A novel indirect calorimeter system for measuring gas exchange and determining digestibility, nutrient retention, and net energy in diets fed to group-housed pigs.

IF 2.5 2区 农林科学 Q1 AGRICULTURE, DAIRY & ANIMAL SCIENCE
Cristhiam Joseph Munoz Alfonso, Hans Henrik Stein, Su A Lee
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引用次数: 0

Abstract

A novel indirect calorimeter chamber system has been built at the University of Illinois Urbana-Champaign (IL, USA). The unit consists of 6 respiration-metabolism chambers where temperature and humidity are controlled, gas analysis units, a data management unit, a mechanical room, and an air-conditioned feed storage room. The chambers are airtight and each chamber has the capacity to hold more than 1 pig depending on size. Using the system, concentrations of digestible energy, metabolizable energy, and net energy, and digestibility and retention of nutrients can be determined in diets fed to pigs on an ad libitum basis. A recovery test was performed using propane combustion. The recovery rate of oxygen ranged from 86.7 to 108.7% with a mean of 99.0% and a coefficient of variation of 6.27%. The recovery rate of carbon dioxide ranged from 100.0 to 101.0% with a mean of 100.6% and a coefficient of variation of 0.29%. In summary, a novel calorimeter unit allows for pigs to be group-housed and given ad libitum access to feed and water. This system is believed to be representative of commercial settings, and therefore, net energy can be determined in diets fed to pigs under conditions similar to those used in commercial production.

一种新型间接量热计系统,用于测量群养猪饲粮中的气体交换和测定消化率、营养保留率和净能量。
在伊利诺伊大学厄巴纳-香槟分校(IL, USA)建立了一种新型的间接热量计室系统。该装置由6个温度和湿度控制的呼吸代谢室、气体分析单元、数据管理单元、机械室和空调饲料储藏室组成。室是密闭的,每个室有能力容纳1头以上的猪取决于大小。利用该系统,可以随意测定饲粮中猪的消化能、代谢能和净能浓度,以及营养物质的消化率和保留率。采用丙烷燃烧法进行了回收试验。氧的回收率为86.7 ~ 108.7%,平均为99.0%,变异系数为6.27%。二氧化碳回收率为100.0 ~ 101.0%,平均为100.6%,变异系数为0.29%。总之,一种新型的热量计单元允许猪群饲养,并给予自由获取饲料和水。该系统被认为是商业环境的代表,因此,在与商业生产中使用的条件相似的条件下,可以确定猪饲料中的净能量。
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来源期刊
Animal Bioscience
Animal Bioscience AGRICULTURE, DAIRY & ANIMAL SCIENCE-
CiteScore
5.00
自引率
0.00%
发文量
223
审稿时长
3 months
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