Document Detail


Optimal replacement policies for dairy cows based on daily yield measurements.
MedLine Citation:
PMID:  20059907     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
Markov decision processes (MDP) with finite state and action space have often been used to model sequential decision making over time in dairy herds. However, the length of each stage has been at least 1 mo, resulting in models that do not support decisions on a daily basis. The present paper describes the first step of developing an MDP model that can be integrated into a modern herd management system. A hierarchical MDP was formulated for the dairy cow replacement problem with stage lengths of 1 d. It can be used to assist the farmer in replacement decisions on a daily basis and is based on daily milk yield measurements that are available in modern milking systems. Bayesian updating was used to predict the performance of each cow in the herd and economic decisions were based on the prediction. Moreover, parameters in the model were estimated using data records of the specific herd under consideration. This includes herd-specific lactation curves.
Authors:
L R Nielsen; E J?rgensen; A R Kristensen; S Ostergaard
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of dairy science     Volume:  93     ISSN:  1525-3198     ISO Abbreviation:  J. Dairy Sci.     Publication Date:  2010 Jan 
Date Detail:
Created Date:  2010-01-11     Completed Date:  2010-04-19     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  2985126R     Medline TA:  J Dairy Sci     Country:  United States    
Other Details:
Languages:  eng     Pagination:  75-92     Citation Subset:  IM    
Copyright Information:
Copyright 2010 American Dairy Science Association. Published by Elsevier Inc. All rights reserved.
Affiliation:
Department of Business Studies, Aarhus University, Fuglesangs All? 4, DK-8210 Aarhus V, Denmark. lars@relund.dk
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MeSH Terms
Descriptor/Qualifier:
Animals
Cattle / physiology*
Dairying / methods*
Female
Lactation / physiology
Models, Biological*

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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