Soybean meal is one of the feed ingredients that is still imported, so indigofera leaf flour is tried as an alternative to local feed ingredients to reduce feed costs. The purpose of this study was to determine the effect of indigofera leaf flour (Indigofera sp.) as a substitute for soybean meal on growth performance on enlargement of striped catfish (Pangasianodon hypophthalmus). This study used a completely randomized design with 4 treatments and 3 replications. P1 (without substitution of indigofera leaf flour), P2 (substitution of soybean meal with 10% indigofera leaf flour), P3 (substitution of soybean meal with 20% indigofera leaf flour), P4 (substitution of soybean meal with 30% indigofera leaf flour). The data obtained were analyzed using analysis of variance (ANOVA) and further tested with Duncan's test. Based on statistical analysis, the test feeding had a significant effect (p<0.1) on absolute weight growth, specific growth rate, and feed efficiency and the yield was not significantly different (p>0.1) on absolute length and survival rate of fish. The results showed that the use of indigofera leaf flour as a substitute for soybean meal up to a limit of 20% was able to provide a relatively better growth performance than 30%.

Feed is one of the most important aspects that cannot be left out in the fish farming process. One of the problems often faced by cultivators is the high price of feed due to the use of imported raw materials, such as soybean meal flour. To reduce the use of soybean meal flour, a new innovation was carried out in the form of substitution of local raw materials, namely Indigofera sp. This study aims to determine the effect of TDI (Indigofera sp.) as a substitute for soybean meal flour on growth performance on rearing red tilapia (Oreochromis sp.). This study used a completely randomized design with 4 treatments and 3 replications. P1 (without TDI usage), P2 (10% TDI usage), P3 (20% TDI usage), P4 (30% TDI usage). The data obtained were analyzed using analysis of variance (ANOVA) then further tested with Duncan's test. Based on statistical analysis, the test feed had a significant effect (p<0.1) on FCR was not significantly different (p>0.1) on the growth of absolute weight, absolute length, SGR, and SR of fish. The result of this study is that the use of TDI (Indigofera sp.) can be used up to a dose of 30% as a substitute for soybean meal flour in red tilapia feed, because it produces the same absolute weight growth, absolute length growth, SGR, and SR as the control feed.