Abstract

RENGIFO, Zulay; ESPINOZA, Freddy; ROMERO, Eva  and  DIAZ, Yris. Botanical comparison of two deciduous forest in the municipality of San José de Guaribe, Guárico state, Venezuela. Zootecnia Trop. [online]. 2008, vol.26, n.3, pp.207-210. ISSN 0798-7269.

The objective of this study was to evaluate the botanical composition of two forests in dual purpose ranchs located at Northeastern of the Guárico state, Venezuela. The average annual temperature of the area is 26.9ºC, with annual precipitation ranging from 924 to 1,423 mm/yr, and seven dry months (november to may), strongly acidic soils, and low fertility. The evaluation of forests were realized with three transects of 250 m each with a minimum separation of 50 m between them. In each transect there was located an area of 10 x 10 m. The species were identified and calculated the relative importance value (RIV). The results showed that the forest in farm A consisted of 26 species, outstanding the families Leguminosae (37%), Boraginaceae (18%), and Bignoniaceae (14%), with 50% of RIV was covered by the species Tubebuia chrysantha, Acacia glomerosa, Arabiadaea brachypoda, Cordia sp., and Guazuma ulmifolia. Also, 26 species were found in farm B where the Leguminoseae family predominated with 34%, followed by Boraginaceae (20%), and Bignoniaceae (17%), with 50% of RIV covered by the species Acacia macracantha, Cordia thaisiana, Bourreria cumanensis, Tubebuia chrysantha, Acacia glomerosa, and Guazuma ulmifolia. From all species identified in two farms, at least 30% of them have forage value.

Keywords : botanical composition; RIV; legumes; tropical deciduous forest.

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