Influence of different levels of black soldier fly larvae meal on growth performance and carcass quality of broiler chickens

Abstract

A study was conducted to examine the impact of two inclusion levels of Black soldier fly larvae meal (BSFLM) replacing soybean meal on growth performance, nutrient utilization, carcass characteristics and meat quality of broilers. Three experimental diets based on corn-soybean meal were developed to contain 0 (control), 6 (BSF 6) and 12% (BSF 12) BSFLMfor both starter and grower phases. Each experimental diet was randomly allotted to six replicate pens (eight birds per pen). The birds were offered starter pellets from 0 to 14 day post-hatch and grower pellets from 15 to 28 day post-hatch. The experimental diets were tested for pellet durability index (PDI). There was an interaction between diet and growth phase (P < 0.001) for pellet durability index where starter diets had always a higher PDI than the grower diets, but the difference was greater for control diet than BSF 6 and BSF 12 diets. Apparent metabolizable energy (AME) of diets and coefficients of apparent ileal digestibility (CAID) of nutrients were measured on day 28 using titanium dioxide marker ratios in the diet and excreta/ileal digesta. On day 28, the weights of live body, carcass, fat pad, breast and gizzard were recorded, and then breast meat quality (meat pH, drip loss and cooking loss) was examined. Inclusion of BSFLM of up to 12% did not reduce live weight gain or feed intake. Live weight and carcass weight were heavier in broilers fed 12% BSFLM than controls (P < 0.02), but were not different than those fed 6%, while controls were not different than those fed 6%. Breast weight (percentage live weight) was lower in birds offered 12% BSFL than in others (P < 0.04). No differences were observed between diets for the percentage weight as carcass, fat, pad and gizzard. The AME and AMEc of diets were the highest in broilers fed 6% BSFLM diet (P < 0.005), but there were no differences between controls and those fed 12% BSFLM. The CAID of DM, ash and N in birds fed 6% BSFLM were greater than (P < 0.03) birds fed 12%, but were not different than controls, which were also not different than those fed 12%. Broiler breast meat quality was unaffected by dietary treatments. In conclusion, BSFLM at 12% can be used effectively as a SBM replacement in starter and grower diets, without affecting the growth performance, nutrient utilization, carcass characteristics and meat quality of broiler chickens.