In Amsterdam RC’s complete profile, dairy farmer Hans van Middelaar recognizes Sterksel Paula 238, the bull’s dam. “She is a well-built, flawless second-calf cow and was scored 86 points as a heifer,” he explains. “Paula calved last year during the bluetongue outbreak and started off slowly. But thirty days after her second calving, she is already being milked four times a day in the robot and produces 42 kg of milk.”Van Middelaar bred Amsterdam RC’s dam from the successful Delta cow family, which traces back to Pietje 52, the foundation cow behind bulls such as Delta Perfect, Delta Activator, Broekhuizen Peter P, and Delta Samurai P. Taskforce P daughter Paula was intensively used for breeding as a heifer, partly due to her high breeding values for health traits and unique fertility score. She fully realizes this genetic potential in practice. “After intensive IVP sessions, she was in calf after her first insemination as a heifer,” Van Middelaar explains. “And even as a heifer, she only needed one insemination and achieved a calving interval of 341 days.”
The new InSire top bull Delta Amsterdam RC gives dairy farmers more options
The Boreso son Delta Amsterdam RC passes on over 1,100 kg of milk with +0.19% protein and €369 Inet. The FeedExcel bull combines this with a feed efficiency score of 107. This means his
daughters will produce 3.5% more milk per kilogram of dry matter than daughters of an average bull. They also produce persistently (109) and mature later (106). Additionally, Amsterdam RC shows a complete conformation profile with a flawless rump and scores of 106 for udder, 105 for legs, and 107 for overall conformation in the top line. Above all, Amsterdam RC excels in health and fertility, with 107 for udder health, 110 for claw health, and 105 for fertility, resulting in +8% CRV Health. For example, Amsterdam daughters will have 8 percentage points fewer claw problems than daughters of an average bull and about 5 percentage points less subclinical mastitis. His fertility breeding values indicate an eight-day shorter interval between first and last insemination and a 3-percentage-point higher non-return rate.
From a complete, fertile dam
