Paya Hamid, Giannenas Ilias, Taghizadeh Akbar, Hosseinkhani Ali, Palangi Valiollah, Hasanpur Karim, Ayasan Tugay, Montazerharzand Mehri, Shirmohammadi Shahram, Elmi Naser
Department of Animal Science, Agricultural Faculty, University of Tabriz, Tabriz, Iran.
Laboratory of Nutrition, Faculty of Veterinary Medicine, Aristotle University of Thessaloniki, Thessaloniki, Greece.
J Dairy Res. 2022 Aug 30:1-6. doi: 10.1017/S0022029922000553.
This experiment aimed to investigate the effects of inulin supplementation on milk production and composition, feed intake, nutrient digestibility and rumen fermentation parameters in lactating ewes. The experimental treatments were (1) control group (basal diet), (2) basal diet plus 2% inulin (w/w) and (3) basal diet plus 4% inulin (w/w). The experiment was carried out for 21 d in a fully randomized design involving eighteen Ghezel ewes. Production and composition (percentages of fat, protein, lactose and fat-free solids and fatty acid profiles) of milk were measured. Faeces were collected in the last 3 days of the experiment to determine digestibility. On the last day of the experiment, rumen fluid samples were taken from the esophagus 3 h after feeding and fermentation parameters (pH, ammonia nitrogen (N-NH), volatile fatty acids (VFA) and protozoal population) were examined. Daily milk production was not significantly affected by inulin supplementation, but the fat and protein content of the milk was increased whilst urea nitrogen (MUN) and unsaturated fatty acids were decreased ( < 0.05). The dry matter (DM) intake results showed that there was no significant difference between different diets. The highest digestibility of DM and NDF belonged to the inulin fed group ( < 0.05). Inulin consumption numerically increased the pH of the rumen fluid of the animals and significantly decreased the rumen N-NH value ( < 0.05). Inulin supplementation also significantly increased total VFA, acetate, and butyrate levels ( < 0.05). In general, it can be concluded that inulin supplementation can improve rumen fermentation, DM and NDF digestibility,as well as compositional aspects of the ewe's milk production.
本实验旨在研究补充菊粉对泌乳母羊产奶量、奶成分、采食量、养分消化率和瘤胃发酵参数的影响。实验处理包括：（1）对照组（基础日粮）；（2）基础日粮 + 2%菊粉（w/w）；（3）基础日粮 + 4%菊粉（w/w）。本实验采用完全随机设计，选用18只盖泽尔母羊，为期21天。测定了奶的产量和成分（脂肪、蛋白质、乳糖、非脂固形物的百分比以及脂肪酸谱）。在实验的最后3天收集粪便以测定消化率。在实验的最后一天，于采食后3小时从食管采集瘤胃液样本，并检测发酵参数（pH值、氨氮（N-NH）、挥发性脂肪酸（VFA）和原虫数量）。补充菊粉对日产奶量无显著影响，但奶中的脂肪和蛋白质含量增加，而尿素氮（MUN）和不饱和脂肪酸含量降低（P<0.05）。干物质（DM）采食量结果表明，不同日粮之间无显著差异。DM和NDF的消化率最高的是菊粉饲喂组（P<0.05）。摄入菊粉使动物瘤胃液的pH值呈数值性增加，并显著降低瘤胃N-NH值（P<0.05）。补充菊粉还显著提高了总VFA、乙酸和丁酸水平（P<0.05）。总体而言，可以得出结论，补充菊粉可改善瘤胃发酵、DM和NDF消化率以及母羊产奶的成分方面。
