补充从肉桂树皮废弃物中提取的不溶性膳食纤维对尼罗罗非鱼(Oreochromis niloticus)幼鱼生长性能的影响

L. H. M. P. R. Lansakara, S. P. Kodithuwakku, S. Himali, J. Vidanarachchi
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摘要

事实证明,补充膳食纤维对鱼类的健康和生长有益。桂皮废料是油蒸馏后的桂皮残渣。它是不溶性膳食纤维的丰富来源,但可溶性膳食纤维含量很低。本研究旨在探讨将肉桂废树皮中的水提取不溶性纤维作为功能性配料添加到黑线鲈幼鱼日粮中的潜力。用提取的膳食纤维替代商品饲料配制了 0(对照组)、0.5%、1% 和 1.5% 水平的四种实验日粮。将黑线鳕幼鱼分配到这四种实验日粮中,并进行了为期 12 周的饲养试验。结果显示,各试验组鱼类的增重、特定生长率、饲料转化率、富尔顿条件因子和存活率均无显著差异。纤维补充量为 1.5%时,粪便中好氧细菌总数显著增加(p<0.05),而纤维补充量为 0.5%和 1%时,粪便中大肠菌群数量显著低于对照组(p<0.05)。补充 0.5% 膳食纤维后,红细胞数量明显增加(p<0.05)。此外,补充不溶性膳食纤维能明显增加血液中的白细胞数量(p<0.05)。结果表明,补充不溶性膳食纤维会影响黑线鳕幼鱼的肠道微生物种群和血液指标。然而,还需要对肠道微生物学和血液学进行进一步研究,以确保将肉桂废树皮中的不溶性膳食纤维作为一种功能性成分用于黑线鳕幼鱼的日粮。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Effects of Supplementation of Insoluble Dietary Fiber Obtained from Cinnamon Spent Bark Waste on the Performance of Nile Tilapia (Oreochromis niloticus) Fingerlings
Dietary fiber supplementation has proven benefits on fish health and growth. Cinnamon spent bark waste is the cinnamon bark residue after oil distillation. It is a rich source of insoluble dietary fiber with very low contents of soluble dietary fiber. This study aimed to investigate the potential of using water-extracted insoluble fiber from cinnamon spent bark waste as a functional ingredient in the diets of Oreochromis niloticus fingerlings. Four experimental diets were prepared by replacing a commercial feed with extracted dietary fiber at 0 (control), 0.5%, 1%, and 1.5% levels. Fingerlings of O. niloticus were assigned to the four experimental diets and the feeding trial was conducted for 12 weeks. The results revealed that the weight gain, specific growth rate, feed conversion ratio, Fulton’s condition factor, and survival rate of fish were not significantly different among the experimental groups. Fiber supplementation at 1.5% significantly increased (p<0.05) the total aerobic bacteria population in feces, whereas the coliform counts in feces at 0.5% and 1% fiber supplementation were significantly lower (p<0.05) than the control. There was a significant increase (p<0.05) in red blood cells count at 0.5% fiber supplementation. Moreover, insoluble dietary fiber supplementation significantly (p<0.05) increased the white blood cell counts in blood. Results suggested that insoluble fiber supplementation affected gut microbial populations and blood parameters of O. niloticus fingerlings. However, further investigations on gut microbiology and hematology are needed to ensure the use of insoluble dietary fiber from cinnamon spent bark waste as a functional ingredient in the diets of O. niloticus fingerlings.
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