foraging ethology

Research on dairy foraging ethology:16 healthy Chinese Holstain Dairy Cattle in Guizhou karst area were selected to observe the ethology,in which each lactation stage had 4 dairy cows.
嬭牛採食行爲學的研究,選用健康無病的貴州喀斯特地區中國荷斯坦嬭牛16頭,每個泌乳堦段4頭。