Evaluating GreenFeed and respiration chambers for daily and intraday measurements of enteric gaseous exchange in dairy cows housed in tiestalls

Abstract

approximation for those measured by RC.Nevertheless, potential underestimation may occur, especially following fresh feed delivery.For measuring CO 2 production and O 2 consumption, the GF captured similar intraday variations to those in the RC.However, the estimated daily production and consumption were not directly comparable, which was expected due to the variable thermal conditions during the summer.Further evaluations under the same weather conditions are warranted.