1993, Number 2
Evaluation of “Estrella Santo Domingo” grass ( Cynodon nlemfuensis) and Brachiaria (Brachiaria radicans) in the production of beef in the humid tropics
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ABSTRACTAn experiment. was conducted to evaluate weight gains per steer using two pastures: Santo Domingo Stargrass (Cynodon nlemfuensis) stocked at 1.7 (treatment 1 = T-1) and 2.5 (T-2) animal units (A.U.)/ha and Tannergrass (Brachiaria radicans) with 2.0 A.U./ha (T-3). The study was conducted in a location with a humid climate with rains all year long (23.OC annual temperature, 1980 mm rainfall and ultisol soils: silicic clay to clay loam with pH from 4.2 to 5.1). The experiment began in March 1986 and ended in May 1987. Pasture lots were rotationally grazed with grazing and recovery periods of 14 and 28 days, respectively. Fertilization consisted of 60 kg P/ha applied once a year in February and 100 kg N/ha divided in three equal dres sings of urea through the year (February, August and October). Twenty nine 3/4 Holstein x Zebu steers with an initial weight of 171.3 kg and a 12 month age were used. The steers received mineralized salt ad libitum and were weighed every 28 days prior fasting of 12-14 hours. Average daily gains were 0.676, 0.606 and 0.558 kg/animal/day for treatments T-1, T-2 and T-3, respectively and were not statistically different (P ›0.05). Liveweight gains were 687.4, 977.0 and 709.0 kg. It is concluded that the Stargrass pasture stocked at 2.5 A.U./ha is the most viable alternative to intensify beef production in the agroecological situation represented by the experimental site.
Meléndez, N.F., Pérez., P.J. y González, M.J.: Respuesta a la fertilización nitrogenada sobre la producción de carne y capacidad de carga del pasto Estrella de Africa (Cynodon plectostachyus) en los suelos de la Chontalpa, Tabasco. Boletín 1980. Colegio Superior de Agricultura Tropical, Cárdenas, Tabasco, 1980.