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‘Florigraze’ and ‘Arbrook’ Rhizoma Peanut as Pasture for Growing Holstein Heifers

^a Colegio de Postgraduados, Montecillo, Texcoco, Edo de México, Mexico CP56230
^b P.O. Box 110300, Univ. of Florida, Gainesville, FL 32611-0300
^c P.O. Box 110920, Univ. of Florida, Gainesville, FL 32611-0920
^d ESALQ, Univ. de São Paulo, Piracicaba, SP, 13418-900, Brazil

View larger version (14K): [in a new window]   Fig. 1. Average herbage mass (HM) on continuously stocked pastures of Florigraze and Arbrook rhizoma peanut across 3 yr of grazing. Arbrook HM was greater than Florigraze in May (P < 0.01; SE = 240), but there were no cultivar differences in HM in June (P = 0.45; SE = 130), July (P = 0.76; SE = 140), August (P = 0.81; SE = 150), September (P = 0.71; SE = 160), or October (P = 0.45; SE = 150). DM = dry matter.

View larger version (13K): [in a new window]   Fig. 2. Average herbage allowance (HA; kg of forage kg–1 of animal live weight) on continuously stocked pastures of Florigraze and Arbrook rhizoma peanut across 3 yr of grazing. There were no differences between cultivars in any month (P > 0.23; SE = 0.11–0.23).

View larger version (14K): [in a new window]   Fig. 3. Average crude protein of hand-plucked herbage from continuously stocked pastures of Florigraze and Arbrook rhizoma peanut across 3 yr of grazing. There was no cultivar effect in May (P = 0.34; SE = 11), but Florigraze crude protein was greater than Arbrook in June (P = 0.10; SE = 6), July (P = 0.04; SE = 5), August (P = 0.03; SE = 6), September (P = 0.04; SE = 6), and October (P = 0.01; SE = 7).

View larger version (13K): [in a new window]   Fig. 4. Average in vitro organic matter digestibility (IVOMD) of hand-plucked herbage from continuously stocked pastures of Florigraze and Arbrook rhizoma peanut across 3 yr of grazing. There was no cultivar effect in May (P = 0.48; SE = 20), but Florigraze IVOMD was greater than Arbrook in June (P < 0.01; SE = 11), July (P < 0.01; SE = 12), August (P < 0.01; SE = 10), and October (P = 0.09; SE = 13), and tended to be greater in September (P = 0.14; SE = 12).