New Zealand Journal of Agricultural Research, Volume 64, Issue 1 (2021)

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New Zealand Journal of Agricultural Research, Volume 64, Issue 1 (2021)

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Special issue: Recent advances in grazed pasture based dairy science. Editor: Timothy Clough

Editorial

Editorial
Recent advances in grazed pasture-based dairy science
Timothy J. Clough
Pages: 1-2
Published online: 13 Jan 2021
CitationforRecent advances in grazed pasture-based dairy science | Full Text | References | PDF (304.9 KB) | EPUB
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Free Access

Research articles

Article
Production, profit and nitrogen flows in irrigated dairy systems representing different industry development pathways: the Pastoral 21 experience in Canterbury
David F. Chapman, Dawn E. Dalley, Grant R. Edwards, Keith C. Cameron, Brendon J. Malcolm, Anna Clement, Alvaro J. Romera, Ina B. Pinxterhuis, Pierre C. Beukes, Hong J. Di, Racheal H. Bryant & Jeff Curtis
Pages: 3-35
Published online: 26 Aug 2020
AbstractforProduction, profit and nitrogen flows in irrigated dairy systems representing different industry development pathways: the Pastoral 21 experience in Canterbury | Full Text | References | PDF (3.2 MB) | EPUB | Supplemental
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Article
Effect of a late summer diet change from pasture to brassica crop and silages on dairy cow milk production and urinary nitrogen excretion
Nouman Kyamanywa, Isabel M. Tait, Courtney M. Mitchell, Mike J. Hedley, David Pacheco & Peter Bishop
Pages: 36-55
Published online: 02 Feb 2020
AbstractforEffect of a late summer diet change from pasture to brassica crop and silages on dairy cow milk production and urinary nitrogen excretion | Full Text | References | PDF (1.8 MB) | EPUB
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Short communication

Brief Report
There is no relationship between plasma amino acid concentration and urinary nitrogen concentration in heifers fed plantain or ryegrass
Innocent Rugoho, Glenn Judson, Grant Edwards & Long Cheng
Pages: 56-61
Published online: 20 Apr 2020
AbstractforThere is no relationship between plasma amino acid concentration and urinary nitrogen concentration in heifers fed plantain or ryegrass | Full Text | References | PDF (876.3 KB) | EPUB
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Research articles

Article
Genetic parameters for efficiency of crude protein utilisation and its relationship with production traits across lactations in grazing dairy cows
Hewa B. P. C. Ariyarathne, Martin Correa-Luna, Hugh T. Blair, Dorian J. Garrick & Nicolas Lopez-Villalobos
Pages: 62-82
Published online: 19 Feb 2020
AbstractforGenetic parameters for efficiency of crude protein utilisation and its relationship with production traits across lactations in grazing dairy cows | Full Text | References | PDF (2.4 MB) | EPUB
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Article
Linear versus seasonal growth of dairy heifers decreased age at puberty but did not affect first lactation milk production
Rhiannon C. Handcock, Catriona M. C. Jenkinson, Richard Laven, Lorna R. McNaughton, Nicolas Lopez-Villalobos, Penny J. Back & Rebecca E. Hickson
Pages: 83-100
Published online: 25 Apr 2019
AbstractforLinear versus seasonal growth of dairy heifers decreased age at puberty but did not affect first lactation milk production | Full Text | References | PDF (1.6 MB) | EPUB
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Article
Effect of DGAT1 variant (K232A) on milk traits and milk fat composition in outdoor pasture-grazed dairy cattle
Yunhai Li, Huitong Zhou, Long Cheng, Grant R. Edwards & Jonathan G. H. Hickford
Pages: 101-113
Published online: 20 Mar 2019
AbstractforEffect of DGAT1 variant (K232A) on milk traits and milk fat composition in outdoor pasture-grazed dairy cattle | Full Text | References | PDF (1.4 MB) | EPUB | Supplemental
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Short communication

Brief Report
Effects of bovine leptin gene variation on milk traits in New Zealand Holstein-Friesian × Jersey-cross dairy cows
Ishaku L. Haruna, Yunhai Li, Huitong Zhou & Jon G. H. Hickford
Pages: 114-121
Published online: 08 Nov 2020
AbstractforEffects of bovine leptin gene variation on milk traits in New Zealand Holstein-Friesian × Jersey-cross dairy cows | Full Text | References | PDF (929.1 KB) | EPUB
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Brief report

Brief Report
Genetic parameters across milking frequency for first lactation milk production traits in New Zealand
Felipe Lembeye, Nicolás López-Villalobos, Jennifer L. Burke & Steve R. Davis
Pages: 122-126
Published online: 30 Apr 2020
AbstractforGenetic parameters across milking frequency for first lactation milk production traits in New Zealand | Full Text | References | PDF (606.7 KB) | EPUB
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Research article

Article
Selection scheme designs for dairy cattle milked once daily in New Zealand: a deterministic approach
Felipe Lembeye, Nicolás López-Villalobos, Jennifer L. Burke & Steve R. Davis
Pages: 127-142
Published online: 02 Dec 2020
AbstractforSelection scheme designs for dairy cattle milked once daily in New Zealand: a deterministic approach | Full Text | References | PDF (1.3 MB) | EPUB
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