Effect of rumen liquid and Bacillus sp. on improving the quality of fish feed, using the predigested system

Abstract

Abstract The main objective of this research is to improve the nutritional content of fish feed with a predigest system. The predigest system involved microorganisms consisting of rumen fluid and Bacillus sp. The research was conducted in vitro using a completely randomized design method with a factorial pattern. Two main factors were the dose of mixed microorganisms (0, 3, and 4.5mL/100g) and the length of incubation time (15, 30, and 45 minutes). The results showed that pre-digestion of fish feed with a dose of 4.5 mL/100g of mixed microorganisms with an incubation time of 15 minutes significantly affected (P<0.05); there was an interaction between the two. There was an improvement in protein levels, nitrogen free extract, dry matter digestibility and organic matter. On the other hand, there is a reduction in the levels of crude fibre and ash. Research conclusion: A dose of 4.5mL/100g and a fermentation time of 15 minutes produced high nutritional value and was recommended as a raw material for feeding fish.

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