Selenium in Crops in the United States in Relation to Selenium-Responsive Diseases of Animals
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TLDR
This report presents a map of the U. S. showing areas where the Se content of plants is adequate to protect animals from WMD, and areas where low levels of Se in plants may lead to Se-responsive diseases in animals, and describes how it was prepared.Abstract:
Selenium-responsive diseases of livestock occur frequently
in the United States and have been responsible
for serious economic losses. White muscle disease
(WMD) of lambs and calves is perhaps the most common
of these disorders. The occurrence of WMD is
related to the geologic nature of the soil parent material
(19). There is also evidence that regional patterns of
occurrence of WMD are related to regional differences in
the Se concentration of feed crops (3).
In the U. S., there are also areas where Se toxicity
has been evident in livestock. These areas have been
studied extensively, and the distribution of geologic
formations that form soils capable of producing high-Se
plants has been established (14, 17, 21).
This report presents a map of the U. S. showing
areas where the Se content of plants is adequate to
protect animals from WMD, and areas where low levels
of Se in plants may lead to Se-responsive diseases in
animals, and describes how it was prepared. A similar
survey of plant Se levels has been reported from western
Australia (9).read more
Citations
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