1.054
IF5
1.150
IF
Q3
JCR
1.7
CiteScore
0.396
SJR
Q2
SJR
40
MNiSW
148.75
ICV
ORIGINAL PAPER
 
CC-BY 4.0
 
 

Blood metabolites and haematological indices of pregnant beef cows fed rumen-protected methionine

B. Liker 1  ,  
M. Knežević 1,  
V. Rupić 1,  
N. Vranešić 2,  
Ž. Romić 3,  
D. Grbeša 1,  
D. Mačešić 1,  
J. Leto 1,  
Z. Antunović 3,  
 
1
Faculty of Agriculture, University of Zagreb, Svetošimunska 25, 10000 Zagreb, Croatia
2
PLIVA, Chemical and Pharmaceutical Works, Research Institute, Avenija Vukovar, 10000 Zagreb, Croatia
3
Dubrava Clinic Hospital, 10000 Zagreb, Croatia
J. Anim. Feed Sci. 2005;14(4):625–638
Publication date: 2005-10-17
KEYWORDS
ABSTRACT
The effect of rumen-protected DL-methionine on some blood biochemical and haematological values of cows in approximately the last 102 days of pregnancy was examined. Twenty-six cows in the third stage of gestation were divided into two groups of equal number, a control (C) and an experimental group (E). Cows were fed meadow hay, maize grain silage and a 500 g fodder mixture (35% CP). In addition to the fodder mixture, cows in group E received 15 g rumen-protected DL-methionine per animal daily (Mepron® M85). Blood samples were collected on approximately days 102, 68, 34 and 1 prior to parturition. Plasma glucose concentrations of cows in group E were significantly decreased over a long part of the trial period (68 and 34 days prior to parturition) (P=0.046 and P=0.0175, respectively). Plasma urea concentration in group C was decreased close to statistical significance (P=0.053) on the 68th day prior to parturition. No significant differences were found in plasma concentrations of total protein, albumin, triacylglycerols, total cholesterol and creatinine between the two groups during the trial. The activity of alanine aminotransferase in animals of group E was lower, close to statistical significance (P=0.052) 34 days prior to parturition. No significant differences were found in plasma of asparate aminotransferase, gamma-glutamyltransferase and alkaline phosphatase levels between groups during experimental feeding. Cows in group E had a lower red blood cell count on the 68th and 34th days prior to parturition (P=0.316 and P=0.153, respectively). On the 68th day before calving the lower number of leukocytes was close to statistical significance (P=0.0785), with highly significant neutropenia in absolute (P<0.001) and relative (P=0.039) terms, and a decreased neutrophyles/lymphocytes ratio (P<0.001). The results indicate that rumen-protected methionine could have an anti-stress effect on cows during late gestation in winter stable feeding and holding conditions.
CORRESPONDING AUTHOR
B. Liker   
Faculty of Agriculture, University of Zagreb, Svetošimunska 25, 10000 Zagreb, Croatia
 
CITATIONS (2):
1. Beneficial effects of rumen-protected methionine on nitrogen-use efficiency, histological parameters, productivity and reproductive performance of ruminants
Mohamed Ayyat, Adham Al-Sagheer, Ahmed Noreldin, El-Hack Abd, Asmaa Khafaga, Mervat Abdel-Latif, Ayman Swelum, Muhammad Arif, Abdelfattah Salem
Animal Biotechnology
2. The Bovine Metabolome
Aidin Foroutan, Carolyn Fitzsimmons, Rupasri Mandal, Hamed Piri-Moghadam, Jiamin Zheng, AnChi Guo, Carin Li, Le Guan, David Wishart
Metabolites
ISSN:1230-1388