Effect of heat treatment and subsequent urea supplementation of sunflower meal on the in vitro ruminal degradability of crude protein content and its postruminal digestibility.

T. Veresegyházy, F. Kutas, S. Fekete, J. Csapó

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2 Citations (Scopus)

Abstract

A three-phase laboratory procedure was used for predicting the degradability of the protein of extracted sunflower meal before (SFM) and after heat treatment (HSFM). The rumen fluid degraded 69.1% and 67.1% of the SFM and HSFM protein, respectively. The digestibility values of rumen undegraded protein (UDP) were 57.3% (SFM) and 57.0% (HSFM) with pepsin and 17.6% (SFM) and 15.9% (HSFM) with pancreatin. Urea supplementation practically did not alter the rumen degradability of HSFM protein, while the pepsin digestibility of UDP decreased to 47.2%. Four fractions (NH3, dissolved amino acids, oligopeptides and proteins) of rumen degradable crude protein (RDP) were also determined in vitro: 81 to 92% of the degraded crude protein was found in the fractions tested. Heat treatment reduced free NH3 content but did not alter the other three fractions. Urea supplementation decreased the quantity of NH3, peptides and proteins as well.

Original languageEnglish
Pages (from-to)255-264
Number of pages10
JournalActa Veterinaria Hungarica
Volume37
Issue number3
Publication statusPublished - 1989

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sunflower meal
Helianthus
Meals
Urea
crude protein
urea
Hot Temperature
digestibility
protein content
heat treatment
Rumen
rumen
Proteins
proteins
pepsin
Pepsin A
oligopeptides
pancreatin
rumen fluids
digestible protein

ASJC Scopus subject areas

  • veterinary(all)

Cite this

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title = "Effect of heat treatment and subsequent urea supplementation of sunflower meal on the in vitro ruminal degradability of crude protein content and its postruminal digestibility.",
abstract = "A three-phase laboratory procedure was used for predicting the degradability of the protein of extracted sunflower meal before (SFM) and after heat treatment (HSFM). The rumen fluid degraded 69.1{\%} and 67.1{\%} of the SFM and HSFM protein, respectively. The digestibility values of rumen undegraded protein (UDP) were 57.3{\%} (SFM) and 57.0{\%} (HSFM) with pepsin and 17.6{\%} (SFM) and 15.9{\%} (HSFM) with pancreatin. Urea supplementation practically did not alter the rumen degradability of HSFM protein, while the pepsin digestibility of UDP decreased to 47.2{\%}. Four fractions (NH3, dissolved amino acids, oligopeptides and proteins) of rumen degradable crude protein (RDP) were also determined in vitro: 81 to 92{\%} of the degraded crude protein was found in the fractions tested. Heat treatment reduced free NH3 content but did not alter the other three fractions. Urea supplementation decreased the quantity of NH3, peptides and proteins as well.",
author = "T. Veresegyh{\'a}zy and F. Kutas and S. Fekete and J. Csap{\'o}",
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TY - JOUR

T1 - Effect of heat treatment and subsequent urea supplementation of sunflower meal on the in vitro ruminal degradability of crude protein content and its postruminal digestibility.

AU - Veresegyházy, T.

AU - Kutas, F.

AU - Fekete, S.

AU - Csapó, J.

PY - 1989

Y1 - 1989

N2 - A three-phase laboratory procedure was used for predicting the degradability of the protein of extracted sunflower meal before (SFM) and after heat treatment (HSFM). The rumen fluid degraded 69.1% and 67.1% of the SFM and HSFM protein, respectively. The digestibility values of rumen undegraded protein (UDP) were 57.3% (SFM) and 57.0% (HSFM) with pepsin and 17.6% (SFM) and 15.9% (HSFM) with pancreatin. Urea supplementation practically did not alter the rumen degradability of HSFM protein, while the pepsin digestibility of UDP decreased to 47.2%. Four fractions (NH3, dissolved amino acids, oligopeptides and proteins) of rumen degradable crude protein (RDP) were also determined in vitro: 81 to 92% of the degraded crude protein was found in the fractions tested. Heat treatment reduced free NH3 content but did not alter the other three fractions. Urea supplementation decreased the quantity of NH3, peptides and proteins as well.

AB - A three-phase laboratory procedure was used for predicting the degradability of the protein of extracted sunflower meal before (SFM) and after heat treatment (HSFM). The rumen fluid degraded 69.1% and 67.1% of the SFM and HSFM protein, respectively. The digestibility values of rumen undegraded protein (UDP) were 57.3% (SFM) and 57.0% (HSFM) with pepsin and 17.6% (SFM) and 15.9% (HSFM) with pancreatin. Urea supplementation practically did not alter the rumen degradability of HSFM protein, while the pepsin digestibility of UDP decreased to 47.2%. Four fractions (NH3, dissolved amino acids, oligopeptides and proteins) of rumen degradable crude protein (RDP) were also determined in vitro: 81 to 92% of the degraded crude protein was found in the fractions tested. Heat treatment reduced free NH3 content but did not alter the other three fractions. Urea supplementation decreased the quantity of NH3, peptides and proteins as well.

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VL - 37

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JO - Acta Veterinaria Hungarica

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