Determination of True Metabolizable Energy Corrected for Nitrogen (TMEn) of Black Soldier Fly Larvae (Hermetia illucens L.) and Nutrient Digestibility and Nitrogen Utilization of Diets Containing Black Soldier Fly Larvae as a Protein Source for Korat Chickens
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Abstract
This study aimed to determine the nitrogen-corrected true metabolizable energy (TMEn) of black soldier fly larvae (BSFL) and to evaluate the effects of incorporating BSFL as a protein source on nutrient digestibility and nitrogen utilization in Korat chickens. The experiment was divided into two parts. In part 1, the TMEn of BSFL was evaluated using 20 mixed-sex Korat chickens (9 weeks old). The birds were divided into 2 groups: a control group (fasted) and a treatment group (force-fed 15 g BSFL per bird). Based on excreta collection and calculation, BSFL had a TMEn value of 3,667 kcal/Kg (DM). In part 2, 35 mixed-sex Korat chickens (6 weeks old) were randomly distributed to 5 treatment groups in a CRD, a control diet and diets containing BSFL at 5, 10, 15, and 20%. The results showed that BSFL could be used as a protein source at inclusion levels up to 20% without negative effects on dry matter, ash, organic matter, and fat digestibility, as well as nitrogen utilization (P>0.05). Moreover, inclusion of BSFL at 15% significantly improved nutrient digestibility and nitrogen utilization compared to the control group (P<0.05). In conclusion, BSFL has a TMEn value of 3,667 kcal/Kg (DM) and can be incorporated as a protein source in Korat chicken diets up to 20% without adverse effects on nutrient digestibility and utilization. However, further studies are recommended to evaluate the effects of BSFL on growth performance and long-term animal health.
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