Comparison of statistical models to estimate daily milk yield in single milking testing schemes
Different statistical models were compared to estimate daily milk yield from morning or evening milking test results. The experiment was conducted on 14 family farms with 325 recorded cows. The amount of explained variance was higher for models including the effects of partial milk yield, the interv...
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2010-01-01
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Series: | Italian Journal of Animal Science |
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Online Access: | http://www.aspajournal.it/index.php/ijas/article/view/914 |
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doaj-44d8a71bdedf413c800c348dfeb5f0842020-11-25T02:16:07ZengTaylor & Francis GroupItalian Journal of Animal Science1594-40771828-051X2010-01-0143s272910.4081/ijas.2005.3s.27Comparison of statistical models to estimate daily milk yield in single milking testing schemesMarija KlopcˇicKresˇimir KuterovacVesna GantnerSonja JovanovacDifferent statistical models were compared to estimate daily milk yield from morning or evening milking test results. The experiment was conducted on 14 family farms with 325 recorded cows. The amount of explained variance was higher for models including the effects of partial milk yield, the interval between successive milking, the interaction between partial milk yield and the milking interval and the farm (R2 = 0.976 for AM, R2 = 0.956 for PM) than for models including partial milk yield effect only (R2 = 0.957 for AM, R2 = 0.937 for PM). Estimates of daily milk yield from linear models were more accurate than those obtained by doubling single milking weights. The results show that more complex model gives the best fit to the data. Differences between models according to determination and correlation coefficient were minor. Further investigations on larger sets of data are needed to draw more general conclusion.http://www.aspajournal.it/index.php/ijas/article/view/914Milk recording, AT method, Daily milk yield, Estimation |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Marija Klopcˇic Kresˇimir Kuterovac Vesna Gantner Sonja Jovanovac |
spellingShingle |
Marija Klopcˇic Kresˇimir Kuterovac Vesna Gantner Sonja Jovanovac Comparison of statistical models to estimate daily milk yield in single milking testing schemes Italian Journal of Animal Science Milk recording, AT method, Daily milk yield, Estimation |
author_facet |
Marija Klopcˇic Kresˇimir Kuterovac Vesna Gantner Sonja Jovanovac |
author_sort |
Marija Klopcˇic |
title |
Comparison of statistical models to estimate daily milk yield in single milking testing schemes |
title_short |
Comparison of statistical models to estimate daily milk yield in single milking testing schemes |
title_full |
Comparison of statistical models to estimate daily milk yield in single milking testing schemes |
title_fullStr |
Comparison of statistical models to estimate daily milk yield in single milking testing schemes |
title_full_unstemmed |
Comparison of statistical models to estimate daily milk yield in single milking testing schemes |
title_sort |
comparison of statistical models to estimate daily milk yield in single milking testing schemes |
publisher |
Taylor & Francis Group |
series |
Italian Journal of Animal Science |
issn |
1594-4077 1828-051X |
publishDate |
2010-01-01 |
description |
Different statistical models were compared to estimate daily milk yield from morning or evening milking test results. The experiment was conducted on 14 family farms with 325 recorded cows. The amount of explained variance was higher for models including the effects of partial milk yield, the interval between successive milking, the interaction between partial milk yield and the milking interval and the farm (R2 = 0.976 for AM, R2 = 0.956 for PM) than for models including partial milk yield effect only (R2 = 0.957 for AM, R2 = 0.937 for PM). Estimates of daily milk yield from linear models were more accurate than those obtained by doubling single milking weights. The results show that more complex model gives the best fit to the data. Differences between models according to determination and correlation coefficient were minor. Further investigations on larger sets of data are needed to draw more general conclusion. |
topic |
Milk recording, AT method, Daily milk yield, Estimation |
url |
http://www.aspajournal.it/index.php/ijas/article/view/914 |
work_keys_str_mv |
AT marijaklopcˇic comparisonofstatisticalmodelstoestimatedailymilkyieldinsinglemilkingtestingschemes AT kresˇimirkuterovac comparisonofstatisticalmodelstoestimatedailymilkyieldinsinglemilkingtestingschemes AT vesnagantner comparisonofstatisticalmodelstoestimatedailymilkyieldinsinglemilkingtestingschemes AT sonjajovanovac comparisonofstatisticalmodelstoestimatedailymilkyieldinsinglemilkingtestingschemes |
_version_ |
1724892648611774464 |