精准饲喂对个体奶牛甲烷排量的影响OA北大核心

Methane emissions from ruminant cows are one of the main sources of greenhouse gas emissions from agricul-ture,and feed intake is an important factor affecting individual cow methane emissions.Developing a precise feeding sys-tem and methane detection device for individual cows to analyze the impact of cow feed intake on methane emissions is of great significance for improving cow health,improving feed utilization,and enhancing scientific feeding and management capabilities.This article studied and designed a precise feeding system and methane detection device for individual dairy cows.By combining the wearable cow clothing of individual dairy cows with the fixed installation of the main framework distribution network in the pasture,the methane emissions in the hindgut of four cows in the control group and the experi-mental group before and after feeding,as well as the methane emissions in the belching and breathing of cows,were col-lected.Research had shown that the precision feeding system for individual cows can achieve quantitative feed based on individual differences.Under the same conditions,there was a difference in methane emissions and milk production be-tween precision fed and freely fed individual cows,but it was not significant.However,as individual cows increase their feed intake,methane emissions will increase,indicating a positive correlation between feed intake and methane emis-sions.