Evaluation of Selected Clones of Phalaris arundinacea L. I. In Vivo Digestibility and Intake1
- R. F. Barnes and
- G. O. Mott2
In vivo digestion and voluntary intake trials were conducted with sheep in digestion crates with selected clones of Phalaris arundinacea L. differing in palatability, as originally measured in cafeteria grazing trials with sheep. Palatable reed canarygrass clones were significantly greater in dry matter digestibility under ad libitum feeding than were unpalatable clones in three of four harvests studied. Dry matter digestibility, measured with intake restricted to 90% of ad libitum consumption, was significantly greater for palatable clones in only one harvest. Voluntary dry matter intake was also significantly greater for palatable clones in only one harvest.
Original dry matter, crude protein, cellulose, acid detergent fiber, acid detergent lignin, cell wall constituents, and mineral analyses showed no consistent relationship with palatability.
Alfalfa (Medicago saliva L.) and reed canarygrass showed very little difference in apparent digestion coefficients except for a lower digestion of cell wall constituents with alfalfa. Dry matter intake of alfalfa was consistently greater than that of reed canarygrass.Please view the pdf by using the Full Text (PDF) link under 'View' to the left.
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