ORIGINAL PAPER
Analysis of the calving pattern of herds in small-scale dairy systems in central Mexico
D. Val-Arreola 1,   E. Kebreab 2  
,   J. A. N. Mills 1,   J. France 2
 
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1
School of Agriculture, Policy and Development, The University of Reading, Earley Gate, Reading, RG6 6AR, UK
2
Centre for Nutrition Modelling, Department of Animal and Poultry Science, University of Guelph, Guelph, Ontario N1G 2W1, Canada
CORRESPONDING AUTHOR
E. Kebreab   

Centre for Nutrition Modelling, Department of Animal and Poultry Science, University of Guelph, Guelph, Ontario N1G 2W1, Canada
Publication date: 2004-10-25
 
J. Anim. Feed Sci. 2004;13(4):557–573
 
KEYWORDS
ABSTRACT
This study sets out to find the best calving pattern for small-scale dairy systems in Michoacan State, central Mexico. Two models were built. First, a linear programming model was constructed to optimize calving pattern and herd structure according to metabolizable energy availability. Second, a Markov chain model was built to investigate three reproductive scenarios (good, average and poor) in order to suggest factors that maintain the calving pattern given by the linear programming model. Though it was not possible to maintain the optimal linear programming pattern, the Markov chain model suggested adopting different reproduction strategies according to period of the year that the cow is expected to calve. Comparing different scenarios, the Markov model indicated the effect of calving interval on calving pattern and herd structure.
 
CITATIONS (2):
1.
Recent advances in modeling nutrient utilization in ruminants1
E. Kebreab, J. Dijkstra, A. Bannink, J. France
Journal of Animal Science
 
2.
Modeling Small-Scale Dairy Farms in Central Mexico Using Multi-Criteria Programming
D. Val-Arreola, E. Kebreab, J. France
Journal of Dairy Science
 
ISSN:1230-1388