J. Anim Sci.
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J. Anim Sci. 1976. 42:554-559.
© 1976 American Society of Animal Science
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Evaluation of a New Variety of Orchardgrass for Cattle

H. T. Bryant1, R. C. Hammes, Jr.1, R. E. Blaser1 and J. P. Fontenot2

Virginia Polytechnic Institute and State University, Blacksburg 24061

Abstract

Experiments were conducted over a 2-year period to evaluate the yield, chemical composition, digestibility and intake of a late maturing orchardgrass (Dactylis glomerata L.) variety ‘Jackson’ recently released in Virginia. There was no significant difference during 2 years in total seasonal yield of Jackson and Virginia 70, an early maturing variety. During the second harvest year, the yield at first harvest was significantly larger from the early maturing varieties, Virginia 70 and Potomac than from the late maturing variety, Jackson.

The crude protein, ether extract, crude fiber and nitrogen-free extract of the late maturing Jackson and the early maturing Virginia 70, were not significantly different. The digestion coefficients for crude protein, ether extract, crude fiber and dry matter were not significantly different for the two orchardgrass varieties; however, the digestion coefficient for the nitrogen-free extract was higher (P<.05) for the late maturing Jackson compared to the early maturing Virginia 70 orchardgrass. The intake by steers of the early maturing Virginia 70 orchardgrass, seed heads out of boot, was 82% of that of the late maturing Jackson orchardgrass, seed heads in boot, when restricted to one variety and 13% of Jackson when the steers had the choice of either variety fed as hay.

Footnotes

1 Department of Agronomy.

2 Department of Animal Science.






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Copyright © 1976 by the American Society of Animal Science.