Sökning: "dairy farmers"

Visar resultat 1 - 5 av 34 avhandlingar innehållade orden dairy farmers.

  1. 1. Dairy cattle mating plans at herd level using genomic information

    Författare :Christian Bengtsson; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Sammanfattning : Genotyping of dairy cattle can benefit farmers by increasing the accuracy of breeding values and improving mating plans at herd level. Validation studies on breeding values in this thesis revealed that for the vast majority of traits analysed in Holstein, Jersey and Nordic Red Dairy Cattle, genomically enhanced breeding values for virgin heifers were able to predict cow performance significantly more accurately than parent average breeding values. LÄS MER

  3. 2. Organic dairy production : herd characteristics and genotype by environment interactions

    Författare :Therese Ahlman; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Sammanfattning : The aim of this thesis was to gain further knowledge about the performance of cows in organic dairy production and their ability to adapt to the organic production environment. Milk production traits, fertility traits, somatic cell count (SCC) and longevity traits were analysed in organic and conventional herds and the reasons for culling in the two systems were investigated. LÄS MER

  4. 3. Genetic properties of feed efficiency and related traits in dairy cattle

    Författare :Bingjie Li; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES; LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Sammanfattning : Feed accounts for the largest proportion of operating costs in dairy production. Improving feed efficiency (FE) is expected to increase the profits of dairy farmers and reduce the ecological footprint of dairy production. LÄS MER

  5. 4. Effects of increasing the proportion of high-quality grass silage in the diet of dairy cows

    Författare :Mikaela Lindberg; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Sammanfattning : The Swedish dairy cow has almost doubled its annual milk yield over a few decades. This has simultaneously led to an increase in the dietary proportion of concentrate in order to meet the increased nutritional requirement of dairy cows. LÄS MER

  7. 5. Milk production on smallholder dairy cattle farms in Southern Vietnam : management in relation to udder health

    Författare :Vo Lam; Sveriges lantbruksuniversitet; Sveriges lantbruksuniversitet; []
    Nyckelord :LANTBRUKSVETENSKAPER; AGRICULTURAL SCIENCES;

    Sammanfattning : Dairy production is a rather new and not a traditional system in Vietnam. It is mainly based on smallholder dairy farms. LÄS MER