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Regeneración natural en plantaciones puras y mixtas de especies nativas

by Montagnini, F; Guariguata, M; Ribeiro, N; Mariscal, A; CATIE, Turrialba (Costa Rica). Programa de Investigación; 4. Semana Científica Turrialba (Costa Rica) 6-9 Abr 1999.
Series: Serie Técnica. Reuniones Técnicas (CATIE).Publisher: Turrialba (Costa Rica) 1999Description: p. 324-327.ISBN: 9977573190.Subject(s): PLANTACION FORESTAL | ARBOLES FORESTALES | REGENERACION NATURAL | REHABILITACION DE TIERRAS | ESTACION EXPERIMENTAL LA SELVA | SARAPIQUI | HEREDIA | COSTA RICA | FOREST PLANTATIONS | FOREST TREES | NATURAL REGENERATION | RECLAMATION | COSTA RICA | PLANTATION FORESTIERE | ARBRE FORESTIER | REGENERATION NATURELLE | RECUPERATION DES SOLS | COSTA RICA In: Summary: We measured natural regeneration and understory light availability in two plantations in pure and mixed designs in the humid lowlands of Costa Rica. The plantations consisted of 8 native species: Plantations 1: Jacaranda copaia, Vochysia guatemalensis, Calophyllum brasiliense and Stryphnodendron microstachyum; Plantation 2: Terminalia amazonia, Dipteryx panamensis, Virola koschnyi and Albizia guachapele. In Plantation 1, at 3 and 7 years forest tree invasion was higher under V. guatemalensis, while shrubs were more abundant under J. copaia and under mixed-species treatments. In Plantation 2, at 5 years the mixed treatment had the highest number of herbaceous understory species, while D. panamensis had the highest understory biomass. At 7 year, V. koschnyi and T. amazonia had the highest number of woody species. Competition for grasses is a major factor influencing woody invasion under these plantations. High accumulation of litter on the plantation floor may contribute to diminish grass growth and thus encourage woody invasion under the species' canopies.
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We measured natural regeneration and understory light availability in two plantations in pure and mixed designs in the humid lowlands of Costa Rica. The plantations consisted of 8 native species: Plantations 1: Jacaranda copaia, Vochysia guatemalensis, Calophyllum brasiliense and Stryphnodendron microstachyum; Plantation 2: Terminalia amazonia, Dipteryx panamensis, Virola koschnyi and Albizia guachapele. In Plantation 1, at 3 and 7 years forest tree invasion was higher under V. guatemalensis, while shrubs were more abundant under J. copaia and under mixed-species treatments. In Plantation 2, at 5 years the mixed treatment had the highest number of herbaceous understory species, while D. panamensis had the highest understory biomass. At 7 year, V. koschnyi and T. amazonia had the highest number of woody species. Competition for grasses is a major factor influencing woody invasion under these plantations. High accumulation of litter on the plantation floor may contribute to diminish grass growth and thus encourage woody invasion under the species' canopies.

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