The nitrogen contents from peptide amino acids in the rumen within 6h after meal in group with FM and group with CGM are higher than those in group with SBM, they are 11.7mgN/L,9.01mgN/L ,1.80mgN/L especially.

• 鱼粉组、玉米蛋白粉组的肽氨基酸氮平均释放量 (采食后 6h内平均数据 )高于豆粕组 ；分别为 11.；7mg氮 L；9