Abstract

RESPONSE OF BROILER CHICKS TO GRADED LEVELS OF DIETARY PREBIOTIC Y-MOS (PYM).

Igbal Eltayeb Musaad, Mukhtar Ahmed Mukhtar* and K. A. Mohamed

ABSTRACT

This experiment was carried out to evaluate the response of broiler chicks to diet containing various levels of dietary prebiotic Y-MOS (PYM) as natural growth promoter. Experiment parameters covered growth performance, carcass characteristics, serum attributes and economic appraisal of broiler chicks. The experimental design used was complete randomize design (CRD). A total of 210, seven days old 185g initial weight, un sexed Cobb strain broiler chicks were used. The chicks were divided into 4 experimental groups with five replicates, each of seven chicks (4x5x7). The first group A fed on basal diet without feed additives as control diet, the other groups B, C, and D were fed on basal diet supplemented with (PYM) at levels 0.5, 1.0 and 1.5g/kg respectively. The results showed that, no mortalities were recorded throughout the experimental period.The results indicated that, addition of dietary (PYM) at all inclusion levels improved significantly (p≤0.05)the performance of broiler chicks compared to control, while no significant differences (p≥0.05) in terms of feed intake, however the inclusion level 1.5g/kg (PYM) recorded the best performance. The results also, reveal that, the levels of inclusion 1.0 and 1.5g/kg (PYM) had recordedsignificantly (p≤0.05) the best carcass dressing percents. Results showed no significant differences (p≥0.05) among all treatment groups in commercial cuts and their meat (breast, thigh and drumstick) and the subjective and objective meat quality attributes, the same trend for serum metabolites (total protein, creatinine, uric acid, urea, cholesterol and triglyceride), serum enzymes (AST and ALP) and serum minerals (Ca and P) of broiler chicks. The results of economical evaluation of experimental diets showed that the addition of (PYM) at various levels in broiler diets economically profitable compared to control, but the value of profitability ratio 1.67 of group 1.5g/kg (PYM) was the highest of the tested groups. According to the results of this study, dietary (PYM) can be used as natural growth promoters to replace antibiotics.

Keywords: Prebiotic Y-MOS, performance, carcass traits and blood parameters, natural feed additive.