G.
Piccione
(Corresponding author)
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Dipartimento di Scienze
Sperimentali e Biotecnologie Applicate - Facolt? di Medicina Veterinaria -
Universit? degli Studi di
Messina. 98168 Messina - Italy
e-mail : giuseppe.piccione@unime.it
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Publication
Data
Paper received:
24 April 2010
Revised received:
15 November 2010
Re-revised received:
15 November 2011
Accepted:
03
December 2011
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Abstract
The
aim of this study was to investigate the variations of rumen pH and fatty
acids (acetic acid, propionic acid, iso-butyric acid, n-butyric acid,
iso-valerianic acid, n-valerianic, caproic acid and total fatty acids) in 245
early lactating dairy cows under different temperature and humidity
conditions. The animals were divided into six groups and rumen fluid was
collected by rumenocentesis on 22 dairy cows in April (Group A), 33 in May
(Group B), 43 in June (Group C), 48 in July (Group D), 36 in September (Group
E) and 60 in October (Group F). One-way analysis of variance (ANOVA),
followed by the Bonferroni?s test, showed a significant effect of
environmental variations on all studied parameters (P<0.0001). Changes in
studied parameters can be explained in relation to the microbial population
and shift in the optima for rumen conditions associated with variations of
environmental conditions. We can affirm that the microbial assemblages that
underlie energy and protein supply to wild ruminant are evident especially in
relation to temperature and humidity conditions.
Key words
Dairy
cows, Early lactation, Fatty acids, Rumen pH , Rumen acidosis
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conclusions enforced or derived, rest completely with the author(s).
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