Effects of pressure toasting on in situ degradability and intestinal protein and protein-free organic matter digestibility of rapeseed

A. Azarfar, C. Ferreira, J.O. Goelema, A.F.B. van der Poel

Research output: Contribution to journalArticleAcademicpeer-review

5 Citations (Scopus)

Abstract

BACKGROUND: Rapeseed is a protein supplement that contains up to 40% crude protein (CP) on a dry matter (DM) basis, but a large part of its protein can be easily degraded in the rumen. Therefore, before inclusion in ruminant's diet, the extent of its protein degradation in the rumen must be reduced without altering its intestinal digestibility. A study was conducted to investigate the effects of pressure toasting (T, 130 °C) at two residence times (1.5 and 10min) alone or in combination with soaking in water (ST, 4h) on ruminal degradability and intestinal digestibility of CP and protein-free organic matter (PFOM) in whole full-fat rapeseed. RESULTS: Regardless of the processing time (1.5 or lOmin), T significantly (P <0.05) increased the fraction of undegraded intake protein (UIP) compared to the untreated rapeseed samples. Soaking prior to further toasting did not improve the rumen degradation characteristics of rapeseed CP. Compared to the untreated rapeseed samples, both T and ST significantly (P <0.0001) improved the true protein digested in the small intestine (DVE) and degraded protein balance (OEB), effects that were more evident in samples heated for 10min. Soaking prior to pressure toasting, however, did not further improve the DVE or OEB in the rapeseed samples in comparison with T treatment. CONCLUSIONS: It was concluded that ruminal protein degradability of rapeseed decreased after pressure toasting, without seriously affecting its intestinal digestibility.
Original languageEnglish
Pages (from-to)1380-1384
JournalJournal of the Science of Food and Agriculture
Volume88
Issue number8
DOIs
Publication statusPublished - 2008

Fingerprint

toasting
Brassica rapa
rapeseed
digestibility
organic matter
Pressure
soaking
rumen
Proteins
proteins
crude protein
Rumen
rapeseed protein
sampling
true protein
protein supplements
protein degradation
protein intake
small intestine
ruminants

Keywords

  • heat-treatment
  • canola-meal
  • rumen
  • degradation
  • system
  • whole

Cite this

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title = "Effects of pressure toasting on in situ degradability and intestinal protein and protein-free organic matter digestibility of rapeseed",
abstract = "BACKGROUND: Rapeseed is a protein supplement that contains up to 40{\%} crude protein (CP) on a dry matter (DM) basis, but a large part of its protein can be easily degraded in the rumen. Therefore, before inclusion in ruminant's diet, the extent of its protein degradation in the rumen must be reduced without altering its intestinal digestibility. A study was conducted to investigate the effects of pressure toasting (T, 130 °C) at two residence times (1.5 and 10min) alone or in combination with soaking in water (ST, 4h) on ruminal degradability and intestinal digestibility of CP and protein-free organic matter (PFOM) in whole full-fat rapeseed. RESULTS: Regardless of the processing time (1.5 or lOmin), T significantly (P <0.05) increased the fraction of undegraded intake protein (UIP) compared to the untreated rapeseed samples. Soaking prior to further toasting did not improve the rumen degradation characteristics of rapeseed CP. Compared to the untreated rapeseed samples, both T and ST significantly (P <0.0001) improved the true protein digested in the small intestine (DVE) and degraded protein balance (OEB), effects that were more evident in samples heated for 10min. Soaking prior to pressure toasting, however, did not further improve the DVE or OEB in the rapeseed samples in comparison with T treatment. CONCLUSIONS: It was concluded that ruminal protein degradability of rapeseed decreased after pressure toasting, without seriously affecting its intestinal digestibility.",
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author = "A. Azarfar and C. Ferreira and J.O. Goelema and {van der Poel}, A.F.B.",
year = "2008",
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language = "English",
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pages = "1380--1384",
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}

Effects of pressure toasting on in situ degradability and intestinal protein and protein-free organic matter digestibility of rapeseed. / Azarfar, A.; Ferreira, C.; Goelema, J.O.; van der Poel, A.F.B.

In: Journal of the Science of Food and Agriculture, Vol. 88, No. 8, 2008, p. 1380-1384.

Research output: Contribution to journalArticleAcademicpeer-review

TY - JOUR

T1 - Effects of pressure toasting on in situ degradability and intestinal protein and protein-free organic matter digestibility of rapeseed

AU - Azarfar, A.

AU - Ferreira, C.

AU - Goelema, J.O.

AU - van der Poel, A.F.B.

PY - 2008

Y1 - 2008

N2 - BACKGROUND: Rapeseed is a protein supplement that contains up to 40% crude protein (CP) on a dry matter (DM) basis, but a large part of its protein can be easily degraded in the rumen. Therefore, before inclusion in ruminant's diet, the extent of its protein degradation in the rumen must be reduced without altering its intestinal digestibility. A study was conducted to investigate the effects of pressure toasting (T, 130 °C) at two residence times (1.5 and 10min) alone or in combination with soaking in water (ST, 4h) on ruminal degradability and intestinal digestibility of CP and protein-free organic matter (PFOM) in whole full-fat rapeseed. RESULTS: Regardless of the processing time (1.5 or lOmin), T significantly (P <0.05) increased the fraction of undegraded intake protein (UIP) compared to the untreated rapeseed samples. Soaking prior to further toasting did not improve the rumen degradation characteristics of rapeseed CP. Compared to the untreated rapeseed samples, both T and ST significantly (P <0.0001) improved the true protein digested in the small intestine (DVE) and degraded protein balance (OEB), effects that were more evident in samples heated for 10min. Soaking prior to pressure toasting, however, did not further improve the DVE or OEB in the rapeseed samples in comparison with T treatment. CONCLUSIONS: It was concluded that ruminal protein degradability of rapeseed decreased after pressure toasting, without seriously affecting its intestinal digestibility.

AB - BACKGROUND: Rapeseed is a protein supplement that contains up to 40% crude protein (CP) on a dry matter (DM) basis, but a large part of its protein can be easily degraded in the rumen. Therefore, before inclusion in ruminant's diet, the extent of its protein degradation in the rumen must be reduced without altering its intestinal digestibility. A study was conducted to investigate the effects of pressure toasting (T, 130 °C) at two residence times (1.5 and 10min) alone or in combination with soaking in water (ST, 4h) on ruminal degradability and intestinal digestibility of CP and protein-free organic matter (PFOM) in whole full-fat rapeseed. RESULTS: Regardless of the processing time (1.5 or lOmin), T significantly (P <0.05) increased the fraction of undegraded intake protein (UIP) compared to the untreated rapeseed samples. Soaking prior to further toasting did not improve the rumen degradation characteristics of rapeseed CP. Compared to the untreated rapeseed samples, both T and ST significantly (P <0.0001) improved the true protein digested in the small intestine (DVE) and degraded protein balance (OEB), effects that were more evident in samples heated for 10min. Soaking prior to pressure toasting, however, did not further improve the DVE or OEB in the rapeseed samples in comparison with T treatment. CONCLUSIONS: It was concluded that ruminal protein degradability of rapeseed decreased after pressure toasting, without seriously affecting its intestinal digestibility.

KW - heat-treatment

KW - canola-meal

KW - rumen

KW - degradation

KW - system

KW - whole

U2 - 10.1002/jsfa.3228

DO - 10.1002/jsfa.3228

M3 - Article

VL - 88

SP - 1380

EP - 1384

JO - Journal of the Science of Food and Agriculture

JF - Journal of the Science of Food and Agriculture

SN - 0022-5142

IS - 8

ER -