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CRECIMIENTO DE ESPECIES FORESTALES NATIVAS EN LA ZONA NORTE DE COSTA RICA1

CRECIMIENTO DE ESPECIES FORESTALES NATIVAS EN LA ZONA NORTE DE COSTA RICA1,Adrián Delgado,Marcelino Montero,Olman Murillo,Marvin Castillo

CRECIMIENTO DE ESPECIES FORESTALES NATIVAS EN LA ZONA NORTE DE COSTA RICA1  
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Growth of native forest species in the north area de Costa Rica. The performance of 5 of the most frequently planted species in refor- estation in the humid lowlands of Costa Rica was evaluated. The study was developed based on a series of permanent plots from the Native Tree Species for the North Zone Project, of the Technological Institute of Costa Rica. The per- manent plots (8 to 11 years old) were established in the 90's in the 4 major climatic/soil strata in which the north zone of Costa Rica was subdi- vided. The behavior and growth (based on the dbh and total height) of plantations with the native tree species almendro (Dipteryx panamen- sis), pilón (Hyeronima alchorneoides), fruta dorada (Virola koschnyi), botarrama (Vochysia ferruginea), and cebo (Vochysia guatemalensis) were studied. Growth and increment analysis on the variables measured was made. Cebo planta- tions overgrew all other tree species, reaching a maximum dbh of 24.6 cm (11 years old) and a basal area of 29.2 m2 ha-1 (9 years old). Pilón and botarrama registered the best growth after cebo. Almendro was the tree species with the lowest growth in all variables, with 10.3 m2 ha-1 in basal area and a maximum dbh of 12.6 cm (11 years old). The highest growth values were registered
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