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Positive relationships between body weight of dairy heifers and their first-lactation and accumulated three-parity lactation production

Handcock, R. C.; Lopez-Villalobos, N.; McNaughton, L. R.; Back, P. J.; Edwards, Grant; Hickson, R. E. (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, ...

Milk yield and urinary-nitrogen excretion of dairy cows grazing forb pasture mixtures designed to reduce nitrogen leaching

Bryant, Racheal H.; Welten, B. G.; Costall, D.; Shorten, P. R.; Edwards, Grant (Elsevier, 2018-03)

The effect of including a mixture of forbs in a standard perennial ryegrass-white clover pasture, with or without Italian ryegrass was investigated in a two-period grazing study comparing urinary nitrogen (N) excretion and ...

Effects of feed intake and genetics on tissue nitrogen-15 enrichment and feed conversion efficiency in sheep

Cheng, Paul; Logan, Christopher M.; Dewhurst, Richard J.; Hodge, Simon; Zhou, Huitong; Edwards, Grant (Oxford University Press on behalf of the American Society of Animal Science, 2015-12-01)

This study investigated the effects of sheep genetics and feed intake on nitrogen isotopic fractionation (Δ15N) and feed conversion efficiency (FCE; live weight gain/DMI), using a 2 × 2 factorial design, with 2 levels of ...

Ex-vivo cow rumen fluid fermentation: Changes in microbial populations and fermentation products with different forages

Fang, Haitian; Al-Marashdeh, Omar; Zhou, Huitong; Podolyan, Andriy; Hickford, Jonathan G. H.; Edwards, Grant; Cameron, Keith C.; Cheng, L. (Taylor & Francis, 2018-07-09)

This study investigated the effects of three forage treatments [herbal plantain (PL), ryegrass-white clover pasture (RW) and root crop fodder beet (FB)] on ex-vivo rumen fluid fermentations. Quantitative real-time Polymerase ...

The effects of dietary nitrogen to water-soluble carbohydrate ratio on isotopic fractionation and partitioning of nitrogen in non-lactating sheep

Cheng, Paul; Nicol, Alastair M.; Dewhurst, Richard J.; Edwards, Grant (Cambridge University Press (CUP) on behalf of the Animal Consortium, 2013-08)

The main objective of this study was to investigate the relationship between partitioning and isotopic fractionation of nitrogen (N) in sheep consuming diets with varying ratios of N to water-soluble carbohydrate (WSC). ...