The Effect of microencapsulated probiotic Lactobacillus sp. AM14 on growth performance, digestibility and body composition of rainbow trout (Oncorhynchus mykiss) fed with diets containing 20 and 40% levels of soybean meal.

Document Type : scientific research article

Authors

1 University Agriculture and Natural Resource, of sari

2 science Committee, University Agriculture and Natural Resource, of sari

3 science Committee University Agriculture and Natural Resource, of sari

4 science Committee Environment University Agricultural Sciences and Natural Resources, of Gorgan

10.22069/japu.2024.22072.1845

Abstract

Alternative sources of fish meal, such as soybean plant protein, have anti-nutritive components such as phytate, which can be reduced by using probiotic bacteria with phytase enzyme. The present study the effect of microencapsulated probiotic AM14 Lactobacillus sp. with phytase activity with sodium alginate and chitosan polymers, on growth, digestibility and body composition of rainbow trout (Oncorhynchus mykiss) fed with diets containing different levels of soybean meal. 360 pieces of rainbow trout (weight 12.43 ± 0.22 grams) with 6 treatments (40% soy + probiotic microcapsulated with sodium alginate and chitosan (T1), 40% soy + free probiotic (T2) 40% soy + capsules made with sodium alginate and chitosan without probiotics (T3), 40% soy + probiotic microcapsulated with sodium alginate (T4), 40% soy without additives (C2), 20% soy without additives (C1)) were fed.
The results showed that T1 treatment had a significant improvement in all growth indicators, body composition and digestibility compared to the control group containing 20 and 40% soybeans without additives (p<0.05). In treatment C2, growth indices, body composition and digestibility showed a significant decrease compared to C1 (p<0.05). Considering the significant improvement of growth indicators, body composition and digestibility in the treatment fed with a diet containing 40% soy and additives, the probiotic AM14 Lactobacillus sp. with phytase activity in a microencapsulated form can be suggested as an efficient microencapsulated probiotic strain for use in aquatic diets in order to increase the percentage of replacing fish meal with vegetable protein sources.

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Journal of Utilization and Cultivation of Aquatics
Volume 14, Issue 1
April 2025
Pages 69-90

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