A feed additive for ruminants, which comprises core containing a carbamate of a basic amino acid and coated with a polymer coating agent soluble or swellable in water in an acidic region of a pH of at most 5.  
                            一种用于反刍动物的饲料添加剂,它由含有碱性
氨基酸氨基甲酸酯并涂有聚合物包衣剂的芯子组成,聚合物包衣剂在 pH 值不超过 5 的酸性区域中可溶于
水或在
水中膨胀。