SciELO - Scientific Electronic Library Online

 
vol.43 número11Glifosato aplicado com diferentes concentrações de uréia ou sulfato de amônio para dessecação de plantas daninhasControle genético da produção de grão e da eficiência de uso do nitrogênio em milho tropical índice de autoresíndice de assuntospesquisa de artigos
Home Pagelista alfabética de periódicos  

Serviços Personalizados

Journal

Artigo

Indicadores

Links relacionados

Compartilhar


Pesquisa Agropecuária Brasileira

versão impressa ISSN 0100-204Xversão On-line ISSN 1678-3921

Resumo

TONINI, Helio; KAMINSKI, Paulo Emilio  e  COSTA, Patricia da. Relationship of Brazil-nut seed yield to crown morphometric characteristics and competition indexes. Pesq. agropec. bras. [online]. 2008, vol.43, n.11, pp.1509-1816. ISSN 1678-3921.  https://doi.org/10.1590/S0100-204X2008001100009.

The aim of this work was to evaluate the relationship of seed yield of Brazil-nut native trees to crown morphometric characteristics and competition indexes. The data were collected in 88 sample trees, in natural forests in the South of Roraima State, Brazil, regarding different productivity classes. In each tree, the dendrometric variables, the indexes of morphometry and competition (distance dependent and independent) were measured. The relationships between crown morphometric variables and competition indexes to seed yield were obtained through the Spearman correlation coefficient and Kruskal-Wallis and Mann-Whitney tests. A linear regression analysis, through the stepwise procedure, was used to infer crown relations among morphometric variables and the diameter at breast height. The most productive trees were those with upper canopy positions, wich showed well-formed and longer crowns, and smaller height/diameter relationships. Competition showed nonsignificant effect on seed yield, in adult trees that start to produce fruits only after reaching the upper canopy positions.

Palavras-chave : Bertholletia excelsa; Brazil; Amazon; Roraima; forest product.

        · resumo em Português     · texto em Português     · Português ( pdf )

 

Creative Commons License Todo o conteúdo deste periódico, exceto onde está identificado, está licenciado sob uma Licença Creative Commons