickia binata (anjan tree) leaves (T). Feed blocks in both the groups consisted of 3.25% rumen bypass fat. Dry matter intake and plane of nutrition were comparable among the groups but digestibility of neutral and acid detergent fibre were lower (P<0.05) in T than C. Rumen fermentation attributes revealed higher (P<0.05) concentration and proportion of propionic acid and total volatile fatty acids in T compared to C. The metagenomic equivalent values of total methanogens and protozoa were lower (P<0.05) while, population of Butyrivibrio fibrisolvens was higher in T compared to C. Loss of metabolizable energy through methane was reduced by 4.6 percentage points in T than C which resulted in higher microbial nitrogen synthesis in T from methane mitigation. Subsequently, the average daily gain in lambs was improved by 5.9% in T compared to C. The fatty acid profile of Longissimus thoracis muscle revealed higher (P<0.05) C18:2c9t11 content in lambs of T group than C. Hence, from the present findings it can be concluded that inclusion of Hardwickia binata leaves at 6% level increased condensed and hydrolysable tannin content of the diet which modestly affected rumen fermentation resulting in reduced methane production and enhanced conjugated linoleic acid content in muscle tissue.
为了研究在高能量日粮中添加富含生物活性的树叶对羔羊产量和组织脂肪酸谱的影响,将 24 只断奶雄性羔羊(∼90 日龄)平均分成两组,分别饲喂不含(C)和添加 6% Hardwickia binata(安然树)树叶(T)的全价饲料块。两组的饲料都含有 3.25% 的瘤胃旁路脂肪。各组的干物质摄入量和营养平面相当,但 T 组的中性和酸性洗涤纤维消化率低于 C 组(P<0.05)。瘤胃发酵属性表明,T 组的丙酸和总挥发性脂肪酸的浓度和比例高于 C 组(P<0.05)。甲烷造成的可代谢能量损失在 T 中比 C 中减少了 4.6 个百分点,这导致 T 中甲烷缓解产生的微生物氮合成量增加。随后,T 组羔羊的平均日增重比 C 组提高了 5.9%。T 组羔羊胸长肌脂肪酸谱显示 C18:2c9t11 含量比 C 组高(P<0.05)。因此,从本研究结果中可以得出结论:添加 6% 的 Hardwickia binata 叶片可增加日粮中的缩合单宁和可水解单宁含量,从而适度影响瘤胃发酵,减少甲烷的产生,提高肌肉组织中共轭亚油酸的含量。
期刊介绍:
Small Ruminant Research publishes original, basic and applied research articles, technical notes, and review articles on research relating to goats, sheep, deer, the New World camelids llama, alpaca, vicuna and guanaco, and the Old World camels.
Topics covered include nutrition, physiology, anatomy, genetics, microbiology, ethology, product technology, socio-economics, management, sustainability and environment, veterinary medicine and husbandry engineering.