There was obvious inadequacy of Na on winter, spring and summer pasture, but ex-cessive on autumn pasture at No 2 Altai farm.

• 含Na量在塔城种羊场一年四季草场均缺乏，在阿勒泰二牧场冬、春、夏草场Na出现明显缺乏，而在秋草场又明显超出需要量；