Sökning: "milk yield in cows"
Visar resultat 1 - 5 av 29 avhandlingar innehållade orden milk yield in cows.
1. Genetic Heteroscedasticity for Domestic Animal Traits
Sammanfattning : Animal traits differ not only in mean, but also in variation around the mean. For instance, one sire’s daughter group may be very homogeneous, while another sire’s daughters are much more heterogeneous in performance. The difference in residual variance can partially be explained by genetic differences. LÄS MER
2. Milk removal : effect on milk yield, milk composition and milking efficiency in dairy cows
Sammanfattning : Milk from dairy cows is a staple dietary component for humans all over the world. Regardless of whether milk is consumed in its purest, unaltered form or as high-end products such as fine cheese or ice cream, it needs to be of high quality when taken from the cow, produced at a low price and produced in a system that consider aspects such as animal health, animal welfare and sustainability. LÄS MER
3. Assessing phosphorus overfeeding in dairy cows
Sammanfattning : Faecal total phosphorus (TP) from dairy cows consists of a largely insoluble fraction and a soluble P fraction (SP), which mainly represents excess P. The soluble fraction increases proportionately with increased P feeding as excess P is mainly excreted with the faeces in soluble form. LÄS MER
4. Progesterone profiles, oestrus expression and pregnancy in dairy cows
Sammanfattning : The cow’s ability to reproduce is essential for milk production. Traditionally genetic evaluations for fertility have been based on measures on insemination- and calving dates, which in general are highly influenced by on-farm decisions. Unfortunately, the low heritability of classical fertility traits makes the genetic improvement slow. LÄS MER
5. Non-coagulating milk from Swedish Red Dairy Cattle : Influence of milk composition, physical properties and genetic parameters
Sammanfattning : Non-coagulating (NC) milk is unwanted in cheese production, as it lowers cheese yield and prolongs processing time. Less yield will lead to economic losses at the dairies. Even if NC milk has been found in several breeds, studies suggest that Swedish Red Dairy cattle (RDC) has a higher frequency of NC milk than most other breeds. LÄS MER