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The main objective of this work aimed to investigate the impact of incorporation apricot seed kernel (ASK) in rabbit rations on their digestion coefficients, nutritive values, performance, carcass characteristics, and blood constituents (hematology and biochemistry). Forty-five New Zealand White (NZW) rabbits aged 5–6 weeks (730 ± 23 g) were divided into five groups (9 rabbit in each group) for 72 days. The first experimental ration considered the control (R1) that not contained apricot seed kernel (0% ASK). The 2nd, 3rd, 4th, and 5th experimental rations contained 0.75, 1.5, 3, and 4.5 % for R2, R3, R4, and R5, respectively. ASK had no significant effect on the nutrient digestibility except for EE and nutritive values. Incorporating ASK at different levels significantly (P < 0.05) increased average daily gain (ADG) and feed conversion ASK at different levels had no effect on both digestive tract and head weights, while giblets and carcass weights were increased (P < 0.05) compared to the control (R1). Rations contained ASK with level 0.75, 1.5, and 3% were significantly (P < 0.05) increased crude protein content of best 9th, 10th, and 11th ribs. Meanwhile, R2, R3, and R4 significantly (P < 0.05) decreased ether extract content of best 9th, 10th, and 11th ribs. Inclusion ASK had no significant difference on red blood cell count (RBCs), white blood cell count (WBCs), packed cell volume percentages (PCV), hemoglobin concentration, mean corpuscular volume (MCV), mean corpuscular hemoglobin (MCH), and mean corpuscular hemoglobin concentration (MCHC). However, levels of ASK (0.75, 1.5 and 3%) were significantly (P < 0.05) decreased eosinophils. Both basophiles and lymphocytes counts were significantly (P < 0.05) increased with ASK (R4). ASK had no significant effect on total protein, albumin, ALT, total cholesterol, triglycerides, urea, and creatinine. Meanwhile, rabbits received ration contained 4.5% ASK (R5) significantly (P < 0.05) increased total globulins and AST contents. From the data obtained and under the same condition for this study, it can be concluded that, apricot seed kernel can be used safety as an alternative source of protein used to rates reach up to 4.5% without adverse effects on growth rates, feed consumption, digestion coefficients, nutritive values, carcass characteristics, and blood constituents.

Incorporation apricot seed kernel as untraditional source of protein in rabbit rations