Agronomic potential of Centrosema pubescens in well drained savannas of Anzoátegui state, Venezuela (Potencial agronómico de Centrosema pubescens en condiciones de sabana bien drenada del estado Anzoátegui, Venezuela)

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Zootecnia Tropical, ISSN: 0798-7269 Instituto Nacional de Investigaciones Agrícolas Venezuela Zootecnia Tropical, Vol. 21, No. 2, 2003, pp. 197-217

Agronomic potential of Centrosema pubescens in well drained savannas of Anzoátegui state, Venezuela Potencial agronómico de Centrosema pubescens en condiciones de sabana bien drenada del estado Anzoátegui, Venezuela Iraida Rodríguez1*, Adalberto Flores2 y Rainer Schultze-Kraft3 1 Instituto

Nacional de Investigaciones Agrícolas. Centro de Investigaciones Agrícolas del Estado Anzoátegui, Apartado Postal 212, El Tigre, Anzoátegui. *Correo-e: livicva@telcel. net.ve 2 AGROSSABANA, C.A., El Tigre, Anzoátegui 3 Universidad de Hohenheim, Stuttgart, Alemania Recibido: 21/02/03 Aceptado: 17/09/03 Code Number: zt03010 SUMMARY Centrosema pubescens is a widespread distributed forage legume in tropical America. It is considered intolerant to acid soils; however some accessions or similar species like Centrosema acutifolium can be tolerant. The purpose of this study was to evaluate both the adaptability and productivity of 23 accessions of C. pubescens to well drained savanna conditions, with acid and low natural fertility soils, of Venezuela. The experiment was conducted at the experimental station located in El Tigre, Anzoátegui State (8° 51’ N, 64° 12’W, and 265 masl. The accessions used in the experiment were collected in Brazil, Colombia, Panama, Dominican Republic, and Venezuela, obtaining the seeds from the International Center of Tropical Agriculture, CIAT, Colombia. A standardization cut was

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made 15 weeks after planting. Forage dry-matter production, rooting capacity, and stolon length were evaluated every 12 weeks, during two years. A randomized complete block design was used, using 27 treatments (accessions) and three replications. Twenty three accessions of C. pubescens selected for good performance in an infertile acid soil were tested along with two control lines consisting on two accessions of C. pubescens and C. acutifolium. Means were compared using the Duncan test (P