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Cinnagar supplementation of cattle grazing wheat or native pasture in northwest Oklahoma

S. A. Gunter, G. F. Combs Jr.
Proceedings Western Section American Society of Animal Science 2013 v.64 no. pp. 326-329
Artemisia filifolia, feed supplements, grazing, liveweight gain, minerals, monensin, nutrient intake, pastures, rangelands, steers, stocker cattle, winter wheat, Oklahoma
Two experiments were conducted to evaluate CinnaGar (Provimi; Trappes, France) and monensin (Ruminsen; Elanco Animal Health, Greenfield, IN) as supplements for grazing stocker cattle in northwest Oklahoma. In Exp. 1, twelve 2.2-ha pastures of winter wheat were grazed (1.2 steers/ha) with stocker steers (initial BW = 250 kg) starting March 3 for 70 d. Pastures were fertilized in early September with 56 kg of N/ha from urea. Free-choice minerals (Beef Minerals 3V6S; Vigortone Ag Products, Brooksville, OH) were provided to 6 pastures in ground-style mineral feeders, while the other pastures received a similar mineral (Beef Minerals 3V6SG, Vigortone Ag Products) except it contained 1,587 g/tonne of CinnaGar. In Exp. 2, 16 native pastures of sand sagebrush rangeland (between 4.1 and 8.2 ha each) were stocked (36 animal-unit-d/ha) with steers (initial BW = 254 kg) starting April 24 for 84 d. A base free-choice mineral (Beef Mineral 3V6S) was used and monensin and CinnaGar were added in a 2 x 2 factorial arrangement of treatments; 1) 0 and 0; 2) 1,761 and 0; 3) 0 and 2,351; and 4) 1,761 and 2,351 g/tonne of monensin and CinnaGar, respectively. In Exp. 1, mineral intake was 150 and 107 g/d for no CinnaGar and CinnaGar (P = 0.24), respectively. Also, ADG (overall avg = 1.4 kg) did differ (P = 0.66) between no CinnGar and CinnaGar; hence, ending BW (overall avg = 339 kg) or BW gain/ha (overall avg = 44 kg) did not differ (P > 0.52). In Exp. 2, mineral intake differed (P < 0.01) by treatment and was 79, 31, 68, and 43 g/d, respectively; the addition of monensin decreased mineral intake (P < 0.01), while CinnaGar did not affect mineral intake (P = 0.80). Further, ADG (overall avg = 0.65 kg) did not differ (P = 0.47) among treatments; hence, ending BW (overall avg = 305 kg) or BW gain/ha (overall avg = 41 kg) did not differ (P > 0.48). At these levels of CinnaGar intake and with these types of pasture, these supplements did not significantly affect animal performance.