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Body weight of dairy heifers is positively associated with reproduction and stayability
(American Dairy Science Association, 2020-02-26)
This study investigated the relationships between body weight (BW) and stayability, and BW and calving pattern, of 189,936 New Zealand dairy heifers. Heifers were classified into 5 breed groups: Holstein-Friesian (F), ...
Effects of FABP4 variation on milk fatty-acid composition for dairy cattle grazed on pasture in late lactation
(Cambridge University Press on behalf of the Hannah Dairy Research Foundation, 2020-01-31)
This research communication describes associations between variation in the fatty acid binding protein 4 gene (FABP4) and milk fat composition in New Zealand Holstein-Friesian × Jersey cross dairy cows. After correcting ...
Positive relationships between body weight of dairy heifers and their first-lactation and accumulated three-parity lactation production
(Elsevier on behalf of the American Dairy Science Association and the Federation of Animal Science Societies, 2019-03-01)
This study investigated the relationships between body weight (BW) and milk production of 140,113 New Zealand dairy heifers. Heifers were classified into 5 breed groups: Holstein-Friesian, Holstein-Friesian crossbred, ...
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 ...
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 ...
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 ...
Requirements for zero energy balance of nonlactating, pregnant dairy cows fed fresh autumn pasture are greater than currently estimated
(Elsevier on behalf of the American Dairy Science Association, 2013-06)
Fifty-three nonlactating, pregnant Holstein-Friesian and Holstein-Friesian × Jersey cross dairy cows were grouped into 4 cohorts (n = 15, 12, 13, and 13) and offered 1 of 3 allowances of fresh, cut pasture indoors for 38 ...