添加-甘露聚糖酶对肉鸡生长性能、消化率、肠道形态和盲肠微生物群的影响

IF 1.9 3区 农林科学 Q2 AGRICULTURE, DAIRY & ANIMAL SCIENCE
Bárbara Vitória Marçal , Raully Lucas Silva , Larissa Pereira Maria , Renan dos Santos Araújo , Leilane Rocha Barros Dourado , Marcos Kipper da Silva , Nilva Kazue Sakomura
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引用次数: 0

摘要

存在于蔬菜纤维部分的β-甘露聚糖与胃肠道黏度增加、胃排空延迟和营养物质消化率降低有关。考虑到外源性β-甘露聚糖酶对大多数用于治疗和灭活的化学和物理过程的抗性,膳食补充外源性β-甘露聚糖酶可以提供一种替代方法来减轻这种抗营养因子的不利影响。本研究评价了添加β-甘露聚糖酶对肉鸡生长性能、肠道形态、盲肠菌群和消化率的影响。处理为:PC阳性对照(基础饲粮)、NC阴性对照(基础饲粮降低36 kcal/kg代谢能)和NC+βm阴性对照(添加β-甘露聚糖酶)。β-甘露聚糖酶(NC+βm)在第0 ~ 21天的消化能高于PC和NC。22 d时,与十二指肠PC相比,NC+βm表现出更高的消化能(P = 0.043)和绒毛/隐窝比(P = 0.007),表明营养物质吸收增强。43 d时,NC+βm组肉鸡十二指肠绒毛高度和隐窝深度低于PC和NC组(P < 0.001)。在所有指数中,除Simpson指数和Pielou均匀度外,盲肠微生物群的α多样性在β-甘露聚糖酶饲粮中添加43 d时高于22 d (P < 0.01),表明随着时间的推移,肠道微生物生态可能出现正向调节。综上所述,饲粮中添加β-甘露聚糖酶对肉鸡肠道形态、盲肠菌群和总能表观消化率有积极影响,可作为一种营养策略。
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 beta-mannanase supplementation on growth performance, digestibility, intestinal morphometry, and cecal microbiota in broiler chickens
The β-mannans present in the fibrous portions of vegetables are associated with increased gastrointestinal viscosity, delayed gastric emptying, and reduced nutrient digestibility. Dietary supplementation with exogenous β-mannanase could offer an alternative to mitigate the adverse effects of this anti-nutritional factor, given its resistance to most chemical and physical processes used for treatment and inactivation. This study evaluated the effects of β-mannanase supplementation on growth performance, intestinal morphometry, cecal microbiota, and digestibility in broiler chickens. Treatments were as follows: PC positive control (basal diet), NC negative control (basal diet with a reduction of 36 kcal/kg of metabolizable energy), and NC+βm: negative control with the addition of β-mannanase. The β-mannanase supplementation (NC+βm) resulted in greater digestible energy from d 0 to 21 compared to PC and NC. At d 22, NC+βm exhibited greater digestible energy (P = 0.043) and villus-to-crypt ratio (P = 0.007) compared with PC in the duodenum, suggesting enhanced nutrient absorption. At 43 d, broiler chickens on NC+βm had lower (P < 0.001) villus height and crypt depth compared with PC and NC in the duodenum. Across all indices, alpha diversity of the cecal microbiota, except for Simpson's index and Pielou's evenness, was greater (P < 0.01) in 43 d on the β-mannanase diet than at 22 d, indicating a potential positive modulation of gut microbial ecology over time. Based on the results, β-mannanase supplementation can be considered a nutritional strategy for broiler chickens, with positive effects on intestinal morphometry, cecal microbiota, and the apparent digestibility of gross energy.
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来源期刊
Livestock Science
Livestock Science 农林科学-奶制品与动物科学
CiteScore
4.30
自引率
5.60%
发文量
237
审稿时长
3 months
期刊介绍: Livestock Science promotes the sound development of the livestock sector by publishing original, peer-reviewed research and review articles covering all aspects of this broad field. The journal welcomes submissions on the avant-garde areas of animal genetics, breeding, growth, reproduction, nutrition, physiology, and behaviour in addition to genetic resources, welfare, ethics, health, management and production systems. The high-quality content of this journal reflects the truly international nature of this broad area of research.
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