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Grasses and Alfalfa for Annual Forage and Pasture in South Central Alaska¹

Alaska Agricultural Experiment Station, Palmer

ABSTRACT

Four grasses: common ryegrass (predominantly Lolium multiflorum), orchardgrass (Dactylis glomerata), timothy (Phleum pratense), and tall oat-grass (Arrhenatherum elatius) were sown both in pure stands and in association with alfalfa (Medicago sativa) in 1961 and 1962. They were managed as annual forage crops and compared for herbage production and palatability to grazing dairy cows.

Ryegrass, either alone or with alfalfa, was superior in yield (P < 0.01), with alfalfa contributing little to the mixture. Yields were not significantly different (P < 0.01) from ryegrass-alfalfa and orchardgrass-alfalfa in 1961. Production from the other plots, including orchardgrass-alfalfa, was statistically homogeneous (P < 0.01).

Tall oatgrass ranked highest in palatability in 1961 (P < 0.01). Ryegrass was least palatable, with considerable statistical homogeneity among treatments ranking below tall oatgrass. In 1962, however, ryegrass was comparatively acceptable and no statistical differences among treatments were noted.

¹ Research supported in part by the tropical and subarctic Research Programs, Crops Research Division, ARS, USDA.