Österman, Sara
- Institutionen för tillämpad husdjursvetenskap och välfärd, Sveriges lantbruksuniversitet
Sammanfattning
This study was conducted to examine the effect of an extended, 18 months, calving interval (CI) in comparison with a traditional 12 months CI, on milk production and milk composition. In addition, the cows had different milking frequencies (MF), either two or three times per day. This resulted in four treatment groups; referred to as 12-2, 12-3, 18-2 and 18-3. Cows of Swedish Red and White breed were used in the experiment, and the analyses extended over a period of 3 years. Thus, three complete lactations were monitored for cows with 12 months CI and two lactations for cows with 18 months CI, unless the cows were culled during the experiment. The first experimental year, there were 13 cows in each group, and during the second year another five cows were included in each treatment, giving a total of 72 cows for the entire experiment. The achieved calving intervals for the 12 and 18 months CI were 12.2 and 17.5 months, respectively. Cows with 18 months CI had, of course, higher lactation yield, but when the longer lactations were considered there were no differences in milk yield per day of CI. The cows in group 18-3 had higher milk production than 18-2 measured in ECM/day (energy corrected milk) of Cl (P
Nyckelord
Calving interval; milking frequency; milk production
Publicerad i
Livestock Production Science
2003, volym: 82, nummer: 2-3, sidor: 139-149
Utgivare: ELSEVIER SCIENCE BV
SLU författare
UKÄ forskningsämne
Veterinärmedicin
Husdjursvetenskap
Publikationens identifierare
- DOI: https://doi.org/10.1016/S0301-6226(03)00036-8
Permanent länk till denna sida (URI)
https://res.slu.se/id/publ/621