Comparison of the fit of automatic milking system and test-day records with the use of lactation curves
Objective The aim of the paper was to compare the fit of data derived from daily automatic milking systems (AMS) and monthly test-day records with the use of lactation curves; data was analysed separately for primiparas and multiparas. Methods The study was carried out on three Polish Holstein-Fries...
| Main Authors: | , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Asian-Australasian Association of Animal Production Societies
2020-03-01
|
| Series: | Asian-Australasian Journal of Animal Sciences |
| Subjects: | |
| Online Access: | http://www.ajas.info/upload/pdf/ajas-19-0190.pdf |
| _version_ | 1818161499341848576 |
|---|---|
| author | B. Sitkowska M. Kolenda D. Piwczyński |
| author_facet | B. Sitkowska M. Kolenda D. Piwczyński |
| author_sort | B. Sitkowska |
| collection | DOAJ |
| description | Objective The aim of the paper was to compare the fit of data derived from daily automatic milking systems (AMS) and monthly test-day records with the use of lactation curves; data was analysed separately for primiparas and multiparas. Methods The study was carried out on three Polish Holstein-Friesians (PHF) dairy herds. The farms were equipped with an automatic milking system which provided information on milking performance throughout lactation. Once a month cows were also subjected to test-day milkings (method A4). Most studies described in the literature are based on test-day data; therefore, we aimed to compare models based on both test-day and AMS data to determine which mathematical model (Wood or Wilmink) would be the better fit. Results Results show that lactation curves constructed from data derived from the AMS were better adjusted to the actual milk yield (MY) data regardless of the lactation number and model. Also, we found that the Wilmink model may be a better fit for modelling the lactation curve of PHF cows milked by an AMS as it had the lowest values of Akaike information criterion, Bayesian information criterion, mean square error, the highest coefficient of determination values, and was more accurate in estimating MY than the Wood model. Although both models underestimated peak MY, mean, and total MY, the Wilmink model was closer to the real values. Conclusion Models of lactation curves may have an economic impact and may be helpful in terms of herd management and decision-making as they assist in forecasting MY at any moment of lactation. Also, data obtained from modelling can help with monitoring milk performance of each cow, diet planning, as well as monitoring the health of the cow. |
| first_indexed | 2024-12-11T16:18:44Z |
| format | Article |
| id | doaj.art-12480efb2561478d856e47a2ea169607 |
| institution | Directory Open Access Journal |
| issn | 1011-2367 1976-5517 |
| language | English |
| last_indexed | 2024-12-11T16:18:44Z |
| publishDate | 2020-03-01 |
| publisher | Asian-Australasian Association of Animal Production Societies |
| record_format | Article |
| series | Asian-Australasian Journal of Animal Sciences |
| spelling | doaj.art-12480efb2561478d856e47a2ea1696072022-12-22T00:58:53ZengAsian-Australasian Association of Animal Production SocietiesAsian-Australasian Journal of Animal Sciences1011-23671976-55172020-03-0133340841510.5713/ajas.19.019024300Comparison of the fit of automatic milking system and test-day records with the use of lactation curvesB. Sitkowska0M. Kolenda1D. Piwczyński2 Department of Biotechnology and Animal Genetics, Faculty of Animal Breeding and Biology, UTP University of Science and Technology, Mazowiecka 28, 85-084 Bydgoszcz, Poland Department of Biotechnology and Animal Genetics, Faculty of Animal Breeding and Biology, UTP University of Science and Technology, Mazowiecka 28, 85-084 Bydgoszcz, Poland Department of Biotechnology and Animal Genetics, Faculty of Animal Breeding and Biology, UTP University of Science and Technology, Mazowiecka 28, 85-084 Bydgoszcz, PolandObjective The aim of the paper was to compare the fit of data derived from daily automatic milking systems (AMS) and monthly test-day records with the use of lactation curves; data was analysed separately for primiparas and multiparas. Methods The study was carried out on three Polish Holstein-Friesians (PHF) dairy herds. The farms were equipped with an automatic milking system which provided information on milking performance throughout lactation. Once a month cows were also subjected to test-day milkings (method A4). Most studies described in the literature are based on test-day data; therefore, we aimed to compare models based on both test-day and AMS data to determine which mathematical model (Wood or Wilmink) would be the better fit. Results Results show that lactation curves constructed from data derived from the AMS were better adjusted to the actual milk yield (MY) data regardless of the lactation number and model. Also, we found that the Wilmink model may be a better fit for modelling the lactation curve of PHF cows milked by an AMS as it had the lowest values of Akaike information criterion, Bayesian information criterion, mean square error, the highest coefficient of determination values, and was more accurate in estimating MY than the Wood model. Although both models underestimated peak MY, mean, and total MY, the Wilmink model was closer to the real values. Conclusion Models of lactation curves may have an economic impact and may be helpful in terms of herd management and decision-making as they assist in forecasting MY at any moment of lactation. Also, data obtained from modelling can help with monitoring milk performance of each cow, diet planning, as well as monitoring the health of the cow.http://www.ajas.info/upload/pdf/ajas-19-0190.pdfautomatic milking systemlactation curvetest-day milkingcattle |
| spellingShingle | B. Sitkowska M. Kolenda D. Piwczyński Comparison of the fit of automatic milking system and test-day records with the use of lactation curves Asian-Australasian Journal of Animal Sciences automatic milking system lactation curve test-day milking cattle |
| title | Comparison of the fit of automatic milking system and test-day records with the use of lactation curves |
| title_full | Comparison of the fit of automatic milking system and test-day records with the use of lactation curves |
| title_fullStr | Comparison of the fit of automatic milking system and test-day records with the use of lactation curves |
| title_full_unstemmed | Comparison of the fit of automatic milking system and test-day records with the use of lactation curves |
| title_short | Comparison of the fit of automatic milking system and test-day records with the use of lactation curves |
| title_sort | comparison of the fit of automatic milking system and test day records with the use of lactation curves |
| topic | automatic milking system lactation curve test-day milking cattle |
| url | http://www.ajas.info/upload/pdf/ajas-19-0190.pdf |
| work_keys_str_mv | AT bsitkowska comparisonofthefitofautomaticmilkingsystemandtestdayrecordswiththeuseoflactationcurves AT mkolenda comparisonofthefitofautomaticmilkingsystemandtestdayrecordswiththeuseoflactationcurves AT dpiwczynski comparisonofthefitofautomaticmilkingsystemandtestdayrecordswiththeuseoflactationcurves |