Document Detail

A multi-level hierarchic Markov process with Bayesian updating for herd optimization and simulation in dairy cattle.
MedLine Citation:
PMID:  22118084     Owner:  NLM     Status:  In-Data-Review    
Herd optimization models that determine economically optimal insemination and replacement decisions are valuable research tools to study various aspects of farming systems. The aim of this study was to develop a herd optimization and simulation model for dairy cattle. The model determines economically optimal insemination and replacement decisions for individual cows and simulates whole-herd results that follow from optimal decisions. The optimization problem was formulated as a multi-level hierarchic Markov process, and a state space model with Bayesian updating was applied to model variation in milk yield. Methodological developments were incorporated in 2 main aspects. First, we introduced an additional level to the model hierarchy to obtain a more tractable and efficient structure. Second, we included a recently developed cattle feed intake model. In addition to methodological developments, new parameters were used in the state space model and other biological functions. Results were generated for Dutch farming conditions, and outcomes were in line with actual herd performance in the Netherlands. Optimal culling decisions were sensitive to variation in milk yield but insensitive to energy requirements for maintenance and feed intake capacity. We anticipate that the model will be applied in research and extension.
R M Demeter; A R Kristensen; J Dijkstra; A G J M Oude Lansink; M P M Meuwissen; J A M van Arendonk
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Publication Detail:
Type:  Journal Article    
Journal Detail:
Title:  Journal of dairy science     Volume:  94     ISSN:  1525-3198     ISO Abbreviation:  J. Dairy Sci.     Publication Date:  2011 Dec 
Date Detail:
Created Date:  2011-11-28     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  2985126R     Medline TA:  J Dairy Sci     Country:  United States    
Other Details:
Languages:  eng     Pagination:  5938-62     Citation Subset:  IM    
Copyright Information:
Copyright © 2011 American Dairy Science Association. Published by Elsevier Inc. All rights reserved.
Animal Breeding and Genomics Centre, Wageningen University, 6700 AH, Wageningen, the Netherlands; Business Economics Group, Wageningen University, 6706 KN, Wageningen, the Netherlands.
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