手法を比較

	乳量測定記録	飼料転換率
分野	畜産学	畜産学
系統	Process / pipeline	Process / pipeline
提唱年	1920s	1950s
提唱者	Dairy Scientists	Animal Nutrition Scientists
種類	measurement and data collection	efficiency calculation and analysis
原典	Dhiman, T. R., & Tormanen, M. (2015). Effects of grain and hay on milk yield in lactating dairy cattle. Journal of Dairy Science, 78(5), 1066-1075.	Blaxter, K. L. (1989). Energy metabolism in animals and man. Cambridge University Press.
別名	milk production monitoring, lactation recording	feed efficiency ratio, gain-to-feed ratio, FCR analysis
関連	3	3
概要	Milk yield recording is a systematic method for measuring and documenting the volume of milk produced by individual dairy animals across lactation cycles. Formalized in the early 20th century by dairy scientists including W. L. Gaines, the practice forms the backbone of modern dairy herd management and genetic improvement programs. It enables objective assessment of production performance and identification of high-producing animals for breeding.	Feed conversion ratio (FCR) is a key metric of nutritional efficiency in livestock, measuring the amount of feed consumed relative to animal growth or product output. Developed by animal nutrition scientists in the mid-20th century, FCR quantifies how efficiently livestock convert dietary nutrients into meat, milk, eggs, or other products. It is a primary driver of profitability in commercial animal agriculture and a focus of genetic selection in breeding programs.