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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 ...
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 ...
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 ...