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Variation in the toll-like receptor 4 (TLR4) gene affects milk traits in dairy cows
(Cambridge University Press on behalf of the Institute of Food Research and the Hannah Research Institute, 2017-11)
The objective of this Research Communication was to use polymerase chain reaction-single stranded conformational polymorphism (PCR-SSCP) analysis to investigate a region of the bovine TLR4 gene (TLR4) in pasture-fed New ...
Grazing dairy cows with low milk urea nitrogen breeding values excrete less urinary urea nitrogen
(Elsevier, 2020-10-15)
There is an increasing pressure on temperate pastoral dairy production systems to reduce environmental impacts, coming from the inefficient use of N by cows in the form of excessive urinary N excretion and subsequent N ...
Screening for diets that reduce urinary nitrogen excretion and methane emissions while maintaining or increasing production by dairy cows
(Elsevier, 2016-05-01)
Farmers face complex decisions at the time to feed animals, trying to achieve production goals while contemplating social and environmental constraints. Our purpose was to facilitate such decision making for pastoral dairy ...
Technical note: Nitrogen isotopic fractionation can be used to predict nitrogen-use efficiency in dairy cows fed temperate pasture
(Oxford University Press on behalf of the American Society of Animal Science, 2013-12)
The objective of this study was to investigate the relationship between nitrogen isotopic fractionation (δ¹⁵N) and nitrogen-use efficiency (milk nitrogen/nitrogen intake; NUE) in pasture-fed dairy cows supplemented with ...
Refugia-based strategies for parasite control in livestock
(Elsevier, 2020-03)
Key points:
Refugia-based strategies are intended to help slow the development of anthelmintic resistance by leaving a population unexposed to a treatment.
Refugia can be supplied in several forms and through a variety of ...
Nitrogen partitioning and milk production of dairy cows grazing simple and diverse pastures
(Elsevier on behalf of the American Dairy Science Association, 2013-01)
Research was conducted to examine the effects of a diverse pasture mix on dry matter intake, milk yield, and N partitioning of lactating dairy cows. A pasture containing only ryegrass and white clover (RG), or high ...
Timing of supplementation alters grazing behavior and milk production response in dairy cows
(Elsevier on behalf of the American Dairy Science Association, 2013-01)
Offering feed supplements to grazing dairy cows results in substitution of pasture; however, previous data indicate that the time at which concentrate supplements are offered might affect the level of substitution. These ...
Haplotypic variation in the UCP1 gene is associated with milk traits in dairy cows
(American Dairy Science Association, 2016-10-03)
Uncoupling protein-1 (UCP1) plays a role in the regulation of body temperature, metabolic rate and energy expenditure in animals. While variation in UCP1 and its phenotypic effect has been investigated in humans and sheep, ...
Supplementing grape marc to cows fed a pasture-based diet as a method to alter nitrogen partitioning and excretion
(Elsevier on behalf of the American Dairy Science Association, 2012-02)
The inclusion of the grape marc into livestock rations provides an opportunity not only to use a waste byproduct resourcefully, but also to induce beneficial metabolic changes in animals. Grape marc contains
condensed ...
Effect of time of maize silage supplementation on herbage intake, milk production, and nitrogen excretion of grazing dairy cows
(Elsevier on behalf of the American Dairy Science Association, 2016-09)
The objective of this study was to evaluate the effect of feeding maize silage at different times before a short grazing bout on dry matter (DM) intake, milk production, and N excretion of dairy cows. Thirty-six Friesian ...