The effect of mixed feed of different proportions of bran and tofu residue on the growth characteristics of Hermetia illucens larvas
1 500 4-day-old Hermetia Illucens larvas were randomly selected and evenly divided them into 5 treatments:G1 group(100%bran),G2 group(75%bran+25%tofu residue),G3 group(50%bran+50%tofu residue),G4 group(25%bran+75%tofu residue),and G5 group(100%tofu residue).Weight,length,and projected area were measured daily.The results showed that the G2 group Hermetia illucens larvas had the highest body weight and was significantly different from other groups(P<0.05);the body length of Hermetia illucens larvas in G1 and G2 groups was longer,and its body length was significantly larger than that of other groups;the projection area of Hermetia Illucens larvas in Group G3 was the largest,followed by Group G2 and Group G1;the feed utili-zation rate was highest in the G2 and G3 groups.From the growth curve,it could be seen that most groups of Hermetia illucens Larvas underwent three stages of slow growth,rapid growth,and gentle growth;from the three indicators of weight,body length,and projec-tion area,the G2 group had the characteristics of short delay period and long rapid growth period,with overall good performance at harvest,while the G5 group had poor overall performance.In summary,using a mixture of 75%bran and 25%tofu residue as feed was beneficial for the growth and development of Hermetia Illucens larvas,and this group had the highest feed conversion rate.
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