Data/hora: 02/06/2024 04:34:08

Provedor de dados: | Anais da Academia Brasileira de Ciências
País: | Brazil
Título: | Ground level photosynthetically active radiation dynamics in stands of Acacia mearnsii De Wild
Autores: | PÉLLICO NETTO,SYLVIO; SANQUETTA,CARLOS R.; CARON,BRAULIO O.; BEHLING,ALEXANDRE; SIMON,AUGUSTO A.; CORTE,ANA PAULA D.; BAMBERG,ROGÉRIO.
Data: | 2015-09-01
Ano: | 2015
Palavras-chave: | Burr function; Light intensity; Probabilistic models; Temporal variation.
Resumo: | ABSTRACTThe objective is to study the dynamics of photosynthetic radiation reaching the soil surface in stands of Acacia mearnsii De Wild and its influence on height growth in stands. This fact gives rise to the formulation of the following hypothesis for this study: "The reduction of the incidence of light inside the stand of black wattle will cause the inflection point in its height growth when this reaches 4 to 5 m in height, i.e. when the stand is between 2 and 3 years of age". The study was conducted in stands in the state of Rio Grande do Sul, Brazil, where diameters at breast height, total height and photosynthetically active radiation available at ground level were measured. The frequency tended to be more intense when the age of the stands increases. It was evident that a reduction of light incidence inside the forest occurred, caused by canopy closure. Consequently, closed canopy propitiated the competition of plants. This has affected the conditions for growth in diameter and height of this species, reason why it becomes possible to conceive the occurrence of an inflection point in the growth of these two variables, confirming the formulated hypothesis.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000401833
Editor: | Academia Brasileira de Ciências
Relação: | 10.1590/0001-3765201520140080
Formato: | text/html
Fonte: | Anais da Academia Brasileira de Ciências  v.87 n.3 2015
Fonte: | info:eu-repo/semantics/openAccess