Morten Kargo, product manager of DairyCross at VikingGenetics, encouraged more farmers to use sexed semen on higher-ranking females to reduce the genetic lag between dairy cows and artificial insemination bulls.
This requires breeding values for crossbreds, which he said were being developed using parent averages for the three breeds used in the ProCROSS breeding programme.
“We will have breeding values available during the autumn. These will be on VikMate, VikingGenetics' mating plan tool,” he said.
The conference's final speaker, Annica Hansson from Växa, a member cooperative of VikingGenetics, showed that ProCROSS heifers require lower energy growing rations, largely because they reach sexual maturity quicker.
Although she caveated, rations should be balanced for minerals and energy based on forage quality.
She also advised farmers to inseminate on weight rather than height because VikingHolstein and Coopex Montbéliarde are usually taller than VikingRed.
To end, she explained that, at drying off, ProCROSS cows were typically at least half a body condition score ahead of Holsteins.
“At drying off, my goal is to have a BCS of 3-3.5. ProCROSS are a bit heavier and manage fine, but don’t put dry cows on a diet while they are preparing for the next lactation," she said.