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Home / Equine Research Bank / J Anim Physiol Anim Nutr (Berl) / The effect of crude protein content of the diet on renal ene...
Journal of animal physiology and animal nutrition2020; 104(5); 1494-1500; doi: 10.1111/jpn.13377

The effect of crude protein content of the diet on renal energy losses in horses.

Abstract: Renal energy losses of horses are high in comparison with other species. In the present study, more data were obtained on this parameter to improve predictive equations for renal energy losses. Four adult ponies (247-344 kg body weight [BW]) were fed with eight different diets based on first cut hay, second cut hay, early first cut fresh grass, late cut herbs-grass mix, early cut clover-grass mix, sugar beet pulp, rice bran and straw. Feed intake was measured, and urine and faeces were quantitatively collected for 3 × 12 hr at daytime and afterwards 3 × 12 hr at nighttime. Feed was analysed for crude nutrients, gross energy, amino acids and neutral-detergent-insoluble crude protein (NDICP); faeces were analysed for crude nutrients and gross energy; and urine was analysed for nitrogen (N) and gross energy. Renal energy losses per gram dry matter (DM) intake (y; kJ/g DM) were strictly correlated to protein content in DM (x; g/kg DM): y = 0.325 + 0.00431x; r  = .81; n = 38; p < .001. The data suggest that the intercept represents energy losses by detoxification products such as hippuric acid and the regression coefficient by protein metabolites such as urea.
© 2020 The Authors. Journal of Animal Physiology and Animal Nutrition published by Blackwell Verlag GmbH.
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Publication Date: 2020-05-14 PubMed ID: 32406982DOI: 10.1111/jpn.13377Google Scholar: Lookup
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  • Clinical Trial
  • Veterinary
  • 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.

The research examined how the crude protein content in a horse’s diet influences the energy loss in their kidneys. It was found that a direct correlation exists, suggesting that energy losses may be due to the metabolic byproducts of protein.

Objective of the Research

  • The goal of this study was to secure a more detailed understanding of the high renal energy losses found in horses compared to other species. The researchers hoped to use the information acquired to improve predictive equations for renal energy losses.

Methodology

  • Four adult ponies, with varying body weights ranging from 247-344 kg, were fed eight different diet types which included various types of hay, grass, sugar beet pulp, rice bran and straw.
  • Feed intake, urine, and faeces were carefully collected and measured over specified periods of time, both during the day and night.
  • The feed was then analyzed for crude nutrients, gross energy, amino acids and neutral-detergent-insoluble crude protein (NDICP) while the faeces were tested for crude nutrients and gross energy. The urine was analyzed for nitrogen and gross energy.

Findings

  • A strict correlation was found between renal energy loss per gram of dry matter intake and protein content in dry matter with a high correlation coefficient of 0.81. This was found to be statistically significant with p < .001.
  • The intercept of the regression equation appeared to represent energy losses due to detoxification products such as hippuric acid, whilst the coefficient of the equation represented energy lost through protein metabolites like urea.

Implications

  • The results of this study suggest that renal energy loss in horses is directly related to the protein content in their diet.
  • This research can also give insights into how different types of diets can impact the energy loss of horses, hence helping in devising a better diet plan for horses to maintain their energy levels.

Cite This Article

APA
Kuchler M, Zeyner A, Susenbeth A, Kienzle E. (2020). The effect of crude protein content of the diet on renal energy losses in horses. J Anim Physiol Anim Nutr (Berl), 104(5), 1494-1500. https://doi.org/10.1111/jpn.13377

Publication

Journal of animal physiology and animal nutrition
ISSN: 1439-0396
NlmUniqueID: 101126979
Country: Germany
Language: English
Volume: 104
Issue: 5
Pages: 1494-1500

Researcher Affiliations

Kuchler, Marleen
  • Chair of Animal Nutrition and Dietetics, Department of Veterinary Science, Ludwig-Maximilians-University, Munich, Germany.
Zeyner, Annette
  • Institute of Agricultural and Nutritional Sciences, Animal Nutrition Group, Martin Luther University Halle-Wittenberg, Halle (Saale), Germany.
Susenbeth, Andreas
  • Institute of Animal Nutrition and Physiology, Christian-Albrechts-University, Kiel, Germany.
Kienzle, Ellen
  • Chair of Animal Nutrition and Dietetics, Department of Veterinary Science, Ludwig-Maximilians-University, Munich, Germany.

MeSH Terms

  • Animal Feed / analysis
  • Animals
  • Diet / veterinary
  • Dietary Proteins / administration & dosage
  • Dietary Proteins / pharmacology
  • Digestion
  • Dose-Response Relationship, Drug
  • Energy Metabolism
  • Female
  • Horses / physiology
  • Kidney / metabolism
  • Male

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This article includes 20 references
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Citations

This article has been cited 3 times.
  1. Pisch C, Wensch-Dorendorf M, Schwarzenbolz U, Henle T, Greef JM, Zeyner A. Effect of Hay Steaming on the Estimated Precaecal Digestibility of Crude Protein and Selected Amino Acids in Horses.. Animals (Basel) 2022 Nov 10;12(22).
    doi: 10.3390/ani12223092pubmed: 36428320google scholar: lookup
  2. Saastamoinen M, Särkijärvi S, Suomala H. Protein Source and Intake Effects on Diet Digestibility and N Excretion in Horses-A Risk of Environmental N Load of Horses.. Animals (Basel) 2021 Dec 15;11(12).
    doi: 10.3390/ani11123568pubmed: 34944342google scholar: lookup
  3. Glatter M, Bochnia M, Wensch-Dorendorf M, Greef JM, Zeyner A. Feed Intake Parameters of Horses Fed Soaked or Steamed Hay and Hygienic Quality of Hay Stored following Treatment.. Animals (Basel) 2021 Sep 18;11(9).
    doi: 10.3390/ani11092729pubmed: 34573695google scholar: lookup
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