Effects of correcting in situ ruminal microbial colonization of feed particles on the relationship between ruminally undegraded and intestinally digested crude protein in concentrate feeds

Gonzalez Cano, Javier and Mouhbi, Rabiaa and Guevara González, Jesús Alberto and Arroyo Martínez, José María (2018). Effects of correcting in situ ruminal microbial colonization of feed particles on the relationship between ruminally undegraded and intestinally digested crude protein in concentrate feeds. "Journal of the Science of Food and Agriculture", v. 98 (n. 3); pp. 891-895. ISSN 0022-5142. https://doi.org/10.1002/jsfa.8534.

Description

Title: Effects of correcting in situ ruminal microbial colonization of feed particles on the relationship between ruminally undegraded and intestinally digested crude protein in concentrate feeds
Author/s:
  • Gonzalez Cano, Javier
  • Mouhbi, Rabiaa
  • Guevara González, Jesús Alberto
  • Arroyo Martínez, José María
Item Type: Article
Título de Revista/Publicación: Journal of the Science of Food and Agriculture
Date: February 2018
ISSN: 0022-5142
Volume: 98
Subjects:
Freetext Keywords: protein; ruminal degradability; intestinal digestibility; microbial contamination; sheep
Faculty: E.T.S. de Ingeniería Agronómica, Alimentaria y de Biosistemas (UPM)
Department: Producción Agraria
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

BACKGROUND: In situ estimates of ruminally undegraded protein (RUP) and intestinally digested protein (IDP) of ten concentrates, uncorrected or corrected for the ruminal microbial colonization, were used to examine the effects of this correction on the relationship between IDP and RUP values. Both variables were established for three rumen and duodenum cannulated wethers using 15N labeling-techniques and considering measured rates of ruminal particle comminution (kc) and outflow (kp). RESULTS: A covariance analysis showed that the close relationship found between both variables (IDP = -0.0132 (± 0.00679) + 0.776 (± 0.0002) RUP; n = 60; P < 0.001; R2 = 0.960) is not affected by correcting for microbial colonization (P = 0.682). CONCLUSION: The IDP content in concentrates and industrial by-products can be predicted from RUP values, thus avoiding the laborious and complex procedure of determining intestinal digestibility; however a larger sample of feeds is necessary to attain more accurate predictions. The lack of influence of the correction for microbial contamination on the prediction observed in our study increases the data available for this prediction. However, only using corrected values may provide an accurate evaluation.

Funding Projects

TypeCodeAcronymLeaderTitle
Government of SpainAGL 2006-08300UnspecifiedUnspecifiedUnspecified

More information

Item ID: 54796
DC Identifier: http://oa.upm.es/54796/
OAI Identifier: oai:oa.upm.es:54796
DOI: 10.1002/jsfa.8534
Official URL: https://onlinelibrary.wiley.com/doi/abs/10.1002/jsfa.8534
Deposited by: Memoria Investigacion
Deposited on: 19 Jun 2019 11:37
Last Modified: 19 Jun 2019 11:37
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