System for measuring metabolic gas emissions from animals

摘要: A system is disclosed which measures the flux of metabolic gas emissions from cattle or other animals The does not require that be confined to a chamber stall. An animal whose are measured first fed permeation tube (a metal with gaspermeable plastic disk in one end). Inside tracer physiologically inert. filled pressurized liquid slowly permeates (in gaseous form) through disk. In order measure rumenproduced gases, sample container, such as an evacuated container inflatable collar placed on animal. small diameter attached halter and terminates somewhere near animal's mouth. When breathes, it exhales gases well tracer. air containing both then collected tube. Since rate known constant, ratio given equal mixing ratios respective collected. rumen thus readily calculated by measuring