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Dairy Cattle Grazing Preference among Six Cultivars of Perennial Ryegrass

^a Crop and Weed Ecol. Group, Dep. of Plant Sci., Wageningen Univ., P.O. Box 430, 6700 AK Wageningen, the Netherlands
^b Anim. Nutrition Group, Dep. of Anim. Sci., Wageningen Univ., P.O. Box 338, 6700 AH Wageningen, the Netherlands
^c Crop and Weed Ecol. Group, Dep. of Plant Sci., Wageningen Univ., P.O. Box 430, 6700 AK Wageningen, the Netherlands, and Dep. of Plant Prod., Faculty of Biosci. Eng., Univ. of Ghent, Coupure Links 653, 9000 Gent, Belgium

View larger version (21K): [in a new window]   Fig. 1. Setup of grazing experiments, with an example of the grazing area with the six cultivars offered during 1 d.

View larger version (16K): [in a new window]   Fig. 2. The relation among (A) ash, (B) neutral detergent fiber (NDF), (C) digestible organic matter (DOM), and (D) water soluble carbohydrates (WSC) expressed as index figure to preference of six cultivars (cv) in July (black), September (open symbols), and May (gray symbols).