Lactational response of dairy cows to oral administration of L-tyrosine.


Tyrosine was administered to lactating cows to determine if the lack of response to canola meal treated with formaldehyde could be due to failure to increase uptake of tyrosine. Disappearance of free tyrosine from nylon bags suspended in the rumen of a fistulated steer was 27.4% after 12 h. Oral administration of tyrosine to sheep increased the free… (More)


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