| Naslov: | Prediction of standard lactation curves for primiparous Holstein cows by using corrected regression models |
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| Avtorji: | ID Jeretina, Janez (Avtor)
ID Babnik, Drago (Avtor)
ID Škorjanc, Dejan (Avtor) |
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| Datoteke: |  Italian_Journal_of_Animal_Science_2015_Jeretina,_Babnik,_Skorjanc_Prediction_of_Standard_Lactation_Curves_for_Primiparous_Holstein_Cows.pdf (497,85 KB)
MD5: ED3A51157D7906618F8A4A72317A4710
PID: 20.500.12556/dkum/3978fa25-e813-4d13-b6a4-49463772a767
 http://www.tandfonline.com/doi/full/10.4081/ijas.2015.3776
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| Jezik: | Angleški jezik |
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| Vrsta gradiva: | Znanstveno delo |
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| Tipologija: | 1.01 - Izvirni znanstveni članek |
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| Organizacija: | FKBV - Fakulteta za kmetijstvo in biosistemske vede
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| Opis: | Prediction of the expected milk yield is important for the management of the primiparous cows (PPC) with a few or no data on their own milk productivity. We developed a system of regression equations for predicting milk yields in standard lactation. The models include the systematic effects of the calving season, the five-year rolling herd average of milk yield of PPC, the breeding values of the parents for milk production, and daily milk recordings. A total of 21,901 lactations of Holstein PPC were collected during the regular monthly milk recordings of cows in the Republic of Slovenia. By including daily milk recordings in the model, the coefficients of determination of regression models for the prediction of milk yield increase: without known recordings (M0) R 2 =0.80; with one recording (M1) R 2 =0.82; with two first consecutive recordings (M2) R 2 =0.86; and with three recordings (M3) R 2 =0.89. Deviations of milk yield up to 500 kg in a standard lactation (<1.6 kg/day) were as follows: with the model M0, they occurred in 53.4% of PPC; with M1, they occurred in 56.3% of PPC; with M2, they occurred in 64.5% of PPC; and with M3, they occurred in 70.9% of PPC. We concluded that the developed system of regression models is an appropriate method for milk yield prediction of PPC. |
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| Ključne besede: | primiparous cows, milk yield, prediction, lactation curves, regression equations |
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| Status publikacije: | Objavljeno |
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| Verzija publikacije: | Objavljena publikacija |
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| Leto izida: | 2015 |
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| Št. strani: | str. 628-633 |
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| Številčenje: | Letn. 14 |
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| PID: | 20.500.12556/DKUM-66996  |
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| ISSN: | 1594-4077 |
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| UDK: | 636.2:637.1 |
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| COBISS.SI-ID: | 4020524 |
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| DOI: | 10.4081/ijas.2015.3776 |
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| ISSN pri članku: | 1594-4077 |
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| NUK URN: | URN:SI:UM:DK:6GWZMICH |
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| Datum objave v DKUM: | 24.07.2017 |
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| Število ogledov: | 1489 |
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| Število prenosov: | 548 |
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| Metapodatki: |    |
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| Področja: | Ostalo
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