GRADUAL SUBSTITUTION OF REED SILAGE WITH ALFALFA HAY FED WITH OR WITHOUT PROBIOTIC TO AWASSI LAMBS. 3-Some blood parameters

Abstract

ABSTRACT
In this study, twenty four individual awassi male lambs (mean weight kg and 3-4 months of old) were used to investigate the effect of three ratios of alfalfa hay to reed silage (40:0, 20: 20 and 0: 40 H: S ratios) fed with two levels of Iraqi local probiotic (IP) (0 and 7.5 g IP / kg DM) on daily feed intake, live-weight gain (LWG) and some blood parameters during 63 days feeding trial. The diets were formulated as DM to give a 40 parts alfalfa hay or/and reed silage and 60 parts concentrate. Within 2-3 days before ending the period, blood samples were taken for measuring Packed Cell Volume (PCV), blood protein (BP), blood sugar (BS) and blood urea nitrogen (BUN) concentration. Then all lambs were slaughtered and their carcasses were dissected into lean, fat and bone tissue. No differences among treatments were found in daily feed intake for all nutrients. Substitution gradual percentages of reed silage with alfalfa hay have no effect on live weight gain, BUN, PCV, BP and BS. Lambs fed diets with IP tended to increase live weight gain, blood PCV and BP and decrease blood urea concentration as compared with those fed diets without IP. In conclusion, substitution reed silage with alfalfa hay has no effect on LWG and blood parameters. Additives of IP were associated with higher LWG, lean tissue and lower BUN concentration.