Nutrition & Reproduction Archives - New Zealand Association of Ruminant Nutritionists

Management for improved fertility and lifetime productivity in grazing dairy cows: latest NZ research – Claire Phyn, Dairy NZ

Claire Phyn, senior scientist at DairyNZ presented about an 8 year research programme funded by MBIE and NZ dairy farmers through DairyNZ Inc. It aimed to provide management and genetic solutions to improve cow health, fertility and longevity. Claire reported about 1. Effect of carbohydrate type (starch vs fibre) on reproduction 2. Hyperketonaemia (subclinical ketosis) and 3. Feeding synthetic zeolite pre-calving

December 1, 2021 No Comments

Pillars of a New Dairy System, Jane Kay, DairyNZ

DairyNZ have set up a 7 year multidisciplinary R&D programme; looking for solutions to improve fertility and lifetime productivity in dairy herds.

November 27, 2018 No Comments

From Birth to Weaning by Dr Luis Silva

The early life nutrition of calves has a direct impact on performance later in life. Calves need to be grown to reach 50% of their mature bodyweight in the first 12 months and 85% of their mature bodyweight at 24months of age. Colostrum is important in the first few hours with the key points being

August 23, 2018 No Comments

Feeding Fodder Beet to Cows – Rumen pH during transition from pasture.

In this session Dr. Garry Waghorn updated the membership on research pertaining to feeding fodder beet to cows. Some of the key messages include: Not all fodder beets are created equally; nutritional composition varies considerably. Feed testing is warranted. There are still a lot of unknowns when it comes to how fodder beet behaves within the rumen. Individual cows with rumen

August 1, 2018 No Comments

Early nutrition and later consequences. Feeding the prepubertal heifer – Luis Felipe P. Silva , Univ of Queensland

Major factors affecting milk yield are the ability to supply the mammary gland with nutrients and the gland to produce milk. Achieving body size targets at first calving is critical: Loss of 300 kg of milk (1st lact) per -50kg body weight (BW) at calving, loss of 720 kg of milk (3 lact) per -50kg

March 21, 2018 No Comments

Metabolic changes in early lactation and impaired reproductive performance in dairy cows

Metabolic changes in early lactation and impaired reproductive performance in dairy cows – review article Authors: R. Jorritsma, T. Wensing, T.A.M. Kruip, Peter L.A.M.V. os, Jos P.T.M. Noordhuizen Published: Vet Res. 34(2003)11-26 Recommended reading by Ian Sawyer NZARN members a full copy of the presentation is available below if you are logged in. Non-members looking

February 4, 2016 No Comments

Dairy Cow Fertility

Presentation: New Zealand experience in achieving compact calving and strategies for dealing with anoestrus, endometritis and late calving cows. By SCOTT MCDOUGALL, TOM BROWNLIE, MELVIN deBOER AND CHRIS COMPTON COGNOSCO, A DIVISION OF ANEXA ANIMAL HEALTH NZARN members a full copy of the presentation is available below if you are logged in. Non-members looking for

July 3, 2014 No Comments

Trouble-shooting milk fever and downer cow problems

Article: By Richard Adams, Virginia Ishler, Dale Moore (Department of Veterinary Science) Department of Dairy and Animal Health The Pennsylvania State University NZARN members a full copy of the presentation is available below if you are logged in. Non-members looking for more information are encouraged to use our ‘contact a nutritionist’ form and ‘member directory’ to find a member

January 5, 2011 No Comments

NZ Fertility Stats

NZARN members a full copy of the presentation is available below if you are logged in. Non-members looking for more information are encouraged to use our ‘contact a nutritionist’ form and ‘member directory’ to find a member who can help them answer their questions. If you are a Rural Professional interested in joining the NZARN please see our ‘membership’ section.

October 6, 2010 No Comments

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