动物营养学报 >

2019 , Vol. 31 >Issue 12: 5562 - 5570

DOI: https://doi.org/10.3969/j.issn.1006-267x.2019.12.022

反刍与草食动物营养 Ruminant and herbivore nutrition

饲粮中添加酵母硒对杜寒杂交羊生长性能、氮代谢、屠宰性能及肉品质的影响

  • 张永翠 ,
  • 程光民 ,
  • 何孟莲 ,
  • 王恩玲 ,
  • 左兆云 ,
  • 王元新 ,
  • 徐相亭
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  • 1. 山东畜牧兽医职业学院, 潍坊 261061;
    2. 兰陵县畜牧发展促进中心, 临沂 277700
张永翠(1982-),女,山东济南人,讲师,硕士,从事动物营养与饲料研究。E-mail:1-zyc@163.com

收稿日期: 2019-06-12

  网络出版日期: 2019-12-13

基金资助

山东省现代农业产业技术体系羊产业创新团队（SDAIT-10-05）；潍坊市科技发展计划项目（2018GX055）

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Effects of Dietary Selenium Yeast on Growth Performance, Nitrogen Metabolism, Slaughter Performance and Meat Quality of Dorper×Thin-Tailed Han Crossbred Sheep

  • ZHANG Yongcui ,
  • CHENG Guangmin ,
  • HE Menglian ,
  • WANG Enling ,
  • ZUO Zhaoyun ,
  • WANG Yuanxin ,
  • XU Xiangting
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  • 1. Shandong Vocational Animal Science and Veterinary College, Weifang 261061, China;
    2. Animal husbandry development promotion center in Lanling County, Linyi 277700, China

Received date: 2019-06-12

  Online published: 2019-12-13

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摘要

本试验旨在研究饲粮中添加酵母硒对杜寒杂交羊生长性能、氮代谢、屠宰性能和肉品质的影响。选用体重（34 kg左右）相近、健康状况良好的杜寒杂交断奶羔羊40只，随机分为4组，每组10只，进行单栏单只饲养，每组饲粮中分别添加0（对照）、0.2、0.4、0.8 mg/kg硒（添加形式为酵母硒）。预试期10 d，正试期70 d。结果表明：1）当硒添加量为0.2 mg/kg时，平均日增重（ADG）最高，显著高于0.4、0.8 mg/kg组（P<0.05），料重比（F/G）最低。2）饲粮中添加硒对食入氮（IN）、粪氮（FN）、可消化氮（DN）、沉积氮（RN）、氮表观消化率均无显著影响（P>0.05）；当硒添加量为0.2 mg/kg时，尿氮（UN）含量最低，氮利用率及氮生物学利用率最高，与0.4、0.8 mg/kg组差异显著（P<0.05）。3）当硒添加量为0.2 mg/kg时，屠宰率、净肉率均最高，显著高于对照组和0.8 mg/kg组（P<0.05）；硒添加量对骨肉比、眼肌面积、GR值无显著影响（P>0.05），但随硒添加量的增加，呈现先升高后降低的趋势。4）当硒添加量为0.4、0.8 mg/kg时，屠宰后pH显著高于对照组和0.2 mg/kg组（P<0.05），而硒添加量对pH24 h无显著影响（P>0.05）；当硒添加量为0.4、0.8 mg/kg时，肉红度值显著高于对照组和0.2 mg/kg组（P<0.05）；当硒添加量为0.2 mg/kg时，剪切力最大，同时熟肉率最高，显著高于对照组（P<0.05）。由此可见，饲粮中硒添加量为0.2 mg/kg时，能显著提高杜寒杂交羊的屠宰率，降低肉的pH、剪切力，并且提高熟肉率。但硒添加量为0.8 mg/kg时，会导致杜寒杂交羊中毒。

关键词： 酵母硒; 杜寒杂交羊; 生长性能; 氮代谢; 屠宰性能; 肉品质

本文引用格式

张永翠 , 程光民 , 何孟莲 , 王恩玲 , 左兆云 , 王元新 , 徐相亭 . 饲粮中添加酵母硒对杜寒杂交羊生长性能、氮代谢、屠宰性能及肉品质的影响[J]. 动物营养学报, 2019 , 31(12) : 5562 -5570 . DOI: 10.3969/j.issn.1006-267x.2019.12.022

Abstract

The experiment was conducted to study the effects of dietary selenium yeast on the production performance, nitrogen metabolism, slaughter performance and meat quality of Dorper×thin-tailed Han crossbred sheep. Forty Dorper×thin-tailed Han crossbred sheep (the average body weight was about 34 kg) were randomly assigned to 4 groups, with 10 sheep in each group. Sheep in the 4 groups were fed experimental diets which supplemented with 0 (control), 0.2, 0.4, 0.8 mg/kg selenium (the form was selenium yeast). The experiment lasted for 10 days for adaption, and 70 days for test. The results showed as follows:1) average daily gain was the highest and the feed/gain was the lowest when the selenium supplemental level was 0.2 mg/kg, and average daily gain was significantly higher than that in 0.4 and 0.8 mg/kg group (P<0.05). 2) It had no significant effects on intake nitrogen, fecal nitrogen, digestible nitrogen, nitrogen deposition and apparent nitrogen digestibility (P>0.05); urinary nitrogen was the lowest and the nitrogen utilization and nitrogen bioavailability were the highest when the selenium supplemental level was 0.2 mg/kg, and it had significant difference compared with 0.4 and 0.8 mg/kg groups (P<0.05). 3) When the selenium supplemental level was 0.2 mg/kg, the dressing percentage and net meat rate were all the highest, and they were significantly higher than those in control group and 0.8 mg/kg group (P<0.05). Selenium supplemental level had no significant influence on bone to meat ratio, eye muscle area and GR value (P>0.05), but with the increasing of selenium supplemental level, those indictors increased firstly and then decrease. 4) When the selenium supplemental level was 0.4 and 0.8 mg/kg, the slaughtered pH was significantly higher than that in the control group and 0.2 mg/kg group (P<0.05), but it had no significant influence on pH24 h (P>0.05). The meat color in 0.4 and 0.8 mg/kg groups was significantly higher than that in 0.2 mg/kg and control groups (P<0.05). Meat shear force and cooked meat rate were significantly higher than those in other groups when the selenium supplemental level was 0.2 mg/kg (P<0.05). It is concluded that, when the selenium supplemental level is 0.2 mg/kg, it can significantly improve the dressing percentage, reduce the pH of meat and shear force, and it can improve the cooked meat rate of the sheep. But it can cause selenium poisoning of Dorper×thin-tailed Han crossbred sheep when the selenium addition level is 0.8 mg/kg.

Key words： selenium yeast; Dorper×thin-tailed Han crossbred sheep; growth performance; nitrogen metabolism; slaughtering performance; meat quality

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