Influence of Replacement Levels of Orange Waste Silage on Intake, Nutrient Digestion, Ruminal Fermentation and Milk Yield in Barki Goats

Abstract Exploring new alternative sources of feedstuffs can contribute to animal production sustainability in some Mediterranean regions order overcome the rising food demand. The influence dietary replacement wheat straw (WS) with orange waste silage (OWS) on nutrient intakes, apparent digestibility, ruminal fermentation and blood biochemical constituents milk dairy goats were evaluated. Forty pregnant (46.30±1.6 kg BW) housed individual pens a completely randomized design fed ( ad libitum ) TMR for 75 days period. Goats assigned four experimental diets forage amounts consisting either WS as control diet (1000 g WS/kg DM TMR), 50:50 mixture both OWS (500 500 OWS/kg an TMR) or corn positive CS/kg TMR). DMI increased linearly (P<0.01), while fiber fractions intake decreased (P<0.01) increasing diet. Ruminal pH was quadratically whereas NH 3 -N concentration total protozoa abundance acetate content (P = 0.012) by diet; linear effects observed propionate butyrate proportions amount increased. Blood urea nitrogen (BUN), non-esterified free fatty acids (NEFA) β-hydroxybutyrate (BHBA) levels ascending OWS. Serum glucose, BUN, NEFA BHBA lower than those CS Milk yield efficiency quadratic 0.049) In conclusion, enhanced rumen late early lactation Barki goats.