Nutrient digestibility and blood profile of broiler chickens fed fermented sweet orange peel-based diets
Esther Taiwo1, Oluwabiyi Oluremi2, Kenan Orayaga3
1Swedish University of Agricultural Sciences, Dept. of Animal Breeding and Genetics, Germany
The research aimed to determine the nutrient digestibility and blood profile of broiler chickens fed biodegraded sweet orange peel-based diets in Nigeria. The sweet orange peels were obtained from retail sellers while fresh rumen content was procured from a government abattoir. Rumen content was mixed with water in the ratio of 1 kg : 1 litre, and the resultant mixture was sieved to obtain rumen filtrate (RF). The rumen content was mixed with sweet orange peels at the ratio of 1 litre : 2.5 kg respectively. The mixture was then fermented for 48 hours, sun-dried, milled, and incorporated into the broiler diets at starter and finisher phases as a replacement for maize at levels of 0% (T1), 5% (T2), 10% (T3), 15% (T4) and 20% (T5). The experiment involved a fifty-six-day feeding trial, where a hundred and fifty-day-old chickens were randomly assigned to five dietary treatments, and each was replicated three times in a completely randomised design. The results showed that the coefficient of digestibility of dry matter, crude protein, crude fibre, ether extract and nitrogen-free-extract did not differ significantly (p>0.05) among the treatment groups, while, as retention differed significantly (p<0.05) across the treatment groups haematological indices; haemoglobin, red blood cell (RBC), packed cell volume, mean corpuscular volume (MCV) and mean corpuscular haemoglobin (MCH), did not differ significantly (p>0.05) across the dietary groups, white blood cell (WBC) and mean corpuscular haemoglobin concentration (MCHC) varied significantly (p<0.05), serum indices; total protein (TP), globulin, glucose, cholesterol, and alkaline phosphatase, were significantly affected (p<0.05) by the experimental diets, while albumin, aspartate transaminase, and alanine transaminase did not differ significantly (p<0.05) across the dietary groups. Sweet orange peel-based diets can replace maize up to 20% without affecting nutrient digestibility or having any deleterious effect on the blood parameters of broiler chickens.
Keywords: Blood profile, broiler chickens, fermentation, nutrient digestibility, rumen filtrate
Contact Address: Oluwabiyi Oluremi, The National University of Lesotho, Roma, Lesotho, Dept. of Animal Science, Roma, 180 Maseru, Lesotho, e-mail: oiaoluremiyahoo.com