Rice bran is the result of the process of milling rice plants into rice, but rice bran has not been utilized properly in the Sidrap area. Feeding with the addition of fermented rice bran using Lactobacillus sp. is expected to increase the use of feed in tilapia aquaculture. This research aims to realize the fermentation of rice bran on the survival parameters and feed conversion ratio (fcr) of tilapia. This research used a completely randomized design with three replications and four treatments, namely (A) 10% dose of rice bran in feed, (B) 15% dose of rice bran in feed, (C) 20% dose of rice bran in feed, and (D) control. feed. The size of the tilapia used is 1.5 g / fish with a density of 20 individuals / 85 L of freshwater. The number of feeding four times a day and given a test feed of 5% of the bodyweight of the fish. The results showed that the bran flour was fermented using Lactobacillus sp. Significantly different in the survival rate and the ratio of tilapia feed conversion and water quality during the study is suitable for use in tilapia fish maintenance. The highest value resulting from the addition of fermented rice bran 15% (18.33) and 20% (19.33) for survival, while the lowest for control (16.67) and feed conversion ratio showed the best results with the provision of fermented rice bran 20 % (3.03).
Nuts contain oligosaccharides which can function as prebiotics. Prebiotics are fibers that the body cannot digest and become food for probiotics. This study aimed to analyze the bacterial population, enzyme activity and feed conversion ratio of milkfish after being given various prebiotics from legumes in the feed. Milkfish measuring 4.13 ± 2.75 g are reared in a glass aquarium measuring 50 × 45 × 45 cm filled with water with a salinity of 15-20 ppt. Fish are maintained at a density of 15 individuals/aquarium for 60 days and are fed 5% body weight/day. The study was designed in a completely randomized design with 5 prebiotic treatments of soybeans, peanuts, green beans, kidney beans, and control. The results showed that the treatment had a significant effect (p <0.05) on the bacterial population, as well as the protease and amylase enzyme activity, but not on FCR. The highest bacterial population was red bean prebiotics (2,082 × 103 CFU/mL), followed by green beans (2,001 × 103 CFU/mL), soybeans (972 × 103 CFU/mL). The highest activity (0.243 u/mL) and amylase enzyme (0.745 u/mL) was the prebiotic kidney beans, followed by soybeans (0.236 u/mL) amylase enzyme (0.506 u/mL), peanuts, protease enzymes (0.129 u/mL) amylase enzyme (0.554 u/mL) and green bean protease enzyme (0.156 u/mL) amylase enzyme (0.543 u/mL). Meanwhile, the FCR ranges from 1.43 ±.0.85 to 2.87 ±.1.70. It can be concluded that the best type of prebiotic is red beans.
Tofu dregs are industrial waste that can be used as a source of carbohydrates. However, its use in feed formulations is limited because it contains high crude fiber and low quality. The fermentation process uses a mix of microorganisms. proven to improve the nutritional quality of tofu pulp. This study ams to determine the dosage of fermented tofu pulp in feed against feed amino acids, nutrient digestibility and juvenile food conversion ratio (FCR) of vaname shrimp. The study was designed in a completely randomized design with treatment of 4 doses of fermented tofu pulp in the feed, namely 5, 10, 15 and 20%. The feed was given as much as 10% of total body weight/day to juvenile vaname shrimp measuring 0.5 g per individual kept in a glass aquarium with 20ppt media passage for 60 days. Amino acid measurement results are within the range sufficient for the needs of vaname shrimp. Analysis of variance showed that treatment had a significant effect on total digestibility, protein, crude fiber, carbohydrates and fat, but not on FCR. The highest yield was shown at a dose of 15% protein digestibility (85.62±1.576), crude fiber (87.30±1.117), carbohydrates (90.67±1.231) and a dose of 20% fat digestibility (98.75 ± 0.070) and total digestibility ( 79.70±0.222), the FCR ranges (3.237±.0.35) to (4.141±.0.64). The dosage of fermented tofu dregs with mixed microorganisms can be used 15% in the feed formulation.
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