Combined effects of aspergillus oryzae fermentation extract and monensin on fermentation in the rumen simulation technique (rusitec)

C.J. Newbold, N. McKain, R.J. Wallace

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Monensin, an ionophore, and Aspergillus oryzae fermentation extract (AO), a fungal feed additive, are growth promoters which modify rumen fermentation. The effects of combining these additives were determined in the rumen simulation technique (Rusitec). Sixteen vessels received 20 g/day of a diet of hay, barley, molasses, fishmeal and a mineral/vitamin mixture (500, 299·5, 100, 91 and 9·5 g/kg DM respectively). AO, monensin (M) and AO + monensin (AO/M) were each added to four vessels at 500, 10 and (500 + 10) mg/day respectively. Both M and AO/M increased propionate (14·5 and 138 v. 91 mmol/day in controls; P < 0·001) and reduced butyrate production (6·6, 5·2 and 9·1 mmol/day respectively; P < 0·01), whereas AO had no effect. AO increased bacterial numbers by 70% (P < 0·055), while M had no effect, and in the presence of M, AO also had no effect. Proteolytic activity in samples from the vessels decreased (P < 0·05) in all treatments (1·06, 0·71, 0·60 and 0·47 mg 14C-casein/mg protein/h for control, AO, M and AO/M respectively). In contrast, deamination of amino acids increased (P < 0·001) with AO and AO/M but decreased slightly with M alone (482, 646, 434 and 644 nmol NH3/mg protein/h). Ammonia output was unchanged (47·4, 57·2, 42·7 and 44·8 mg/day). Thus each additive was dominant over the other for different activities, with monensin generally suppressing the effects of AO rather than vice-versa.
Original languageEnglish
Pages (from-to)241-246
Number of pages6
JournalJournal of Agricultural Science
Volume121
Issue number2
DOIs
Publication statusPrint publication - 1993
Externally publishedYes

Fingerprint

Aspergillus oryzae
Monensin
monensin
Rumen
rumen fermentation
Fermentation
fermentation
extracts
methodology
ammonia
Molasses
deamination
Deamination
Butyrates
Ionophores
feed additives
Propionates
ionophores
molasses
Hordeum

Bibliographical note

Cited By :5

Export Date: 18 May 2019

Cite this

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title = "Combined effects of aspergillus oryzae fermentation extract and monensin on fermentation in the rumen simulation technique (rusitec)",
abstract = "Monensin, an ionophore, and Aspergillus oryzae fermentation extract (AO), a fungal feed additive, are growth promoters which modify rumen fermentation. The effects of combining these additives were determined in the rumen simulation technique (Rusitec). Sixteen vessels received 20 g/day of a diet of hay, barley, molasses, fishmeal and a mineral/vitamin mixture (500, 299·5, 100, 91 and 9·5 g/kg DM respectively). AO, monensin (M) and AO + monensin (AO/M) were each added to four vessels at 500, 10 and (500 + 10) mg/day respectively. Both M and AO/M increased propionate (14·5 and 138 v. 91 mmol/day in controls; P < 0·001) and reduced butyrate production (6·6, 5·2 and 9·1 mmol/day respectively; P < 0·01), whereas AO had no effect. AO increased bacterial numbers by 70{\%} (P < 0·055), while M had no effect, and in the presence of M, AO also had no effect. Proteolytic activity in samples from the vessels decreased (P < 0·05) in all treatments (1·06, 0·71, 0·60 and 0·47 mg 14C-casein/mg protein/h for control, AO, M and AO/M respectively). In contrast, deamination of amino acids increased (P < 0·001) with AO and AO/M but decreased slightly with M alone (482, 646, 434 and 644 nmol NH3/mg protein/h). Ammonia output was unchanged (47·4, 57·2, 42·7 and 44·8 mg/day). Thus each additive was dominant over the other for different activities, with monensin generally suppressing the effects of AO rather than vice-versa.",
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Combined effects of aspergillus oryzae fermentation extract and monensin on fermentation in the rumen simulation technique (rusitec). / Newbold, C.J.; McKain, N.; Wallace, R.J.

