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The Comparative Effects of Continual and Rotational Systems of Grazing on the Carotene Content of Permanent Pasture Herbage and of the Milk Produced Therefrom^*

Chemistry Department And Dairy Department, South Carolina Agricultural Experiment Station, Clemson College, Clemson

ABSTRACT

A study was made of the relation of continual and rotational systems of grazing to the carotene content of the herbage of improved Bermuda grass pastures and of the milk produced by respective groups of cows grazing thereon.

The system of grazing effected no marked and consistent difference in either the concentrations or the variations of the carotene in the herbage.

The carotene concentrations and fluctuations of the milk revealed no differences that could be ascribed to the system of grazing.

The quantitative changes in the carotene ingested were reflected in the carotene values of the milk during the spring and the fall when the concentrations in the milk were at a "subceiling" level, but this did not hold true during the summer, since the values of the milk apparently were at "ceiling" level.

^* Technical Publication No. 106. Published with the approval of the Director of the South Carolina Agricultural Experiment Station.

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