Sökning: "holstein kor"

Visar resultat 1 - 5 av 51 uppsatser innehållade orden holstein kor.

  1. 1. Äggstockscystor hos mjölkkor : en jämförelse av den kliniska bilden, förekomst, och diagnostiken idag mot för 10–20 år sedan

    Master-uppsats, SLU/Dept. of Clinical Sciences

    Författare :Julia Nygårds; [2024]
    Nyckelord :follikelcysta; fruktsamhetstörning; fertilitet; riskfaktorer;

    Sammanfattning : Äggstockscystor är en vanlig anledning till nedsatt fruktsamhet hos mjölkkor. Tillståndet uppstår till följd av en utebliven ägglossning där follikeln fortsätter att växa och blir kvarstående i äggstocken. Cystorna gör korna infertila under tiden som de finns kvar i äggstocken och kan därmed förlänga kalvningsintervallet. LÄS MER

  3. 2. Comparing crossbred and purebred dairy cows for economically important traits

    Master-uppsats, SLU/Dept. of Animal Breeding and Genetics

    Författare :Sofie Liedgren; [2022]
    Nyckelord :Crossbreed; Holstein; Montbéliarde; Jersey; Fertility; Production;

    Sammanfattning : The use of dairy x dairy crossbreeding as a breeding strategy has increased in Sweden, which has led to an increase of Brown Swiss, Jersey and Montbéliarde crosses. Multiple studies have been done on Montbéliarde and Jersey crossbreds in the USA but to our knowledge, no such study has been done on Swedish data. LÄS MER

  4. 3. Quality parameters and protein profile in raw milk from individual cows with different lactation number and breed

    Master-uppsats, SLU/Department of Molecular Sciences

    Författare :Jennifer Hallqvist; [2022]
    Nyckelord :Raw milk quality; protein profile; actation number; Swedish Red; Swedish Holstein;

    Sammanfattning : Swedish dairy cows have an average life expectancy of 5 years, which means that each cow undergoes about 2.5 lactation cycles through her life. Reasons for culling dairy cows are mainly impaired fertility, udder health (mastitis) and low milk yield. LÄS MER

  5. 4. Time budgets of dairy cows in cow-calf contact system with automatic milking

    Master-uppsats, SLU/Dept. of Animal Nutrition and Management

    Författare :Teresa Johansson; [2021]
    Nyckelord :Dairy cows; Time budget; AMS; Cow-calf contact;

    Sammanfattning : Time budgets of dairy cattle are useful to determine the amount of time the cows can allocate to all the behaviours throughout the day. In an automatic milking system (AMS), time budgets are of interest as the individuals are able to choose how to spend the majority of their time, besides the time in the milking robot, and can be used to ensure adequate amounts of time are spent on essential behaviours, such as lying and eating. LÄS MER

  7. 5. Changes in bull breeding during the years : a comparison between 1950 and 1980/90 century

    Master-uppsats, SLU/Dept. of Animal Breeding and Genetics

    Författare :Moa Hagelberg; [2020]
    Nyckelord :Bulls; breeding; SNP; traits; decades; production; health; SLB; Holstein; SRB;

    Sammanfattning : Breeding on bulls have occurred during many decades in the same way as it has for dairy cattle. Both the sire and dams that are being used during the selection breeding have been tested through genomic selection to see their value for each trait, for the dams this has been started more recently than for the bulls. LÄS MER