Resumo

PLAZA T., Guido Armando; QUINTANA V., Diego Nicolás; APONTE, Ligia Stella  e  CHAVES C., Bernardo. Characterization of the weed community of a rose greenhouse production system in the Bogota Plateau. Agron. colomb. [online]. 2009, vol.27, n.3, pp.385-394. ISSN 0120-9965.

The community of weeds associated to a rose crop grown under greenhouse conditions was recognized and characterized by means of supervised sampling, analyzing a series of population attributes such as density, coverage and frequency. These were assessed in two different planting modes (confined and elevated beds), and additionally on the external and internal edges of the greenhouses. Forty six species belonging to 41 genera, 23 families, 18 orders and three subclasses were identified. Diversity index (H) of the community was 1.9, whereas equity index was 0.497, indicating the dominance of a few species, namely Cardamine hirsuta (inside the greenhouses, mainly in the confined beds), and Pennisetum clandestinum (outside the greenhouses, mainly on the edges), which responded for 67% of the whole plant coverage. These were also the most abundant species. A clear difference was detected between the two planting modes, and between them and the edges.

Palavras-chave : richness; structure; diversity; Cardamine hirsuta.

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