Abstract:
Currently, there is a great interest in finding cost-effective feed ingredients to enhance
growth performances in swine. Black soldier fly larvae (BSFL) (Hermetia illucens)
can be used to produce protein and fat-rich biomass which can be included in swine
feed. This study aimed to formulate a cost-effective swine feed incorporating BSFL.
Two isocaloric and isonitrogenous swine rations; Treatment 1 (T1) 87% BSFL
incorporated swill, and Treatment 2 (T2) 28% fishmeal incorporated swill were
prepared according to the NRC recommendations. Swill feeding (T3) was considered
as the control diet. A mixture of scrapped vegetables, fruits and Samaposha® was used
as the substrate (Crude protein 18.63% and energy 2987 kcal kg-1
) for BSFL
production. A feeding trial was conducted in the end according to the randomized
complete block design using weaner swine to test the growth performances. The data
collected and calculated include; weekly and monthly average body weight (ABW),
average body weight gain (ABWG), feed conversion ratio (FCR), and cost-benefit
analysis against the three rations. Results showed that T1 had a higher (p<0.05) ABW
(12.87±0.44 kg) compared to the other two treatments and ABWG was higher
(p<0.05) in T1 (5.45±0.63 kg) compared to T2 (3.81±0.29 kg) which in turn was
higher (p<0.05) than T3 (3.38±0.31 kg). The lowest (p<0.05) FCR was reported in
T1 (4.19±0.42) compared to T2 (5.92±0.36) which in turn was lower (p<0.05) than
T3 (6.85±0.39). The highest (p<0.05) feed cost was reported in T2 (9083±0.00 LKR)
compared to T1 (5500±0.00 LKR) which in turn was higher than T3 (5000±0.00
LKR). The cost-benefit ratio was higher in T1 (3.28±0.04) compared to T3
(2.95±0.06). The lowest cost-benefit ratio was observed in T2 (1.68±0.01). In
conclusion, BSFL-incorporated feed (T1) is more effective in enhancing the growth
performances of the weaner swine while offering the highest cost-benefit ratio.
