Equi-protein Replacement of Fishmeal with Leucaena Leaf Protein Concentrate: An Assessment of Performance Characteristics and Muscle Development in the Chicken

摘要

A batch of three hundred 7- day old Shaver broiler-chicks was used to assess the equi-protein replacement of fishmeal (FM) protein with Leucaena leaf protein concentrates (LLPC) in broiler-starter mash. Before the feeding trial, the LLPC was analyzed for its protein, amino acid s, phytin and tannin contents. Thereafter, five diets were tested. The control (diet 1) had 5% FM protein whose protein was gradually replaced at 25, 50, 75 or 100% with LLPC in diets 2 to 5. Thus the inclusion level of LLPC was 2.24, 4.48, 6.72 or 8.96%, respectively for diets 2 to 5. The chicks were randomly assigned in triplicate of 60 chicks per dietary treatment. The average weight gain (AWG), average feed consumption (AFC) and feed conversion ratio (FCR) of chicks fed the control diet were significantly (P carcass traits , relative organ and muscle measurements as well as blood and serum analyses. Only the weights of the chest, belly fat, spleen, pancreas and gizzard were significantly (P Supra coracoideus, Pectoralis thoracicus and Gastrocnemius of chicks fed the control diet and those fed LLPC-based diets were similar. The blood variables and the total serum protein (TSP) of the chicks fed the control diet were not significantly (P>0.05) different from those fed the LLPC-based diets. In the main, the use of 2.24% LLPC in broiler-chick diets, especially in region with limited supply of fishmeal, in a complementary fashion with other ingredients rich in the limiting essential amino acid s (EAAs) is suggested.