The influence of feeding fresh liquid whey on some blood metabolites, insulin, and cecal fermentations of growing pigs
The influence of feeding fresh liquid whey on some blood metabolites, insulin, and cecal fermentations of growing pigs
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DOI：
10.1016/j.anifeedsci.2006.02.007
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发表时间：
2006-11-15
影响因子：
3.2
通讯作者：
Biagi, G.
中科院分区：
文献类型：
--
作者：
Formigoni, A.;Piva, A.;Biagi, G.
进行了两个实验，以测量盲肠发酵和葡萄糖，非酯化脂肪酸（NEFA），尿素和胰岛素血浆浓度的生长猪饲喂新鲜液体乳清。实验1涉及一个24小时的体外盲肠发酵的生长猪的饮食，已预先预消化，以模拟回肠消化。使用预消化饮食的残余物，加入或不加入3 ml/g饮食的新鲜液体乳清。在实验2中，8头生长猪（平均活重126 kg）安装有腔静脉导管，并饲喂相同量的干物质，其中3.2 kg与实验I中使用的相同的饮食添加12.81的水（对照饮食）或2.25 kg添加12.81的新鲜液体乳清的饮食。在试验1中，添加乳清使最终总产气量增加了22%，最大产气量增加了12%，对数生长期延长了9%，滞后期缩短了（P < 0.05）。在发酵4小时时，含有乳清的容器中的氨高于对照（+14%; P < 0.001），但在8小时和24小时后没有观察到差异。在8 h时，乳清倾向于增加丙酸浓度（+11%; P=0.10），而在发酵4和8 h时，乳清降低乙酸与丙酸的比率（P < 0.05）。在实验2中，平均血浆葡萄糖餐后浓度在乳清喂养的动物中倾向于较低（-8%; P=0.08）。胰岛素分泌不受饮食治疗的影响。饲喂乳清降低了平均血浆尿素（-21%; P < 0.01），增加了平均血浆NEFA餐后浓度（+29%; P < 0.05）。总之，在猪日粮中添加新鲜液体乳清增强了盲肠发酵，并确定了猪的显著代谢变化，增加了血浆NEFA，降低了血浆葡萄糖和尿素。特别是，较低的尿素血浆浓度可能表明饲喂乳清减少了猪的肠道蛋白水解和内源性蛋白质催化剂。(c)2006 Elsevier B. V.保留所有权利。
Two experiments were conducted to measure cecal fermentation and glucose, non-esterified fatty acids (NEFA), urea, and insulin plasma concentrations of growing pigs fed fresh liquid whey. Experiment 1 involved a 24 h in vitro cecal fermentation of a growing pig diet that had been previously predigested to simulate ileal digestion. The residue of the predigested diet was used with or without the addition of fresh liquid whey at 3 ml/g of diet. In Experiment 2, eight growing pigs (average live weight 126 kg) were fitted with a vena cava catheter and fed the same amount of dry matter with 3.2 kg of the same diet used in Experiment I added with 12.81 of water (control diet) or 2.25 kg of the diet added with 12.81 of fresh liquid whey. In Experiment 1, the addition of whey increased the final total gas production by 22%, the maximum rate of gas production by 12%, and the duration of the logarithmic phase by 9%, and decreased the duration of the lag phase (P < 0.05). At 4 h of fermentation, ammonia was higher in vessels containing whey than in control (+ 14%; P < 0.001) but no differences were observed after 8 and 24 h. At 8 h, whey tended to increase propionic acid concentration (+11%; P=0.10) while the acetic to propionic acid ratio was reduced by whey at 4 and 8 h of fermentation (P < 0.05). In Experiment 2, average plasma glucose postprandial concentrations tended to be lower in whey fed animals (-8%; P=0.08). Insulin secretion was not influenced by dietary treatment. Feeding whey reduced average plasma urea (-21%; P < 0.01) and increased average plasma NEFA postprandial concentrations (+29%; P < 0.05). In conclusion, adding fresh liquid whey to pig diets enhanced cecal fermentation and determined significant metabolic changes in pigs, increasing plasma NEFA and reducing plasma glucose and urea. In particular, the lower urea plasma concentrations may indicate that feeding whey reduces intestinal proteolysis and endogenous protein catabolism in pigs. (c) 2006 Elsevier B.V. All rights reserved.