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Home / Equine Research Bank / Animals (Basel) / Fecal Microbiota, Forage Nutrients, and Metabolic Responses ...
Animals : an open access journal from MDPI2023; 13(5); 790; doi: 10.3390/ani13050790

Fecal Microbiota, Forage Nutrients, and Metabolic Responses of Horses Grazing Warm- and Cool-Season Grass Pastures.

Abstract: Integrating warm-season grasses into cool-season equine grazing systems can increase pasture availability during summer months. The objective of this study was to evaluate effects of this management strategy on the fecal microbiome and relationships between fecal microbiota, forage nutrients, and metabolic responses of grazing horses. Fecal samples were collected from 8 mares after grazing cool-season pasture in spring, warm-season pasture in summer, and cool-season pasture in fall as well as after adaptation to standardized hay diets prior to spring grazing and at the end of the grazing season. Random forest classification was able to predict forage type based on microbial composition (accuracy: 0.90 ± 0.09); regression predicted forage crude protein (CP) and non-structural carbohydrate (NSC) concentrations ( < 0.0001). and were enriched in horses grazing warm-season pasture and were positively correlated with CP and negatively with NSC; was negatively correlated with peak plasma glucose concentrations following oral sugar tests ( ≤ 0.05). These results indicate that distinct shifts in the equine fecal microbiota occur in response different forages. Based on relationships identified between the microbiota, forage nutrients, and metabolic responses, further research should focus on the roles of spp. and within the equine hindgut.
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Publication Date: 2023-02-22 PubMed ID: 36899650PubMed Central: PMC10000167DOI: 10.3390/ani13050790Google Scholar: Lookup
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  • Journal Article

Summary

This research summary has been generated with artificial intelligence and may contain errors and omissions. Refer to the original study to confirm details provided. Submit correction.

This research article explores how integrating warm-season grasses into cool-season equine grazing systems can influence the fecal microbiome, forage nutrients, and metabolic responses of grazing horses.

Objective and Methodology

  • The primary objective of the study was to assess the impact of changing equine grazing systems (integrating warm-season grasses into a cool-season system) on a horse’s fecal microbiome, forage nutrients and metabolic responses.
  • To accomplish this, the researchers collected fecal samples from eight mares after grazing on cool-season pasture in spring, warm-season pasture in summer, and again on a cool-season pasture in fall. They also collected samples after the mares adapted to standardised hay diets prior to spring grazing and at the end of the grazing season.

Results and Findings

  • The researchers employed a random forest classification to predict forage type based on microbial composition, yielding an accuracy of approximately 90%.
  • The regression predicted forage crude protein (CP) and non-structural carbohydrate (NSC) concentrations.
  • Two microbial genera, and , were found to be enriched in horses grazing warm-season pasture. These microbes were positively correlated with CP and negatively correlated with NSC.
  • A third microbial genus, , was found to be negatively correlated with peak plasma glucose concentrations following oral sugar tests.

Implications and Future Research

  • The study demonstrated that distinct shifts in the equine fecal microbiota occur in response to different forages used in the equine grazing system.
  • Notably, it was found that the presence and concentration of certain microbial genera in the feces can indicate a change in forage type and can also predict the concentration of certain nutrients in the forage.
  • Based on these findings, the authors suggest that future research should focus on the roles of certain identified microbial genera within the equine hindgut to better understand the complex interplay between diet, digestive system and overall health and nutrition of the horses.

Cite This Article

APA
Weinert-Nelson JR, Biddle AS, Sampath H, Williams CA. (2023). Fecal Microbiota, Forage Nutrients, and Metabolic Responses of Horses Grazing Warm- and Cool-Season Grass Pastures. Animals (Basel), 13(5), 790. https://doi.org/10.3390/ani13050790

Publication

Animals : an open access journal from MDPI
ISSN: 2076-2615
NlmUniqueID: 101635614
Country: Switzerland
Language: English
Volume: 13
Issue: 5
PII: 790

Researcher Affiliations

Weinert-Nelson, Jennifer R
  • Department of Animal Sciences, Rutgers, The State University of New Jersey, New Brunswick, NJ 08901, USA.
Biddle, Amy S
  • Department of Animal and Food Sciences, University of Delaware, Newark, DE 19711, USA.
Sampath, Harini
  • Department of Nutritional Sciences, Rutgers, The State University of New Jersey, New Brunswick, NJ 08901, USA.
  • Rutgers Center for Lipid Research, New Jersey Institute for Food, Nutrition, and Health, Rutgers, The State University of New Jersey, New Brunswick, NJ 08901, USA.
Williams, Carey A
  • Department of Animal Sciences, Rutgers, The State University of New Jersey, New Brunswick, NJ 08901, USA.

Grant Funding

  • Hatch project 1003557 / United States Department of Agriculture
  • gne17-162 / USDA Northeast Sustainable Agriculture, Research, and Education
  • Hatch project NJ06260 / New Jersey Agricultural Experiment Station
  • NA / Rutgers University Equine Science Center

Conflict of Interest Statement

The authors declare no conflict of interest.

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Citations

This article has been cited 1 times.
  1. Zaitseva S, Dagurova O, Radnagurueva A, Kozlova A, Izotova A, Krylova A, Noskov S, Begmatov S, Patutina E, Barkhutova DD. Fecal Microbiota and Diet Composition of Buryatian Horses Grazing Warm- and Cold-Season Grass Pastures.. Microorganisms 2023 Jul 30;11(8).
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