for high quality roughages, Alfalfa hay,Astragalus absurgens, Wild pean stems ,Wheatgrass, Dahurian wildrye, Brome were 0.31 -. 0.27.. 0.21..

• 优质粗饲料中400mg苜蓿、沙打旺、肋麦野豌豆、冰草、披碱草、雀麦体外培养24小时的丙酸产量分别为0.；31、0