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Vitamin a Content of Pasture Plants

11. Timothy (Phleum Pratense L.) and Red Top (Agrostis Alba L.) under Pasture Conditions and Fed Green^*

Idaho Agricultural Experiment Station, Moscow, Idaho

ABSTRACT

Conclusions: Results of this study indicate that the vitamin A activity of the two pasture plants, timothy (Phleum Pratense L.) and red top (Agrostis alba L.), was 220 ± 13 and 308 ± 10 rat units respectively, considering a gain of 12 grams in 4 weeks as representing one unit. Statistically, this is a significant difference. Compared with white clover (242 ± 19 units) and Kentucky bluegrass (175 ± 11 units) previously reported, timothy would rank between them while red top contained a third more units than even white clover. The content of vitamin A activity in these pasture plants is higher than has been reported for any feeds or foods.

^* Published with the approval of the Director as Research Paper No. 136, of the Idaho Agricultural Experiment Station.