AbstractsChemistry
Studies on the problem of improving the vitamin A value of winter produced milk. : Part I. A comparison of the composition of pasture herbage and green cut cereals ; Part II. The carotene and vitamin A content of milk produced during the winter.
| Institution: | McGill University |
|---|---|
| Department: | Department of Agricultural Chemistry. |
| Degree: | MS. |
| Year: | 1938 |
| Keywords: | Agricultural Chemistry. |
| Record ID: | 1525578 |
| Full text PDF: | http://digitool.library.mcgill.ca/thesisfile132158.pdf |
Abstract
[...]In order to have carotene present in the winter ration of dairy cows, it is necessary to cure the green herbage in such a way that the carotene will be preserved and not destroyed during the curing process. Sun curing results in a loss of carotene. The carotene present in the cured herbageis very unstable and decreases rapidly in storage, so that during the late winter months or stall-feeding, the ration may be practically devoid of carotene. Most observations in this connection have been made in countries where the stall-feeding period is shorter than in Canada. Similarstudies have not been made under Quebec conditions. [...]A study has been made of the carotene and Vitamin A content of milk produced by cows, fed under ordinary conditions of stall-reeding. Such a study was necessary in order to arrive at a conclusion regarding the need of a green supplement in the dairy ration.
