Date of Award:
5-1969
Document Type:
Thesis
Degree Name:
Master of Science (MS)
Department:
Wildland Resources
Department name when degree awarded
Range Science
Committee Chair(s)
Jack F. Hooper
Committee
Jack F. Hooper
Committee
J. B. Grumbles
Committee
John E. Butcher
Abstract
A comparative index to digestible nutrients was established for Russian wildrye, crested wheatgrass, and intermediate wheatgrass seeded on foothill areas of Utah. The nutritive values of these grasses were compared by the lignin ratio method, the chlorophyllan ratio method, and the in vivo rumen bag process.
Average digestion coefficients computed by the lignin ratio method for dry matter, ether extract, cellulose, and gross energy were highest for intermediate wheatgrass. Protein was more digestible for Russian wildrye. Digestible energy was adequate in all species to meet requirements for late lactation.
Results from the chlorophyllan ratio method were excessively high and were not considered valid.
Dry matter loss of Russian wildrye was greater than losses from either of the wheatgrasses.
Losses of dry matter due to 24-hour in vivo rumen fermentation and rinsing only of nylon bags were closely correlated.
Checksum
5605f512db0f18aa5ce6ab2a641edc05
Recommended Citation
Mitchell, George W., "Nutritive Values of Russian Wildrye, Crested Wheatgrass, and Intermediate Wheatgrass Grazed by Cattle on Utah Foothill Ranges" (1969). All Graduate Theses and Dissertations, Spring 1920 to Summer 2023. 2897.
https://digitalcommons.usu.edu/etd/2897
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