动物营养学报 >

2018 , Vol. 30 >Issue 12: 5145 - 5152

DOI: https://doi.org/10.3969/j.issn.1006-267x.2018.12.043

饲料营养 Feed science and technology

不同淀粉来源饲粮中添加酵母培养物对育肥湖羊生长性能、养分消化率及瘤胃发酵参数的影响

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  • 1. 兰州大学草地农业生态系统国家重点实验室, 兰州大学农业农村部草牧业创新重点实验室, 兰州大学草地农业科技学院, 兰州 730020;
    2. 四川农业大学动物营养研究所, 成都 611130;
    3. 甘肃省肉羊繁育生物技术工程实验室, 民勤 733300
闫佰鹏(1993-),男,甘肃永昌人,硕士研究生,从事反刍动物营养研究。E-mail:yanbp16@lzu.edu.cn

收稿日期: 2018-05-23

  网络出版日期: 2018-12-19

基金资助

公益性行业（农业）科研专项经费（201503134，2015-2019）；兰州大学中央高校基本科研业务费专项资金（lzujbky，2017-48）；长江学者和创新团队发展计划（IRT_17R50）

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Effects of Yeast Culture Supplementation in Diets with Different Starch Sources on Growing Performance, Nutrient Digestibility and Ruminal Fermentation Parameters in Hu Sheep

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  • 1. State Key Laboratory of Grassland Agro-Ecosystems;Key Laboratory of Grassland Livestock Industry Innovation, Ministry of Agriculture and Rural Affairs;College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou 730020, China;
    2. Animal Nutrition Institute, Sichuan Agricultural University, Chengdu 611130, China;
    3. Engineering Laboratory of Mutton Sheep Breeding and Reproduction Biotechnology in Gansu Province, Minqin 733300, China

Received date: 2018-05-23

  Online published: 2018-12-19

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摘要

本试验旨在研究不同淀粉来源（SS）饲粮中添加酵母培养物（YC）对育肥湖羊生长性能、屠宰性能、养分消化及瘤胃发酵参数的影响。采用2×2因子试验设计，选取体重约为（21.69±2.49） kg的2月龄湖羊公羔120只，随机分为4组，分别为添加1% YC的大麦淀粉（BS-1）组、大麦淀粉（BS）组、添加1% YC的玉米淀粉（CS-1）组、玉米淀粉（CS）组，每组5个重复，每个重复6只羊。预试期7 d，正试期56 d。结果表明：1）各组末重、平均日增重、干物质采食量和料重比均差异不显著（P>0.05）。2）各组宰前活重、胴体重、屠宰率、背膘厚度、GR值、尾脂重及肾周脂重均无显著差异（P>0.05），但BS-1组、CS-1组眼肌面积显著高于BS组、CS组（P<0.05）。3）各组干物质、有机物表观消化率无显著差异（P>0.05），但BS-1组、CS-1组中性洗涤纤维（NDF）、酸性洗涤纤维（ADF）表观消化率显著高于BS组、CS组（P<0.05）；4）各组总挥发性脂肪酸含量及丙酸、丁酸、戊酸、异丁酸、异戊酸占总挥发性脂肪酸比例无显著差异（P>0.05），而BS组乙酸占总挥发性脂肪酸比例显著高于CS组（P<0.05）。综上，不同SS来源饲粮中添加YC未改变瘤胃发酵类型，但显著提高饲粮NDF与ADF表观消化率，进而提高育肥湖羊对粗饲料的利用率。

关键词： 酵母培养物; 淀粉来源; 湖羊; 生长性能; 屠宰性能; 瘤胃发酵; 养分消化

本文引用格式

闫佰鹏, 兰贵生, 李国彰, 牛骁麟, 李发弟, 李飞, 翁秀秀 . 不同淀粉来源饲粮中添加酵母培养物对育肥湖羊生长性能、养分消化率及瘤胃发酵参数的影响[J]. 动物营养学报, 2018 , 30(12) : 5145 -5152 . DOI: 10.3969/j.issn.1006-267x.2018.12.043

Abstract

The objective of this experiment was to study the effects of yeast culture (YC) supplementation in diets with different starch sources on growth performance, slaughter performance, nutrient digestion and ruminal fermentation parameters of Hu sheep. The experiment adopted a 2×2 factorial arrangement. A total of 120 two-month-old healthy Hu sheep [(21.69±2.49) kg] were assigned to four groups: the barley starch supplemented with 1% YC (BS-1) group, the barley starch(BS) group, the corn starch supplemented with 1% YC (CS-1) group and the corn starch (CS) group, with five replicates in each group and 6 sheep in each replicates. The preliminary test period was 7 d and the formal trial period was 56 d. The results showed as follows: 1) there were no significant differences in final weight, average daily gain, dry matter intake and the ratio of feed to gain among groups (P>0.05). 2) There were no significant differences in live weight before slaughter, carcass weight, dressing percentage, back-fat thickness, GR value, tail fat weight and perirenal fat weight among groups (P>0.05), but the eye muscle area of groups BS-1 and CS-1 were significantly higher than those in groups BS and CS (P<0.05). 3) The apparent digestibility of dry matter and organic matter in groups were no significant difference (P>0.05), but the apparent digestibility of neutral detergent fiber (NDF) and acid detergent fiber (ADF) in groups BS-1 and CS-1 were significantly higher than those in groups BS and CS (P<0.05). 4) There were no significant differences in total volatile fatty acid (TVFA) content, the ratios of acetic acid, propionic acid, butyric acid, valeric acid, isobutyric acid, isovaleric acid to TVFA and the ratio of acetic to propionic among groups (P>0.05), but the ratio of acetate to TVFA in group BS was significantly higher than that in group CS (P<0.05). In summary, YC supplementation in diets with different starch sources does not change ruminal fermentation pattern, but significantly increase the apparent digestibility of NDF and ADF, thereby increasing the utilization of roughage.

Key words： yeast culture; starch source; Hu sheep; growth performance; slaughter performance; ruminal fermentation; nutrient digestion

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