Abstract:
In Sri Lanka, meat industry plays a key role in livestock sector where chicken meat
contributes about 70%. However, economically, meat production would allocate
nearly 80% of total cost of production especially in terms of crude protein for the
animal feed causing profit chains to be in pressure. In this context, Black Soldier Fly
(Hermetia illucens) Larval (Larval (BSFL) meal has been identified as one of the
exceptional protein sources to substitute for some key protein ingredients in animal
feed. Black soldier fly larval meal comprises around 42% crude protein and 29%
crude fat with an excellent amino acid profile. No studies have been conducted
locally so far, to assess the potential of substituting BSFL for one of the major
imported protein sources, fish meal. Basically, the objectives of the proposed study
are to assess the nutritional composition and the Apparent Metabolizable Energy
(AME) of BSFL reared on kitchen waste and to assess the maximum inclusion levels
of BSFL in broiler diets. The BSFL will be reared on kitchen waste in a BSFL based
compost bin. Substrate and the pre-pupae samples will be subjected to analyze for
the nutritional composition in duplicates. AME of BSFL meal will be estimated by
using acid insoluble ash (AIA) as aninertan inert marker, with 80, 21-day old
commercial broilers using a pre-formulated reference diet, 5%, 10% and 15% BSFL
substitutions of reference diet. Feed samples and excreta samples will be analysed
for gross energy and AIA. To assess the maximum inclusion level of BSFL in broiler
grower and finisher diets, nine isoenergeticis energetic and isoproteic diets
containing full-fat and defatted BSFL at 0%, 2.5%, 5%, 7.5% and 10% will be used
to feed 324 birds. The nutritional composition of each diet, weekly feed intake, body
weight gain, feed conversion ratio and mortality will be determined. Forty-two days
old broilers will be subjected to analyze the meat characteristics for number of
sensory properties by 30 untrained panelists using a predesigned questionnaire. A
cost benefit analysis will be carried out in terms of feed cost per kg live weight gain
to find out the most economical inclusion level.
