三丁酸甘油酯在肉鸡饲料中的应用效果研究

发布时间：2018-03-02 04:29

  本文关键词： 三丁酸甘油酯 肉鸡 生长性能 屠宰性能 丁酸 脂质代谢　出处：《武汉轻工大学》2015年硕士论文　论文类型：学位论文

【摘要】：为考察三丁酸甘油酯对肉鸡生长性能、屠宰性能和脂质代谢的影响,以及三丁酸甘油酯在肉鸡消化道内的消化状态。试验选用了1日龄cobb肉鸡300只,按照公母各半,体重相近及随机的原则,分为5个处理组,分别为对照组、三丁酸甘油酯Ⅰ组、三丁酸甘油酯Ⅱ组、三丁酸甘油酯Ⅲ组、三丁酸甘油酯Ⅳ组,每个处理组6个重复(栏),每栏10只鸡。分两个阶段饲养:第一阶段(1-21天),对照组饲喂基础日粮,四个三丁酸甘油酯组均饲喂在基础日粮中添加0.5%的三丁酸甘油酯的日粮;第二阶段(22-42天),三丁酸甘油酯Ⅰ组、三丁酸甘油酯Ⅱ组、三丁酸甘油酯Ⅲ组、三丁酸甘油酯Ⅳ组分别饲喂在基础日粮中添加0.5%、1%、2%、3%的三丁酸甘油酯的日粮。各处理组日粮营养水平基本一致。饲养期42天。饲养试验结束后,屠宰取样,分析屠宰性能指标和脂质代谢指标,同时从每个处理组选出体况相近的公鸡15只,进行代谢试验,分析三丁酸甘油酯在肉鸡消化道内的状态。1.三丁酸甘油酯对肉鸡生长性能的影响。(1)与对照组相比,在肉鸡日粮中添加0.5%三丁酸甘油酯,可以显著提高1-21天的平均日采食量和平均日增重(P0.05)。(2)与对照组相比,在肉鸡日粮中添加不同水平的三丁酸甘油酯对22-42天的肉鸡的生长性能没有显著影响(P0.05)。2.三丁酸甘油酯对肉鸡屠宰性能和脂质代谢的影响。(1)与对照组相比,在肉鸡日粮中添加0.5%、1%和2%三丁酸甘油酯,显著降低了公鸡的腹脂率(P0.05),1%和2%三丁酸甘油酯组对公鸡的半净膛率、全净膛率、胸肌率、腿肌率均有显著提高(P0.05),3%三丁酸甘油酯组提高了公鸡的胸肌率(P0.05);其中2%三丁酸甘油酯组比0.5%和3%三丁酸甘油酯组显著提高了半净膛率3.5%和4.3%(P0.05);添加1%和2%三丁酸甘油酯组比添加0.5%三丁酸甘油酯组提高了5.3%和5.1%(P0.05),比添加3%三丁酸甘油酯组提高了8.1%和7.8%(P0.05);添加1%、2%和3%三丁酸甘油酯组比0.5%三丁酸甘油酯组分别提高了胸肌率13.1%、21%和10.5%(P0.05);添加2%三丁酸甘油酯组比添加3%三丁酸甘油酯组显著降低腹脂率25.1%(P0.05);添加2%和3%的三丁酸甘油酯组比添加0.5%三丁酸甘油酯组公鸡血清中HLD-C水平分别提高了20%和2.7%(P0.05);添加2%和3%的三丁酸甘油酯组比添加1%三丁酸甘油酯组公鸡血清中HLD-C水平分别提高了17.2%和19.9%(P0.05)。而添加三丁酸甘油酯对母鸡屠宰性能的影响不显著(P0.05)。(2)与对照组比较,1%和2%三丁酸甘油酯组公鸡和母鸡的血清高密度脂胆固醇水平有显著提高(P0.05);2%三丁酸甘油酯组提高了公鸡血清甘油三酯的水平(P0.05)。3.三丁酸甘油酯在肉鸡消化道内的消化状态的测定。(1)在肝门静脉血中未检测出丁酸和三丁酸甘油酯;(2)在小肠中未检测出丁酸;(3)胃食糜中丁酸含量在前8小时随着三丁酸甘油酯的添加量提高而增加,并且3%三丁酸甘油酯组胃食糜中丁酸的含量高于0.5%、1%和2%三丁酸甘油酯组(P0.05)。检测到0.5%、1%、2%、3%三丁酸甘油酯组胃食糜中10小时的丁酸总和换算成三丁酸甘油酯,则分别占食入三丁酸甘油酯的0.96%、1.2%、0.83%、0.72%;(4)在盲肠中,前4小时内2%的三丁酸甘油酯组与0.5%和1%的三丁酸甘油酯组有显著差异(P0.05),之后6小时与0.5%、1%、3%的三丁酸甘油酯组有显著差异(P0.05)。检测到三丁酸甘油酯Ⅰ、Ⅱ、Ⅲ、Ⅳ组盲肠食糜中10小时的丁酸总和换算成三丁酸甘油酯占食入三丁酸甘油酯的9.26%、8.95%、8.92%、5.95%。总的来说,在饲料中添加0.5%三丁酸甘油酯可以提高1-21天肉鸡的生长性能。在饲料中添加1%和2%三丁酸甘油酯可以提高肉公鸡的屠宰性能,及改善血脂指标。约有1%的三丁酸甘油酯在胃部被分解,不超过食入三丁酸甘油酯的10%在盲肠中被分解,因此三丁酸甘油酯大部分被肠道分解利用。
[Abstract]:Study of three glyceryl butyrate on growth performance of broilers, affect the slaughter performance and lipid metabolism, and digestive state three tributyrin in in the digestive tract of broilers. The experiment selected 1 Cobb broilers at the age of 300, according to the male and female, and similar weight randomly divided into 5 groups, respectively. For the control group, three tributyrin group, three tributyrin group II, three tributyrin group III, IV three tributyrin group, each treatment consisted of 6 replications of each column (column), 10 chickens. Divided into two stages: the first stage feeding (1-21 days), the control group was fed the basic diet, diet four three tributyrin group were fed three tributyrin after adding 0.5% basic diets; second stage (22-42 days), three tributyrin group, three tributyrin group II, three tributyrin group, three tributyrin Group IV respectively. Were added to the diets of 0.5 %, 1%, 2%, three dietary tributyrin 3%. Dietary nutrient levels in each treatment group are basically the same. The feeding period of 42 days. At the end of the feeding trial, slaughtered, analysis of slaughter performance and lipid metabolism index, at the same time from each treatment group were similar to the body condition of 15 cocks in metabolic test, the effect of three glyceryl butyrate in the digestive tract of broilers in the state of.1. three glyceryl butyrate on growth performance of broilers. (1) compared with the control group, adding 0.5% three butyric acid glycerides in broiler diets can significantly increase the average daily intake of 1-21 days and average daily weight gain (P0.05). (2) compared with the control group, the growth performance of three glyceryl butyrate with different levels in broiler diets on broilers of 22-42 days did not significantly affect the effect of.2. (P0.05) three tributyrin on slaughter performance and lipid metabolism of broilers. (1) compared with the control group, in the diet of broilers in 娣诲姞0.5%,1%鍜，

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