Livestock Nutrition

Biography

Biography: Arfan Gulzar

Abstract

The objective of this study was to explore the nutritional efficiency of different levels of distillery yeast sludge (DYS) on cellular immunity and performance in broiler chicks. One thousand day-old broiler chicks were used in Completely Randomized Design and were distributed into five groups each having two hundred chicks. Each group was further sub-divided into four replicates with fifty chicks per replicate. Five iso-nitrogenous (23% CP) and iso-caloric (3000 Kcal/kg) starter (day 1-28) rations were formulated containing 0, 5 10, 15 and 20 % DYS replacing soybean meal (SBM) on nitrogen equivalent basis and were denoted as C (control), 5DYS, 10DYS, 15DYS and 20DYS, respectively. Similarly five iso-nitrogenous (21% CP) and iso-caloric (3100 Kcal/kg) finisher (day 29-42) rations were formulated with same proportion of DYS replacing SBM. Results revealed that feed intake was not different among different experimental diets (P < 0.05). Average feed intake in six weeks period in birds fed C, 5DYS, 10DYS, 15DYS and 20DYS diets were 3508, 3463, 3462, 3593 and 3589 grams, respectively. However, weight gain was higher (P < 0.05) in broilers fed 5DYS diet compared with other dietary groups. In cumulative phase the average weight gain values in birds fed C, 5DYS, 10DYS, 15DYS and 20DYS diets were 1781, 1794, 1780, 1783 and 1715 g, respectively. Feed conversion ratio (FCR) was improved in C, 5DYS, 10DYS and 15DYS diets compared with 20DYS diet in cumulative phase. Average FCR values were 1.97, 1.93, 1.95, 1.97 and 2.09 in birds fed C, 5DYS, 10DYS, 15DYS and 20DYS diets, respectively. The average values of cellular immune response in birds fed C, 5DYS, 10DYS, 15DYS and 20DYS diets were 0.21, 0.22, 0.24, 0.23 and 0.22 micrometer. Results on cellular immunity revealed no difference among all diets in cellular response as measured by the amplitude of toe web swelling at 24, 48 and 72 hours after injection of Phytoheamagglutinin-P. It is concluded that DY