Data/hora: 05/06/2024 18:30:37

Biblioteca(s): | Embrapa Meio-Norte.
Data corrente: | 21/06/1999
Data da última atualização: | 21/06/1999
Autoria: | CHEN, J. M.; BLACK, T. A.
Título: | Measuring leaf area index of plant canopies with branch architecture.
Ano de publicação: | 1991
Fonte/Imprenta: | Agricultural and Forest Meteorology, v.57, p.1-12, 1991.
Idioma: | Inglês
Conteúdo: | Radiation transmission through plant canopies is shown to be determined not only by the geometry of the foliage elements, but also by the geometry of foliage clumps. When the geometry of tree branches was considered with a Poisson model, it was found that beam transmission measurements at a 62o rather than a 57.5o incident angle can provide a good estimate of the effective leaf area index (La). The values of La calculated from the model were approximately 55-65% of the actual leaf area index when the branches were assumed to consist of one layer of randomly dispersed leaves. The claculated results are consistent with experimental data obtained from a Douglas-fir forest stand, which was largely composed of near-horizontal branchers.
Palavras-Chave: | IAF; Measuring leaf.
Thesagro: | Área Foliar; Medição.
Categoria do assunto: | --
Registro original: | Embrapa Meio-Norte (CPAMN)
Exemplares: | CPAMN - (6724-1) - ADD - SP - -- - S 11087 -  - S 11087 - DIS