
Keywords: NEL، انرژی خالص برای شیردهی; ADF, acid detergent fibre; CP, crude protein; DM, dry matter; EE, ether extract; FA, fatty acids; aNDF, neutral detergent fibre; NEL, net energy for lactation; TTAD, total tract apparent digestibilityDairy cows; Flaxseed; Digestion; Fatty acids; Feeding l