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Zootecnia Tropical
Instituto Nacional de Investigaciones Agrícolas Venezuela
ISSN: 0798-7269
Vol. 26, No. 3, 2008, pp. 183-186
Bioline Code: zt08024
Full paper language: Spanish
Document type: Research Article
Document available free of charge

Zootecnia Tropical, Vol. 26, No. 3, 2008, pp. 183-186

 en Evaluation of Hydric Recharge in Silvopastoral Systems in Livestock Landscapes
Ríos, Ney; Andrade, Hernán & Ibrahim, Muhammad

Abstract

The impact of silvopastoral systems on water resources in the recharge zone of sub-watershed of Jabonal river, Costa Rica, was evaluated. The evaluated systems were overgrazed native pasture (ONP), native pastures with trees (NPT), improved pastures with trees (IPT), and managed secondary forest (MSF). The vegetation of the evaluated systems was characterised and the runoff and infiltration were estimated. The ONP presented the highest runoff, followed by NPT, whereas IPT and MSF had the lowest values (28, 27, 15 y 7%, respectively). The MSF presented the highest infiltration, whereas pastures with trees (IPT and NPT) allowed higher infiltration rates than ONP (3.54, 0.23, 0.19 and 0.07 cm/h, respectively). The cover tree was negatively correlated with runoff (r = -0.71; P=0.01) and positively with infiltration (r = 0.75; P=0.01). The silvopastoral systems, which have tree components, showed better hydrological benefits in the recharge zone due to a decreased on the runoff and increased infiltration, causing a better conservation of water in soil.

Keywords
infiltration, plant cover, runoff, strata, structure.

 
 es Evaluación de la Recarga Hídrica en Sistemas Silvopastoriles en Paisajes Ganaderos
Ríos, Ney; Andrade, Hernán & Ibrahim, Muhammad

Resumen

Se evaluó el impacto de sistemas silvopastoriles sobre el recurso hídrico en zonas de recarga de la subcuenca del río Jabonal, Costa Rica. Los sistemas que se evaluaron fueron pasturas nativas sobrepastoreadas (PD), pasturas nativas con árboles (PNA), pasturas mejoradas con árboles (PMA) y un bosque secundario intervenido (BSI). Se caracterizó la vegetación de los sistemas evaluados y se estimó la escorrentía superficial e infiltración. La PD presentó la mayor escorrentía, seguida por la PNA; mientras que la PMA y el BSI presentaron los valores más bajos (28, 27, 15 y 7%, respectivamente). El BSI presentó la mayor infiltración; mientras que las pasturas con árboles (PMA y PNA) permitieron infiltrar más que las PD (3,54 0,23 0,19 y 0,07 cm/h, respectivamente). La cobertura arbórea se correlacionó negativamente con la escorrentía (r = -0,71; P=0,01) y positivamente con la infiltración (r = 0,75; P=0,01). Los sistemas silvopastoriles, al tener el componente arbóreo, mostraron mayores beneficios hidrológicos en la zona de recarga, ya que disminuyeron la escorrentía superficial e incrementaron la infiltración, favorecieron a una mayor conservación de agua en el suelo.

Palabras-clave
cobertura vegetal, escorrentía, estratos, estructura, infiltración.

 
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