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- Title
Durch- und Dauermelken bei Milchziegen 1. Mitteilung: Analyse der systematischen Effekte auf Milchleistungsmerkmale.
- Authors
WOLBER, MARIE-ROSA; HAMANN, H.; HEROLD, PERA
- Abstract
Data analysis showed that the number of days in milk within a lactation has increased in recent years. It has to be analyzed if the lactation structure has an effect on milk yield, ingredients (fat content, protein content), persistence (milk yield, fat and protein yield) and the somatic cell score (SCS). In total, data from 16.579 German Fawn (BDE) and German White (WDE) dairy goats (years of birth: 1988-2015; years of kidding: 1991-2016,) were available. It was distinguished between continuous and extended lactations. Furthermore, the lactations were split into 120-day sections. In addition, it was taken into account whether there has been extended milking or milking through in the current or previous lactation. For both, the BDE and the WDE, most animals were milked extendedly and milked continuously during the end of the second lactation. Extended milking during the previous lactation had a significant positive effect on milk yield (kg) and a negative effect on protein content (%) and fat content (%), especially regarding the first lactation period. If milked for more than 305 days, the persistence for milk yield and the sum of fat and protein yield during the second lactation period was significantly higher (+ 13% and + 12%) than in lactations not defined as an extended milking lactation. Milking through before lactation had a negative effect on the SCS in the first lactation period. In subsequent lactations, it could be seen that the extended milking in prior lactation had a negative effect on the SCS in the second lactation period.
- Publication
Züchtungskunde, 2018, Vol 90, Issue 5, p379
- ISSN
0044-5401
- Publication type
Article