PRINCIPLE No 4
CASE STUDY GRAZING ANIMALS [MINERALS]
Most mineral deficiencies fall into two general categories:
- A STRAIGHT deficiency
- AN INDUCED deficiency
Most deficiencies are induced and seldom come in "single" deficiencies.
Cattle and sheep need at least 15 minerals to be happy and healthy. Generally element [trace] deficiencies
in animals are seasonal and therefore can "sneak up" on you. However, when you first notice a mineral deficiency,
it has often been developing for a long period often unnoticed [subclinical] before the visible [clinical]
deficiency become apparent.
Seasonal deficiencies can be a result of a combination of:
As you can now see -
- low elemental status of the soil,
- reduced concentration of the trace element in the pasture,
- the pasture composition [has N been used],
- the animal's selection of plant species,
- antagonism with one or more elements at a soil, plant or animal level,
- increasing demands on animals due to growth, pregnancy or lactation,
- low body reserves of the element i.e. in the liver or kidneys [time factor] &
- the inability for the animal to access a supplement of the element[s],
- the extended length of time spent in a "deficient" pasture,
- observed deficiency identified in animals.
A mineral deficiency has often been a while developing,
Animals that are growing [& milking] have higher needs for minerals and are also at a higher
risk to mineral deficiencies. These include:
Cattle on pasture can encounter excesses in elements like:
- rapidly growing young stock i.e. lambs / calves and in-calf heifers etc.
- ewes & cows in calf or milking
- rams & bulls also need extra zinc.
What to look out for in mineral deficiencies.
- Sodium / Chlorine
- Boron [especially very close to the sea]
Cattle on pasture can encounter deficiencies in major elements like:
In the trace elements deficiencies can include:
The information contained in this publication has been formulated in good faith, the contents do
not take into account all the factors which need to be considered before putting that information
into practice. Accordingly, no person should rely on anything contained herein as a substitute for
specific professional advice.
- occasionally Cobalt.
S.O.S. Rev 9.2 All rights reserved.
Contact: www.healthyag.com © Gwyn Jones 2001
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