动物营养学报 >

2019 , Vol. 31 >Issue 5: 2416 - 2422

DOI: https://doi.org/10.3969/j.issn.1006-267x.2019.05.049

研究简报 Short communications

玉米秸为粗饲料条件下比较羊驼与绵羊养分表观消化率和瘤胃代谢的差异

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  • 山西农业大学动物科技学院, 太谷 030801
赵亚军(1992-),男,山西大同人,硕士研究生,从事反刍动物营养与饲料科学研究。E-mail:601829717@qq.com

收稿日期: 2018-10-26

  网络出版日期: 2019-05-15

基金资助

国家自然科学基金青年基金项目（31201825）；山西省科技攻关项目（20150311017-4）

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Comparison of Differences in Apparent Nutrient Digestibility and Rumen Metabolism between Alpaca (Lama pacos) and Sheep (Ovis aries) under Corn Straw as Roughage Condition

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  • College of Animal Science and Veterinary Medicine, Shanxi Agricultural University, Taigu 030801, China

Received date: 2018-10-26

  Online published: 2019-05-15

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摘要

本研究在玉米秸为粗饲料条件下，比较羊驼与绵羊对2种精粗比饲粮干物质采食量、养分表观消化率、瘤胃环境和总尿嘌呤衍生物排出量等方面的差异。试验选用1岁左右羊驼[体重（25.8±4.7） kg]与绵羊[体重（28.3±5.8） kg]各4只，试验采用有重复的2×2拉丁方设计，分别饲喂精粗比为5：5（MS）和7：3（LS）的饲粮。结果表明：1）羊驼干物质采食量极显著低于绵羊（P<0.01），羊驼对粗脂肪、磷表观消化率极显著高于绵羊（P<0.01）；羊驼瘤胃戊酸、异丁酸和异戊酸含量以及pH极显著高于绵羊（P<0.01），而乙酸含量显著低于绵羊（P<0.05）；羊驼总嘌呤衍生物、尿酸和尿囊素排出量与绵羊间存在极显著差异（P<0.01）。2）羊驼对MS饲粮粗蛋白质、中性洗涤纤维、粗脂肪表观消化率极显著高于LS饲粮（P<0.01），绵羊对MS饲粮干物质、有机物、粗蛋白质、粗脂肪表观消化率显著高于LS饲粮（P<0.05）；羊驼MS饲粮干物质、钙、磷表观消化率极显著低于LS饲粮（P<0.01）。羊驼饲喂MS饲粮瘤胃中pH、异丁酸含量极显著高于LS饲粮（P<0.01），丙酸含量显著高于LS饲粮（P<0.05）；绵羊饲喂MS饲粮瘤胃中异丁酸和异戊酸含量极显著高于LS饲粮（P<0.01），丁酸含量极显著低于LS饲粮（P<0.01）；羊驼饲喂MS饲粮瘤胃中乙丙比显著低于LS饲粮（P<0.05）。2种动物总嘌呤衍生物和尿囊素排出量在2种饲粮间没有显著差异（P>0.05），羊驼饲喂MS饲粮时尿酸排出量显著高于LS饲粮（P<0.05）。综上所述，在玉米秸为粗饲料条件下，羊驼与绵羊对2种精粗比饲粮干物质采食量、瘤胃环境以及表观消化率和总尿嘌呤衍生物排出量等方面均存在一定的差异。

关键词： 羊驼; 绵羊; 玉米秸; 采食量; 瘤胃环境; 表观消化率

本文引用格式

赵亚军, 裴彩霞, 刘强, 张春香, 任有蛇 . 玉米秸为粗饲料条件下比较羊驼与绵羊养分表观消化率和瘤胃代谢的差异[J]. 动物营养学报, 2019 , 31(5) : 2416 -2422 . DOI: 10.3969/j.issn.1006-267x.2019.05.049

Abstract

The aim of this study was to compare the differences in dry matter intake, nutrient apparent digestibility, rumen environment and excretion of total purine derivatives of two diets with different concentrate to corn rubbing stalk ratios between alpacas and sheep. Four 1-year-old alpacas [(25.8±4.7) kg] and four 1-year-old sheep [(28.3±5.8) kg] were used in this study designed as split-plot in two replicated 2×2 Latin square, respectively, and fed diets with different concentrate to corn rubbing stalk ratios [5:5 (MS) and 7:3 (LS)], respectively. The results showed as follows: 1) the dry matter intake of alpaca was significantly lower than that of sheep (P<0.01), and the apparent digestibility of ether extract and phosphorus were significantly higher than those of sheep (P<0.01); the contents of valeric acid, isobutyric acid and isovaleric acid and pH of alpaca were significantly higher than those of sheep (P<0.01), and the content of acetic acid was significantly lower than that of sheep (P<0.05); the excretion of total purine derivatives, uric acid and allantoin had significant differences between alpaca and sheep (P<0.01). 2) The apparent digestibility of crud protein, neutral washing fiber and ether extract of MS diets for alpaca were significantly higher than those of LS diets (P<0.01), and the apparent digestibility of dry matter, organic matter, crude protein and ether extract of MS diets for sheep were significantly higher than those of LS diets (P<0.05); the apparent digestibility of dry matter, calcium and phosphorus of MS diets for alpaca were significantly lower than those of LS diets (P<0.01). The pH and isobutyric acid content of alpaca fed MS diets were significantly higher than those fed LS diets (P<0.01), the propionic acid content was significantly higher than that fed LS diets (P<0.05); the contents of isobutyric acid and isovaleric acid of sheep fed MS diets were significantly higher than those fed LS diets (P<0.01), and the butyric acid content was significantly lower than that fed LS diets (P<0.01); acetic acid/propanoic acid of alpaca fed MS diets was significantly lower than that fed LS diets (P<0.05). The excretion of total purine derivatives and allantoin had no significant differences between two animals (P>0.05), but the excretion of uric acid of alpaca fed MS diets was significantly higher than that fed LS diets (P<0.05). In conclusion, under conditions of corn straw as roughage, there are some differences in the dry matter intake, rumen environment, apparent digestibility and the excretion of total purine derivatives between alpaca and sheep.

Key words： alpaca; sheep; corn stalk; intake; rumen environment; apparent digestibility

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