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Temporal and Vertical Distribution of Nonstructural Carbohydrate, Fiber, Protein, and Digestibility Levels in Orchardgrass Swards

^a Dep. of Plants, Soils, and Biometeorology, Utah State Univ., 4820 Old Main Hill, Logan, UT 84322-4820
^b USDA-ARS Northwest Irrigation and Soils Research Lab., Kimberly, ID 83341
^c USDA-ARS Plant Sci. Research Unit, Dep. of Crop Sci. and Dep. of Animal Sci., Box 7620, North Carolina State Univ., Raleigh, NC 27695-7620

View larger version (15K): [in this window] [in a new window]   Fig. 1. Orchardgrass TNC concentrations in sward horizons at 6-h intervals in (a) October 2000, (b) June 2001, and (c) August 2001. Mean height of each horizon layer is shown in the legend. Significance and LSD are shown for main or interactive effects of sampling time and horizon height.

View larger version (16K): [in this window] [in a new window]   Fig. 2. Orchardgrass CP concentrations in sward horizons at 6-h intervals in (a) October 2000, (b) June 2001, and (c) August 2001. Mean height of each horizon layer is shown in the legend. Significance and LSD are shown for main effects of sampling time and horizon height.

View larger version (17K): [in this window] [in a new window]   Fig. 3. Orchardgrass NDF concentrations in sward horizons at 6-h intervals in (a) October 2000, (b) June 2001, and (c) August 2001. Mean height of each horizon layer is shown in the legend. Significance and LSD are shown for main effects of sampling time and horizon height.

View larger version (16K): [in this window] [in a new window]   Fig. 4. Orchardgrass IVTDMD in sward horizons at 6-h intervals in (a) October 2000, (b) June 2001, and (c) August 2001. Mean height of each horizon layer is shown in the legend. Significance and LSD are shown for main effects of sampling time and horizon height.

View larger version (17K): [in this window] [in a new window]   Fig. 5. Orchardgrass NDF digestibility in sward horizons at 6-h intervals in (a) October 2000, (b) June 2001, and (c) August 2001. Mean height of each horizon layer is shown in the legend. Significance and LSD are shown for main effects of sampling time and horizon height.