A.0.25%~0.5% B.0.1% C.1%~2% D.3%~5%
A.鈉 B.銅 C.鎂 D.硫
A.維持滲透壓,酸堿平衡 B.抑制神經(jīng)和肌肉的興奮性 C.活化消化酶 D.提高畜禽食欲