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Major trace elements limiting livestock performance in New Zealand
1a Alpha Scientific Ltd , PO Box 195 , Hamilton , New Zealand
New Zealand Veterinary Journal
|August 16, 2011
Summary
New Zealand soils often lack essential trace elements like copper and selenium, impacting livestock health. Research has led to effective monitoring and supplementation strategies for farmers to prevent deficiencies.
Area of Science:
- Agricultural Science
- Animal Nutrition
- Soil Science
Background:
- New Zealand soils frequently exhibit natural deficiencies in cobalt, selenium, and copper, or elevated molybdenum levels.
- Pasture grown on these soils can lead to trace element deficiencies in grazing livestock.
- Early research in the 1940s-1950s identified trace element deficiencies as causes of ill-thrift and diseases in livestock.
Purpose of the Study:
- To outline the history and current practices of trace element management in New Zealand livestock.
- To highlight the development of diagnostic tools and supplementation methods for key trace elements.
- To emphasize the importance of trace element monitoring for animal health and productivity.
Main Methods:
- Development of production-related reference ranges for blood and liver copper, vitamin B12, and selenium.
- Implementation of various supplementation strategies, including pasture topdressing, spraying, and direct animal application.
- Establishment of routine trace element monitoring programs for cattle, sheep, and deer.
Main Results:
- Established diagnostic reference ranges aid in preventing and managing trace element deficiencies.
- Diverse supplementation methods cater to different livestock management systems.
- Trace element monitoring is now standard practice for farmers on deficient land.
- Copper deficiency is the most commonly diagnosed trace element issue in deer.
Conclusions:
- New Zealand has advanced significantly in understanding and managing livestock trace element deficiencies.
- Integrated approaches of monitoring and supplementation are crucial for animal health on deficient soils.
- Continued vigilance and application of established protocols ensure optimal livestock production.
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