Effects of concentrate levels on intestinal fermentation and the microbial profile in Japanese draft horses.

Q3 Veterinary Journal of Equine Science Pub Date : 2023-12-01 Epub Date: 2024-01-18 DOI:10.1294/jes.34.101
Rintaro Yano, Tomoe Moriyama, Miho Fujimori, Takehiro Nishida, Masaaki Hanada, Naoki Fukuma
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Abstract

In racehorses, feeding a high-concentrate diet could cause abnormal fermentation in the hindgut. This feeding management regime is not suitable for the nutritional physiology of horses. However, studies on the hindgut environment have yet to be reported in Japanese draft horses, so feeding management needs to be investigated in these horses. Therefore, the objective of this study was to investigate the effects of a high-concentrate diet on hindgut fermentation in Japanese draft horses. Feces were collected from 20 male Japanese draft horses managed by two stables with different feeding designs (65% weight ratio of concentrate feed, HC; 50% weight ratio of concentrate, MC), and fecal metabolic characteristics and the microbiome were analyzed. Higher lactate concentrations and lower fecal pH levels were observed in the HC group (P=0.0011, P=0.0192, respectively). Fecal microbiome analysis revealed a decrease in microbial diversity (P=0.0360) and an increase in the relative abundance of Streptococcus lutetiensis/equinus/infantarius (P=0.0011) in the HC group. On the other hand, fibrolytic bacteria in the MC group had similarities with Clostridium sacchalolyticum and Ruminococcus albus. This study revealed that overfeeding of concentrates induced abnormal fermentation in the hindgut of Japanese draft horses. This suggests that the establishment of a feeding design based on not only the chemical compositions of feeds but also microbial dynamics is needed.

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精料水平对日本草食马肠道发酵和微生物概况的影响。
对于赛马来说,饲喂高浓缩饲料可能会导致后肠异常发酵。这种饲养管理制度不适合马的营养生理。然而,有关日本草食马后肠道环境的研究尚未见报道,因此需要对这些马匹的饲养管理进行调查。因此,本研究的目的是调查高浓缩日粮对日本草马后肠发酵的影响。研究人员收集了由两个马场管理的 20 匹雄性日本草食马的粪便,采用了不同的饲喂设计(精饲料重量比为 65%,HC;精饲料重量比为 50%,MC),并对粪便代谢特征和微生物组进行了分析。在 HC 组观察到较高的乳酸盐浓度和较低的粪便 pH 值(分别为 P=0.0011 和 P=0.0192)。粪便微生物组分析显示,HC 组的微生物多样性降低(P=0.0360),卢泰金链球菌/quinus/infantarius 的相对丰度增加(P=0.0011)。另一方面,MC 组的纤维分解菌与囊溶梭菌和白反刍球菌相似。这项研究表明,过量饲喂精料会诱发日本草食马后肠道异常发酵。这表明,不仅需要根据饲料的化学成分,还需要根据微生物的动态变化来确定饲喂设计。
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来源期刊
Journal of Equine Science
Journal of Equine Science Veterinary-Equine
CiteScore
1.60
自引率
0.00%
发文量
9
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