Produção Nacional
Revisado por pares
Influência da idade e do ambiente na relação entre a massa de folhas e a área foliar de acácia-negra (Acacia mearnsii De Wild.)
2016; UNIVERSIDADE FEDERAL DO RIO GRANDE DO SUL; Volume: 14; Issue: 3 Linguagem: Inglês
ISSN
1679-2343
AutoresAlexandre Behling, Carlos Roberto Sanquetta, Ana Paula Dalla Côrte, Sergio Junior Costa, Jonathan William Trautenmüller,
Tópico(s)Remote Sensing in Agriculture
ResumoThe larger the exposed leaf area, the higher are the amount of photosynthates and dry matter. Since leaf area is an indicative of production, it can be used to model the forest canopy even considering the difficulty of modeling such variable. We aimed to analyze the relationship between leaf dry mass and leaf area in black-wattle plantations throughout its cultivation cycle at different locations. For that, the area and dry mass of leaves were measured in 1-, 3-, 5-, and 7-year-old commercial plantations of black-wattle in Cristal and Piratini municipalities, Rio Grande do Sul state, Southern Brazil. Three 9 x 14 m plots were established on each plantation. Plants were measured for their circumference at breast height (1.3 m aboveground) and two trees having the two mean values at each plot were selected for determination of leaf biomass and area. In order to measure leaf area, three 50-g samples were taken along the entire crown of each tree. Fitting statistics and the evaluation of the models we used indicated that the relationship between leaf area and leaf dry mass is not influenced by the planting site, but rather by plantation age. Moreover, the analyses also showed that leaf dry mass can be used to estimate leaf area, since the correlation between these variables is very strong.
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