성장 단계별 갈색거저리 유충을 돈분에 첨가시 조회분과 조지방 함량 변화에 대한 조사

This study evaluated changes in crude ash and crude fat content in pig manure during the rearing period of Tenebrio molitor (TM) larvae by incorporating the larvae at different growth stages. The treatments were categorized into three groups: T1) 2000 g of pig manure plus 500 g of 3^th-instar TM larvae, T2) 2000 g of pig manure plus 500 g of 4^th-instar TM larvae, and T3) 2000 g of pig manure plus 500 g of 5^th-instar TM larvae. In terms of crude ash content, significant differences among the treatment groups were observed only at days 0 and 15 (p<0.05), and all treatment groups exhibited an increasing trend over time. Among the treatment groups, the 4^th-instar larvae showed the highest crude ash content, whereas the 3^th-instar larvae had the lowest. Changes in the crude fat content were influenced by all treatment groups, except for the analysis conducted on day 30 (p<0.05). The crude fat content increased in the order of 3^th-instar < 4^th-instar < 5^th-instar. These differences may be attributed to variations in the decomposition capability of TM larvae at each developmental stage. In conclusion, considering the importance of crude ash content as a nutrient in the composting process of pig manure, the application of 4^th-instar TM larvae was deemed the most effective.