Beta-carotene and vitamin A content in feeds for calves
1992
Iwanska, S. | Pysera, B. | Rybicka, M. (Akademia Rolniczo-Techniczna, Olsztyn (Poland))
Studies on changes in beta-carotene and vitamin A content in colostrum, milk replacers (Mlekopan H), concentrate feeds (CJ) and hay in relation to season were carried out. The significant low content of beta-carotene and vitamin A (did not meet the requirement) in those feeds during the winter and early spring was stated
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