Use Of Fermented Tarum (Indigofera Zollingeriana) Leaf Flour From Aspergillus Niger On Growth Performance Of Jaya Sakti Carp Larvaes

Tarum leaves (Indigofera zollingeriana) are an alternative local raw material that can be used as fish feed. I. zollingeriana has a fairly good protein content, namely 29.06%, which is needed for fish growth. The use of I. zollingeriana is faced with the obstacle of a high fiber content of 15.25%, which reduces feed digestibility and inhibits fish growth. Efforts to overcome this problem are through a fermentation process, one of which uses Aspergillus niger. Research was conducted to determine the use of I. zollingeriana leaf meal fermented by A. niger in feed on the growth performance of Jaya Sakti goldfish (Cyprinus carpio, L). The design used in this research was a completely randomized design (CRD) consisting of 4 treatments, namely the use of I. zollingeriana leaf flour fermented by A. niger in feed at 0%, 15%, 30% and 45% and 4 treatments each. test. The test fish used were 7-8 cm long, weighed 8-9 grams, 20 fish/m3 in happa measuring 2x2x1 m3 and each equipped with aeration. The test fish were fed at a feeding rate of 7%/BW with a feeding frequency of 5 times a day. The results of the research showed that the best specific growth rate (SGR) value was the use of 0% fermented I. zollingeriana leaf flour (control) of 1.46%/day. Utilization of 15% fermented I. zollingeriana leaf flour gave the highest specific growth rate (SGR) value (1.09%/day) compared to 30% utilization (0.91%/day) and 45% utilization (0.65%/day). Business analysis is based specifically on feed costs using FCR calculations, where commercial feed provides higher profits (Rp. 5,320/kg). Utilization of 30% I. zollingeriana leaf flour fermented by A. niger can provide higher profits (Rp. 3,305/kg) compared to 15% (Rp. 2,579/kg) and 45% (Rp. 667/kg)