脂肪形式和来源对生长猪脂肪和脂肪酸消化率的影响

畜牧编辑

　　2017. J. Anim. Sci. 95(7):3103-3109
　　脂肪形式和来源对生长猪脂肪和脂肪酸消化率的影响

　　Z. C. Li, Y. B. Su, X.H. Bi, Q. Y. Wang ,J. Wang , J. B. Zhao, L. Liu, F. L. Wang, D. F. Li and C.H. Lai

　　本试验的主要目的在于比较不同来源脂肪（玉米DDGS、米糠、大豆）和脂肪形式（提纯或原料中的油脂）对酸水解乙醚提取物（acid-hydrolyzed ether extract， AEE）和脂肪酸表观消化率和真消化率的影响。

　　本试验检测和比较了精炼和粗制玉米油、米糠油和大豆油的酸水解乙醚提取物和脂肪酸表观消化率和真消化率的差异。试验选用78头去势公猪（初始重47.2±3.9kg，品种为杜长大），随机分为13个日粮处理，每个处理6头。13种日粮包括1个玉米淀粉-豆粕型基础日粮（AEE为0.56%）、3个含6%精制油脂（玉米油、米糠油和大豆油）、3个玉米DDGS（17%、34%、51%）、3个全脂米糠（14%、28%、42%）、3个全脂大豆（添加量12%、24%、36%）。不同添加量的玉米DDGS、全脂米糠、全脂大豆分别提供2、4、6%的油脂。去势公猪饲养在个体代谢笼中，每天饲喂体重4%的饲料。在7天适应期后，收集5天的粪便。计算每种日粮AEE的表观消化率。使用回归法计算内源AEE含量和AEE真消化率。提纯油脂AEE的表观消化率显著高于原料中油脂消化率（P＜0.05）。与提纯油相比，原料中油脂的棕榈酸（C16:0）、硬脂酸（C18:0）、油酸（C18:1）、亚油酸（C18:2）、和亚麻酸（C18:3）的真消化率更低（P＜0.01）。但是油脂形式和来源对硬脂酸、亚油酸、亚麻酸的真消化率有互作（P＜0.01）。

　　玉米油和米糠油硬脂酸、亚油酸、亚麻酸的真消化率显著高于玉米DDGS和全脂米糠油脂的消化率（P＜0.05），而大豆油和全脂大豆之间确没有显著差异。总之，油脂从原料中提取之后消化率有显著提高，特别对于饱和脂肪酸来说。全脂米糠和米糠油中AEE的表观消化率低于玉米和大豆油脂。玉米DDGS和全脂大豆的AEE真消化率高于全脂米糠。

　　Effects of lipid form and source on digestibility of fat and fatty acids in growing pigs

　　Z. C. Li, Y. B. Su, X.H. Bi, Q. Y. Wang ,J. Wang , J. B. Zhao, L. Liu, F. L. Wang, D. F. Li and C.H. Lai

　　The objective of this study was to compare the effect of source (corn DDGS, rice bran, or soybean) or form of oil (extracted or intact) on apparent total tract digestibility (ATTD) and true total tract digestibility (TTTD) of acid-hydrolyzed ether extract (AEE) and fatty acids. The study determined and compared the ATTD or TTTD of AEE and fatty acids in extracted corn oil, rice oil, and soybean oil with intact oil in corn DDGS, full-fat rice bran, and full-fat soybean. Seventy-eight barrows (initial BW = 47.2 ± 3.9 kg; Duroc × Landrace × Yorkshire) were allotted to 1of 13 dietary treatments in a randomized complete block design with 6 barrows in each dietary treatment. The 13 experimental diets included 1 corn starch-soybean meal basal diet (AEE, 0.56%) and 3 diets containing 6% extracted oils (corn oil, rice oil, and soybean oil) and 9 diets supplemented with 3 levels of corn DDGS (17%, 34%, and 51%), full-fat rice bran (14%, 28%, and 42%), and full-fat soybean (12%, 24%, and 36%). These diets provided about 2%, 4%, and 6% intact oil, respectively. The barrows were housed in individual metabolism crates and were fed the assigned test diets at 4% of initial BW per day. A 5-d total collection of feces followed a 7-d diet adaptation period. The ATTD of AEE were calculated for each diet. The endogenous flow of AEE associated with each ingredient and values for TTTD were calculated using regression methods. The ATTD of AEE were greater (P < 0.05) for extracted oil than for intact oil. Compared to extracted oil, intact oil had lower (P< 0.01) ATTD of palmitic acid (C16:0), stearic acid (C18:0), oleic acid(C18:1), linoleic acid (C18:2), and linolenic acid (C18:3). However, a source by form interaction (P < 0.01) was observed for ATTD of C18:0, C18:2, and C18:3. The ATTD of C18:0, C18:2, and C18:3 in extracted corn and rice oil were greater compared with intact corn DDGS and rice oil (P < 0.05), while there was no significant difference for the ATTD of C18:0, C18:2, and C18:3 between extracted soybean oil and intact oil in full-fat soybean. In conclusion, lipids that are extracted have a greater digestibility compared with intact lipids, and this is especially true regarding saturated fatty acids. The ATTD of AEE in 2 forms of rice oil (intact oil and extracted oil) was less than the values in corn oil and soybean oil. The TTTD of AEE in corn DDGS and full-fat soybeans were greater than in full-fat rice bran.
      翻译：朱滔   来源：猪营养国际论坛CSIS

叶知秋

很好，如果补充上具体数据就更赞 啦

畜牧编辑

叶知秋 发表于 2017-8-29 09:47
很好，如果补充上具体数据就更赞 啦

dazhui

脂肪酸的分布也应该有影响