The authors studied the impact of tropical theileriosis onset on milk yield decrease in 10 local bred cows in Skikda (No......

啤酒糟中啤酒厂的工业副产品，含有丰富的营养物质，是反刍动物的优势价廉的粗蛋白质饲料，对奶牛饲喂啤酒糟有明显的催奶效果。科学合理......