As one of the effective ways of reducing the cost and increase the revenue, feeding dairy cows with individual precision in quantity could further develop the production potential of high-yield dairy cows and improve the milk yield of every dairy cow. Therefore, based on three kinds of technologies of radio frequency identification technology, wireless transmission technology and infrared techn...

the objective of this study was to assess the discounted genetic expressions (dges) for different categories of animal traits as regards holstein cattle of iran. using discounted gene-flow principles, dges per calf born were estimated for self replacing females and also for their sires. in the situation for sires of self replacing females, relative gdes per cow per year for annual cow traits, t...

Pregnancy, decreased feed intake during late gestation, lactogenesis, and parturition have dramatic effects on metabolism in dairy cows during the transition period from 3 wk before calving to 3 wk after calving. Increases in plasma NEFA occur during the 10 d before calving and may precede the decrease in feed intake. Plasma NEFA concentrations are highest at calving and decrease rapidly after ...

and Implications Regions of the genome associated with variation in feed efficiency and dry matter intake were identified using data from 3306 Holstein cows from Europe and North America. For feed efficiency, regions that explained the most variation were located on chromosomes 18, 5, and 3. For dry matter intake, top regions were 26, 5, and 25. For both traits no one region explained more than...

This paper addresses the use of ontologies for combining different sensor data sources to enable big data analysis in the dairy farming domain. We have made existing data sources accessible via linked data RDF mechanisms using OWL ontologies on Virtuoso and D2RQ triple stores. In addition, we have created a common ontology for the domain and mapped it to the existing ontologies of the different...

Mineral supplements to the cowherd during summer grazing are an important management practice to improve cow and calf health and performance. Mineral supplements provided to the cowherd can contain Aureomycin for the control of active anaplasmosis infections or Rumensin to improve feed efficiency and coccidiosis control. This study compared the effects of supplying a mineral supplement containi...

This study uses heteroskedastic Tobit and Censored Least Absolute Deviations models to examine the impacts of dairy cow ownership on selected outcomes for a sample of 184 households in coastal Kenya. The outcomes examined include gross household cash income, gross non-agricultural income, consumption of dairy products, time allocated to cattlerelated tasks, number of labourers hired and total w...

For a beef cow to continue in an annual production cycle, she must rebreed within 3 mo after calving. Malnutrition during this period frequently results in failure of the cow to become pregnant. The energetic needs of the cow are increased by lactation, and additional energy is required for growth of the primiparous cow. Determining energy expenditures during the first 40 to 60 d postpartum is ...

Milk is the most nourishing natural biofl uid. Milk bioactives contribute signifi cantly to meeting nutrient requirements while minimizing the risks of cancers, traumas, and metabolic complexities. Some mothers may not be able to feed their infants breast milk for a prolonged period. Very young infants and the elderly may be intolerant to cow milk and its proteins and cholesterol. Th us, viable...