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2020
Implications of using an extended lactation to change from a spring-calving to an autumncalving farm system in South Taranaki, JWM, Jarman, JK Kay, M Neal, DJ Donaghy, and P Tozer , New Zealand Journal of Animal Science and Production, 09/2020, Volume 80, Online, p.143-149, (2020)
2013
Modelling the effect of temporary once-a-day milking durinmg early lactation on dairy farm production and profitability, EN, Khaembah, AG Rius, PC Beukes, G Levy, P Gregorini, JR Roche, JK Kay, and CVC Phyn , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 73, Hamilton, p.21-25, (2013)
2012
Maintenance energy requirements of non-lactating, pregnant dairy cows, KS, Mandok, SL Greenwood, JK Kay, M Crookenden, and JR Roche , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 72, Christchurch, p.117-119, (2012)
Once-daily milking during a feed deficit improves energy status in early lactating dairy cows, JK, Kay, CVC Phyn, AG Rius, SR Morgan, TM Grala, and JR Roche , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 72, Christchurch, p.129-133, (2012)
2011
BRIEF COMMUNICATION: Effect of milking frequency and concentrate supplementation on milk production during an extended lactation in grazing dairy cows, AG, Rius, CVC Phyn, JK Kay, SR Morgan, TM Grala, and JR Roche , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 71, Invercargill, p.42-44, (2011)
Effect of milking frequency and nutrition in early lactation on milk production and body condition in grazing dairy cows, JK, Kay, CVC Phyn, AG Rius, SR Morgan, TM Grala, and JR Roche , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 71, Invercargill, p.37-41, (2011)
Effect of temporary alterations to milking frequency during the early post-partum period on milk production and body condition score in grazing dairy cows, CVC, Phyn, JK Kay, AG Rius, SR Morgan, CS Roach, TM Grala, and JR Roche , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 71, Invercargill, p.45-49, (2011)
Temporary alterations to milking frequency, immediately post-calving, modified the expression of genes regulating milk synthesis and apoptosis in the bovine mammary gland, TM, Grala, CVC Phyn, JK Kay, AG Rius, MD Littlejohn, RG Snell, and JR Roche , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 71, Invercargill, p.3-8, (2011)
2009
The effect of concentrate supplementation on milk production during an extended lactation in grazing dairy cows : Brief Communication, CVC, Phyn, JK Kay, CG Roach, and ES Kolver , Proceedings of the New Zealand Society of Animal Production, Jun, Volume 69, Christchurch, p.43-45, (2009)
The effect of feed restriction during peak lactation on milk production parameters : Brief Communication, JK, Kay, CVC Phyn, YJ Williams, JR Roche, CR Burke, and S Meier , Proceedings of the New Zealand Society of Animal Production, Jun, Volume 69, Christchurch, p.24-26, (2009)
2007
Production and physiological indicators to select cows suitable for extended lactations, JK, Kay, PW Aspin, CVC Phyn, JR Roche, and ES Kolver , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 67, Wanaka, p.315-319, (2007)
2006
Effects of conjugated linoleic acid on bioenergetics and milk production parameters in grazing dairy cows offered ad libitum or restricted pasture, JK, Kay, TR Mackle, DE Bauman, NA Thomson, and LH Baumgard , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 66, Napier, p.423-428, (2006)
2005
Regulating milk fat synthesis: potential on-farm applications of basic science, LH, Baumgard, JK Kay, CE Moore, JR Roche, MJ Vanbaale, and RP Rhoads , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 65, Christchurch, p.33-39, (2005)
2004
Effect of precalving feeding level on the milk production of grazing dairy cows, JR, Roche, JK Kay, ES Kolver, PW Aspin, J Lee, B Sugar, and AR Napper , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 64, Hamilton, p.227-231, (2004)
2003
Diurnal variation in blood plasma metabolites and insulin of lactating dairy cows grazing pasture and supplemented with a high-lipid supplement either once or twice a day, NA, Thomson, K Singh, and JK Kay , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 63, Queenstown, p.107-111, (2003)
Predicting Delta9-desaturase activity and the association with conjugated linoleic acid (CLA) concentration in bovine milk, NA, Thomson, A Chand, and JK Kay , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 63, Queenstown, p.25-30, (2003)
2002
Concentrations of conjugated linoleic acid in milk from cows grazing pasture of fed a total mixed ration for an entire lactation, MJ, Audlist, JK Kay, NA Thomson, AR Napper, and ES Kolver , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 62, Palmerston North, p.240-241, (2002)
Endogenous synthesis and enhancement of conjugated linolieic acid in pasture-fed dairy cows, JK, Kay, TR Mackle, MJ Auldist, NA Thomson, and DE Bauman , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 62, Palmerston North, p.12-15, (2002)
On-farm management to modify milkfat composition - a review of experiments undertaken at Dexcel to produce a spreadable butter directly from the cow, NA, Thomson, MJ Auldist, JK Kay, AKH MacGibbon, and JJ Murphy , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 62, Palmerston North, p.100-103, (2002)
2001
Effect of stage of lactation on the efficiency of Jersey and Friesian cows at converting pasture to milk production or liveweight gain, NA, Thomson, JK Kay, and MO Bryant , Proceedings of the New Zealand Society of Animal Production, Jan, Volume 61, Christchurch, p.213-216, (2001)