Optimal Inclusion Levels of Cricket and Silkworm as Alternative Ruminant Feed: A Study on Their Impacts on Rumen Fermentation and Gas Production

Due to growing interest in alternative and sustainable high-quality feed sources for the livestock industry, we carried out a study determine optimal inclusion levels of two insect species (Gryllus bimaculatus Bombyx mori) ruminants, as well evaluating their impacts on rumen fermentation characteristics methane production. An experiment was performed using an vitro model 24 h with ruminant diet (control group) 60%:40% grass:concentrate, order investigate effects into at 10, 20, 30, 40%, through substitution concentrate mixture. The parameters indicated that each could be included up 20% without adverse nutrient digestibility, while increasing production ammonia-nitrogen. Increasing level beyond led significant decreases (p < 0.05) total gas production, volatile fatty acids due high fat content these dietary treatments. Therefore, G. B. mori used 20%, replace ingredients. Formulating insects ingredients should take consideration content.