In: Journal of Agricultural Science, Vol. 121, No. 2, 1993, p. 241-246.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Combined effects of aspergillus oryzae fermentation extract and monensin on fermentation in the rumen simulation technique (rusitec)

AU - Newbold, C.J.

AU - McKain, N.

AU - Wallace, R.J.

N1 - Cited By :5 Export Date: 18 May 2019

PY - 1993

Y1 - 1993

N2 - Monensin, an ionophore, and Aspergillus oryzae fermentation extract (AO), a fungal feed additive, are growth promoters which modify rumen fermentation. The effects of combining these additives were determined in the rumen simulation technique (Rusitec). Sixteen vessels received 20 g/day of a diet of hay, barley, molasses, fishmeal and a mineral/vitamin mixture (500, 299·5, 100, 91 and 9·5 g/kg DM respectively). AO, monensin (M) and AO + monensin (AO/M) were each added to four vessels at 500, 10 and (500 + 10) mg/day respectively. Both M and AO/M increased propionate (14·5 and 138 v. 91 mmol/day in controls; P < 0·001) and reduced butyrate production (6·6, 5·2 and 9·1 mmol/day respectively; P < 0·01), whereas AO had no effect. AO increased bacterial numbers by 70% (P < 0·055), while M had no effect, and in the presence of M, AO also had no effect. Proteolytic activity in samples from the vessels decreased (P < 0·05) in all treatments (1·06, 0·71, 0·60 and 0·47 mg 14C-casein/mg protein/h for control, AO, M and AO/M respectively). In contrast, deamination of amino acids increased (P < 0·001) with AO and AO/M but decreased slightly with M alone (482, 646, 434 and 644 nmol NH3/mg protein/h). Ammonia output was unchanged (47·4, 57·2, 42·7 and 44·8 mg/day). Thus each additive was dominant over the other for different activities, with monensin generally suppressing the effects of AO rather than vice-versa.

AB - Monensin, an ionophore, and Aspergillus oryzae fermentation extract (AO), a fungal feed additive, are growth promoters which modify rumen fermentation. The effects of combining these additives were determined in the rumen simulation technique (Rusitec). Sixteen vessels received 20 g/day of a diet of hay, barley, molasses, fishmeal and a mineral/vitamin mixture (500, 299·5, 100, 91 and 9·5 g/kg DM respectively). AO, monensin (M) and AO + monensin (AO/M) were each added to four vessels at 500, 10 and (500 + 10) mg/day respectively. Both M and AO/M increased propionate (14·5 and 138 v. 91 mmol/day in controls; P < 0·001) and reduced butyrate production (6·6, 5·2 and 9·1 mmol/day respectively; P < 0·01), whereas AO had no effect. AO increased bacterial numbers by 70% (P < 0·055), while M had no effect, and in the presence of M, AO also had no effect. Proteolytic activity in samples from the vessels decreased (P < 0·05) in all treatments (1·06, 0·71, 0·60 and 0·47 mg 14C-casein/mg protein/h for control, AO, M and AO/M respectively). In contrast, deamination of amino acids increased (P < 0·001) with AO and AO/M but decreased slightly with M alone (482, 646, 434 and 644 nmol NH3/mg protein/h). Ammonia output was unchanged (47·4, 57·2, 42·7 and 44·8 mg/day). Thus each additive was dominant over the other for different activities, with monensin generally suppressing the effects of AO rather than vice-versa.

U2 - 10.1017/S002185960007711X

DO - 10.1017/S002185960007711X

M3 - Article

VL - 121

SP - 241

EP - 246

JO - Journal of Agricultural Science

JF - Journal of Agricultural Science

SN - 0021-8596

IS - 2

ER -