New Zealand Dairy Industry

A Dairy Supply Chain Model of the New Zealand Dairy Industry

The seasonal change in milk supply and composition of milk (fat, casein, whey protein and lactose concentration) determine the type and value of dairy products that can be manufactured by a dairy processing plant over the season. Milk composition can be manipulated on-farm using a number of methods. Those methods include animal breeding, feeding, altering calving and lactation patterns, interfe...

Leptospirosis in New Zealand dairy herds

Radioactive Materials in New Zealand Industry

Certain materials "decay" at the atomic level over a period of time, giving off "radiation" in the form of energy or subatomic particles. This radiation can be harnessed and used for a variety of industrial applications. Some of the commonest of these which are used in New Zealand are listed below, although many others exist that are either only used to a small extent or used exclusively overseas.

Short estrous cycles in New Zealand dairy cattle.

Over 18% of cows returning to service within 49 days of first insemination were remated within the first 17 days. A distinct peak representing 31.4% of all short return intervals occurred from 8 to 10 days after first insemination. Because nonreturn rates to second insemination following these service intervals were equal to nonreturn rates for first inseminations, it is probable that some cows...

Copper toxicity in a New Zealand dairy herd

Chronic copper toxicity was diagnosed in a Jersey herd in the Waikato region of New Zealand following an investigation into the deaths of six cattle from a herd of 250 dry cows. Clinical signs and post-mortem examination results were consistent with a hepatopathy, and high concentrations of copper in liver and blood samples of clinically affected animals confirmed copper toxicity. Liver copper ...