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Journal of Environmental Biology

pISSN: 0254-8704 ; eISSN: 2394-0379 ; CODEN: JEBIDP

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    Abstract - Issue Nov 2012, 33 (6)                                     Back


nstantaneous and historical temperature effects on a-pinene

Influence of temperature and humidity on rumen pH

and fatty acids in dairy cows

 

Author Details

 

M. Gianesella ??????????

Dipartimento di Scienze Cliniche Veterinarie - Facolt? di Medicina Veterinaria - Universit? degli Studi ?

di Padova. 35020 Legnaro (PD) - Italy

G. Piccione

(Corresponding author)

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

C. Cannizzo?

Dipartimento di Scienze Cliniche Veterinarie - Facolt? di Medicina Veterinaria - Universit? degli Studi ?

di Padova. 35020 Legnaro (PD) - Italy

S. Casella????

Dipartimento di Scienze Sperimentali e Biotecnologie Applicate - Facolt? di Medicina Veterinaria ?

Universit? degli Studi di Messina. 98168 Messina - Italy

M. Morgante

Dipartimento di Scienze Cliniche Veterinarie - Facolt? di Medicina Veterinaria - Universit? degli Studi

di Padova. 35020 Legnaro (PD) - Italy

 

Publication Data

Paper received:

24 April 2010

 

Revised received:

15 November 2010

 

Re-revised received:

15 November 2011

 

Accepted:

03 December 2011

 

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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