研究论文 RESEARCH PAPER

发酵茶渣对肉羊生长性能、瘤胃发酵参数和营养物质表观消化率的影响

  • 冉雷 ,
  • 黄小云 ,
  • 范彩云 ,
  • 胡海涛 ,
  • 卓钊 ,
  • 丁建平 ,
  • 张子军 ,
  • 宛晓春 ,
  • 黄进宝 ,
  • 程建波
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  • 1. 安徽农业大学动物科技学院, 合肥 230036;
    2. 安徽农业大学茶树生物学与资源利用国家重点实验室, 合肥 230036
冉雷(1989-),男,安徽阜阳人,硕士研究生,动物营养与饲料科学专业。E-mail:1771005917@qq.com

收稿日期: 2021-08-04

  网络出版日期: 2022-03-14

基金资助

安徽省重点研发计划项目(202004a06020006);安徽农业大学茶树生物学与资源利用国家重点实验室开放基金资助项目(SKLTOF20160203)

Effects of Fermented Tea Residue on Growth Performance, Rumen Fermentation Parameters and Nutrient Apparent Digestibility of Mutton Sheep

  • RAN Lei ,
  • HUANG Xiaoyun ,
  • FAN Caiyun ,
  • HU Haitao ,
  • ZHUO Zhao ,
  • DING Jianping ,
  • ZHANG Zijun ,
  • WAN Xiaochun ,
  • HUANG Jinbao ,
  • CHENG Jianbo
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  • 1. College of Animal Science and Technology, Anhui Agricultural University, Hefei 230036, China;
    2. State Key Laboratory of Tea Tree Biology and Resource Utilization, Anhui Agricultural University, Hefei 230036, China

Received date: 2021-08-04

  Online published: 2022-03-14

摘要

本试验旨在研究发酵茶渣对肉羊生长性能、瘤胃发酵参数和营养物质表观消化率的影响,以确定发酵茶渣替代肉羊精料补充料的适宜比例。试验选取64只3月龄、体重(20.0±2.5)kg的健康湖羊,随机分为4组,每组16只。对照组饲喂基础饲粮,Ⅰ组、Ⅱ组、Ⅲ组在基础饲粮的基础上分别用发酵茶渣等比例替代5%、10%、20%的精料补充料。结果表明:1)各组之间肉羊的末重、平均日增重、干物质采食量和料重比均无显著差异(P>0.05)。2)Ⅱ组的瘤胃液丙酸(PA)比例显著高于对照组和Ⅲ组(P<0.05),Ⅰ组和Ⅱ组的瘤胃液乙酸/丙酸(AA/PA)显著低于对照组和Ⅲ组(P<0.05)。各组之间肉羊的瘤胃液pH和总挥发性脂肪酸(TVFA)、氨态氮(NH3-N)、微生物蛋白(MCP)含量以及乙酸(AA)、丁酸(BA)比例均无显著差异(P>0.05)。3)对照组和Ⅰ组的粗脂肪表观消化率显著高于Ⅲ组(P<0.05)。各组之间肉羊的有机物、粗蛋白质、干物质、中性洗涤纤维和酸性洗涤纤维表观消化率均无显著差异(P>0.05)。4)与对照组相比,Ⅰ组、Ⅱ组、Ⅲ组的饲料成本和饲料增重成本均有所降低,其中,Ⅲ组的降低幅度最大。由此可见,本试验条件下,发酵茶渣替代5%、10%、20%的精料补充料对肉羊的生长性能以及大部分瘤胃发酵参数、营养物质表观消化率均无显著影响,从经济效益考虑,建议发酵茶渣替代肉羊精料补充料的适宜比例为20%。

本文引用格式

冉雷 , 黄小云 , 范彩云 , 胡海涛 , 卓钊 , 丁建平 , 张子军 , 宛晓春 , 黄进宝 , 程建波 . 发酵茶渣对肉羊生长性能、瘤胃发酵参数和营养物质表观消化率的影响[J]. 动物营养学报, 2022 , 34(3) : 1768 -1776 . DOI: 10.3969/j.issn.1006-267x.2022.03.037

Abstract

This experiment was conducted to study the effects of fermented tea residue on growth performance, rumen fermentation parameters and nutrient apparent digestibility of mutton sheep, and to determine the appropriate proportion of fermented tea residue to replace the concentrate supplement for mutton sheep. Sixty-four 3-month-old healthy Hu sheep with a body weight of (20.0±2.5) kg were randomly divided into 4 groups with 16 sheep in each group. The control group was fed a basal diet, and the group Ⅰ, group Ⅱ and group Ⅲ were fed the basal diet with 5%, 10% and 20% fermented tea residue to replace the concentrate supplement, respectively. The results showed as follows:1) there were no significant differences in final body weight, average daily gain, dry matter intake and feed to gain ratio of mutton sheep among all groups (P>0.05). 2) The rumen fluid propionic acid (PA) proportion of group Ⅱ was significantly higher than that of control group and group Ⅲ (P<0.05), and the rumen fluid acetic acid/propionic acid (AA/PA) of group Ⅰ and group Ⅱ was significantly lower than that of control group and group Ⅲ (P<0.05). There were no significant differences in pH, contents of total volatile fatty acids (TVFA), ammonia nitrogen (NH3-N) and microbial protein (MCP) and proportions of acetic acid (AA) and butyric acid (BA) in rumen fluid of mutton sheep among all groups (P>0.05). 3) The ether extract apparent digestibility of control group and group Ⅰ was significantly higher than that of group Ⅲ (P<0.05). There was no significant difference in apparent digestibility of organic matter, crude protein, dry matter, neutral detergent fiber and acid detergent fiber of mutton sheep among all groups (P>0.05). 4) Compared with the control group, the feed cost and cost feed weight of group Ⅰ, group Ⅱ and group Ⅲ were decreased, among them, the group Ⅲ decreased the most. In conclusion, under this experiment conditions, the fermented tea residue to replace 5%, 10% and 20% concentrate supplement has no significant effects on the growth performance and most rumen fermentation parameters and nutrient apparent digestibility of mutton sheep, considering the economic benefits, it is suggested that the optimal proportion of fermented tea residue to replace concentrate supplement of mutton sheep is 20%.

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