Abstract
1. Effect of β-carotene supplementation to prepartum Holstein cows on colostrum quality and calf performance K.M. Aragona, E.M. Rice, M. Engstrom, P.S. Erickson Journal of Dairy Science CrossRef
Highlights
Healthy food has attracted much attention, and many researchers have devoted studies on improving the value of milk by effectively transferring nutrients to milk from feed
The objectives of this study were: 1. to observe the effect of β-carotene on selected rumen fermentation indicators, 2. to estimate whether β-carotene at a high concentration (500 mg/l) was safe for rumen microorganisms, and 3. to validate that β-carotene can stimulate the growth of rumen bacteria
Some studies reported that β-carotene plus α-tocopherol enhanced bacterial cell yield in the presence of safflower oil, caprate, stearate, or linoleate in incubation in vitro, suggesting that β-carotene and α-tocopherol increase the utilization of fatty acids. β-carotene plus α-tocopherol stimulated cellulose digestion in the presence of 100 mg/l of safflower oil, through the increased growth of cellulolytic bacteria
Summary
Healthy food has attracted much attention, and many researchers have devoted studies on improving the value of milk by effectively transferring nutrients to milk from feed. It has been shown that carotenoids can be transferred to milk from feedstuff. Despite the large variety of carotenoids in plants, no more than 10 are found in ruminant feeds, and the most quantitatively important are β-carotene and lutein. Since the β-carotene content in feedstuff is limited, adding commercial products is effective. Little attention has been paid to the effect of β-carotene on rumen fermentation and its disappearance in the rumen. The first event in the digestive process of carotenoids is degradation of the vegetable matrix that releases carotenoids into the rumen liquid phase (Mora et al, 1999). The extent of carotenoid degradation by microorganisms
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