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首页> 外文期刊>Poultry Science >Metagenomics analysis reveals significant modulation of cecal microbiota of broilers fed palm kernel expeller diets
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Metagenomics analysis reveals significant modulation of cecal microbiota of broilers fed palm kernel expeller diets

机译：Metagenomics分析揭示了饲喂Palm Kernel Expeller Diets的肉鸡CeCal Microbiota的显着调节

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The potential use of palm kernel expeller (PKE) as an alternative energy source in broiler diets is limited by the high fiber content. Although enzymatic treatment could alleviate the fiber component and increase the nutritive value of PKE, this apparent improvement is not reflected in the growth response of birds fed with the treated-PKE. As chicken's ceca are the most heavily populated with microflora within their gastrointestinal tract, it was hypothesized that any modulation of the intestinal environment by dietary treatments should be reflected by the composition and activities of the cecal microflora. There is a correlation between cecal microbiota composition and the efficiency of the host to extract energy from the diet and to deposit that energy into improved feed conversion ratio. At present, little is known about the changes on cecal microflora of broilers fed with PKE diets. Hence, this study was designed to assess the effects of feeding different forms of PKE; namely untreated PKE (UPKE), enzyme-treated PKE (EPKE), and oligosaccharides extracted from PKE (OligoPKE), on the cecal microbiota of broiler chickens at 14 d old (day 14) and 28 d old (day 28) using 16S rRNA gene high-throughput next-generation sequencing method. The results showed that temporal changes in cecal microbiota of broiler chickens were evident on day 14 and day 28. The relative abundance of phylum Firmicutes, known to be involved in nutrient uptake and absorption in both age groups was higher in the UPKE as compared to EPKE group. In addition, supplementation of OligoPKE increased (P 0.05) the relative abundance of Lactobacillus on both D14 and D28, signifying its effect as prebiotics in enhancing growth of indigenous Lactobacillus. Our results showed that cecal microbiota was significantly modulated by dietary treatments and that the lower relative abundance of phylum Firmicutes in chickens fed with EPKE could be a reason why broiler chickens fed with EPKE of higher metabolizable energy (ME) content did not show improvement in their growth performance.
机译：Palm核驱虫机（PKE）作为肉鸡饮食中的替代能源的潜在使用受高纤维含量的限制。虽然酶处理可以缓解纤维组分并增加PKE的营养值，但这种表观改善不会反映在用处理的PKE喂养的鸟类的生长反应中。由于鸡肉的CECA是胃肠道内部含有微生物的群体，因此假设饮食治疗的任何调节肠环境应反映在CeCal Microflla的组合物和活性。盲肠微生物群组合物与宿主从饮食中提取能量之间的效率之间存在相关性，并将能量置于改善的进料转化率。目前，关于饲喂PKE饮食的肉鸡菌微群的变化很少。因此，本研究旨在评估喂养不同形式的PKE的影响;即来自PKE（Oligopke）中提取的酶处理的PKE（UPKE），酶处理的PKE（EPKE），在14d旧（第14天）和28 d旧（第28天）的肉鸡鸡的山粥微生物上提取的寡糖（Oligopke）。使用16s rRNA基因高通量下一代测序方法。结果表明，在第14天和第28天，肉鸡鸡的宫颈微生物群的时间变化是显而易见的。与EPKE相比，在邻近的植物中，已知参与营养摄取和吸收的营养素摄取和吸收的相对丰富团体。此外，补充寡孔的补充（P <0.05）D14和D28上的乳杆菌的相对丰度，在提高土着乳酸杆菌的增强生长方面表明其效果。我们的研究结果表明，肠道微生物会受到膳食治疗的显着调节，并且用EPKE喂养的鸡中的鸡的较低的相对丰度可能是为什么肉鸡鸡与较高代谢能量（ME）含量的EPKE喂养的原因没有表现出他们的改善成长性能。

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