The Use of Vitamin A Supplements for Sheep
نویسنده
چکیده
THE sheep population of Australia now exceeds 130 million, spread over the greater part of the Commonwealth and grazing under a wide variety of climatic and nutritional conditions. In some areas, sheep may have to exist for long periods on dry native pastures or be fed supplementary rations, both of which can be low in carotene, the precursor of Vitamin A. In these circumstances, it is possible that the body reserves of vitamin A may become so depleted as to limit production.
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تاریخ انتشار 1999