Modeling lactation curves of “Barrosã” beef cattle with Wood’s model
The aim of this study was to investigate the lactation curve properties of primiparous and multiparous Barrosã cows, using two different milking systems. A data set with 2518 daily milk yields of 15 primiparous (107 test day records by lactation) and 11 multiparous (83 test day records by...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Taylor & Francis Group
2010-04-01
|
| Series: | Italian Journal of Animal Science |
| Subjects: | |
| Online Access: | http://www.aspajournal.it/index.php/ijas/article/view/1801 |
| _version_ | 1819080789371912192 |
|---|---|
| author | Virgilio Cardoso Alves Paulo José Peixoto Fontes Virginia Alice Cruz dos Santos Antόnio Mário Domingues Silvestre José Carlos Marques de Almeida |
| author_facet | Virgilio Cardoso Alves Paulo José Peixoto Fontes Virginia Alice Cruz dos Santos Antόnio Mário Domingues Silvestre José Carlos Marques de Almeida |
| author_sort | Virgilio Cardoso Alves |
| collection | DOAJ |
| description | The aim of this study was to investigate the lactation curve properties of primiparous and multiparous Barrosã cows, using two different milking systems. A data set with 2518 daily milk yields of 15 primiparous (107 test day records by lactation) and 11 multiparous (83 test day records by lactation) cows was individually fitted with the Wood’s model by the application of a non linear procedure. Milk yield measurements were recorded using a weigh-suckle-weigh technique in half of the cows and the rest of the cows were hand milking. Average daily milk yield of primiparous and multiparous suckled cows were 4.9 and 5.2 kg, respectively, while correspondent scores on milked cows were lower (2.4 and 3.0 kg). All 26 fitted lactations followed the typical curve shape with high goodness of fit. ANOVA on Wood’s parameters indicated that milked cows have a peak yield of 3.5 and 4.6 kg reached at lactation day 23 and 16, for primiparous and multiparous, respectively. On the other hand, suckled cows reached their peak of lactation later (56-63 d) and the peak yield (5.3-5.7 kg) was greater than milked cows. The absence of the calf and the cow’s difficulty in adapting to the hand-milking can explain differences between milked and suckled cows. Barrosã cows, in their traditional production system, have lactation yields of 805 and 843 kg in parities 1 and 2, respectively. |
| first_indexed | 2024-12-21T19:50:28Z |
| format | Article |
| id | doaj.art-39b5bcac7ad3424f8ebb3e486cea0226 |
| institution | Directory Open Access Journal |
| issn | 1594-4077 1828-051X |
| language | English |
| last_indexed | 2024-12-21T19:50:28Z |
| publishDate | 2010-04-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Italian Journal of Animal Science |
| spelling | doaj.art-39b5bcac7ad3424f8ebb3e486cea02262022-12-21T18:52:14ZengTaylor & Francis GroupItalian Journal of Animal Science1594-40771828-051X2010-04-0192e47e4710.4081/ijas.2010.e47Modeling lactation curves of “Barrosã” beef cattle with Wood’s modelVirgilio Cardoso AlvesPaulo José Peixoto FontesVirginia Alice Cruz dos SantosAntόnio Mário Domingues SilvestreJosé Carlos Marques de AlmeidaThe aim of this study was to investigate the lactation curve properties of primiparous and multiparous Barrosã cows, using two different milking systems. A data set with 2518 daily milk yields of 15 primiparous (107 test day records by lactation) and 11 multiparous (83 test day records by lactation) cows was individually fitted with the Wood’s model by the application of a non linear procedure. Milk yield measurements were recorded using a weigh-suckle-weigh technique in half of the cows and the rest of the cows were hand milking. Average daily milk yield of primiparous and multiparous suckled cows were 4.9 and 5.2 kg, respectively, while correspondent scores on milked cows were lower (2.4 and 3.0 kg). All 26 fitted lactations followed the typical curve shape with high goodness of fit. ANOVA on Wood’s parameters indicated that milked cows have a peak yield of 3.5 and 4.6 kg reached at lactation day 23 and 16, for primiparous and multiparous, respectively. On the other hand, suckled cows reached their peak of lactation later (56-63 d) and the peak yield (5.3-5.7 kg) was greater than milked cows. The absence of the calf and the cow’s difficulty in adapting to the hand-milking can explain differences between milked and suckled cows. Barrosã cows, in their traditional production system, have lactation yields of 805 and 843 kg in parities 1 and 2, respectively.http://www.aspajournal.it/index.php/ijas/article/view/1801Beef cattle, Lactation curve, Parity, Milking system. |
| spellingShingle | Virgilio Cardoso Alves Paulo José Peixoto Fontes Virginia Alice Cruz dos Santos Antόnio Mário Domingues Silvestre José Carlos Marques de Almeida Modeling lactation curves of “Barrosã” beef cattle with Wood’s model Italian Journal of Animal Science Beef cattle, Lactation curve, Parity, Milking system. |
| title | Modeling lactation curves of “Barrosã” beef cattle with Wood’s model |
| title_full | Modeling lactation curves of “Barrosã” beef cattle with Wood’s model |
| title_fullStr | Modeling lactation curves of “Barrosã” beef cattle with Wood’s model |
| title_full_unstemmed | Modeling lactation curves of “Barrosã” beef cattle with Wood’s model |
| title_short | Modeling lactation curves of “Barrosã” beef cattle with Wood’s model |
| title_sort | modeling lactation curves of barrosa beef cattle with wood s model |
| topic | Beef cattle, Lactation curve, Parity, Milking system. |
| url | http://www.aspajournal.it/index.php/ijas/article/view/1801 |
| work_keys_str_mv | AT virgiliocardosoalves modelinglactationcurvesofbarrosabeefcattlewithwoodsmodel AT paulojosepeixotofontes modelinglactationcurvesofbarrosabeefcattlewithwoodsmodel AT virginiaalicecruzdossantos modelinglactationcurvesofbarrosabeefcattlewithwoodsmodel AT antoniomariodominguessilvestre modelinglactationcurvesofbarrosabeefcattlewithwoodsmodel AT josecarlosmarquesdealmeida modelinglactationcurvesofbarrosabeefcattlewithwoodsmodel |