| Revista: | Acta botanica brasilica |
| Base de datos: | PERIÓDICA |
| Número de sistema: | 000271431 |
| ISSN: | 0102-3306 |
| Autores: | Ramos, Kennya Mara Oliveira1 Felfili, Jeanine Maria Fagg, Christopher William Sousa-Silva, Jose Carlos2 Franco, Augusto Cesar3 |
| Instituciones: | 1Universidade de Brasilia, Departamento de Engenharia Florestal, Brasilia, Distrito Federal. Brasil 2Empresa Brasileira de Pesquisa Agropecuaria, Cerrados, Planaltina, Distrito Federal. Brasil 3Universidade de Brasilia, Departamento de Botanica, Brasilia, Distrito Federal. Brasil |
| Año: | 2004 |
| Periodo: | Abr-Jun |
| Volumen: | 18 |
| Número: | 2 |
| Paginación: | 351-358 |
| País: | Brasil |
| Idioma: | Portugués |
| Tipo de documento: | Artículo |
| Enfoque: | Experimental, aplicado |
| Resumen en inglés | Amburana cearensis has a wide geographical distribution throughout the seasonal forests and transition zones forest/savanna (Cerrado) and forest/dry seasonal forests (Caatinga) in the North, Northeast and Central Brazil. It is under threat due to over exploitation of its valuable timber and the massive convertion of the forests into agricultural land. Little is known on the growth and biomass allocation of the seasonal forests species. The hypothesis is that those species show some degree of phenotipic plasticity due to the strong seasonal light gradient found under natural conditions, in addition to those variations usually found under the canopy. This study can contribute to a better understanding of the functioning of the seasonal forest ecosystems and also to the silviculture of this species. The objective of this work was to study the growth and biomass allocation of seedlings of A. cearensis under full sun and three shading levels, in nursery conditions. The shading levels averaged 0%, 50%, 70% and 90% of the full sunlight. The experimental design was randomized with 25 replicates per treatment. Height, stem base diameter, number of leaves and leaflets were monitored from four months till 16 months of age, and dry matter was analyzed at 19 months of age. Biomass accumulation was affected by the shading levels. The total biomass was higher under full sunlight (10,55g), followed by 50%, and 70% shading, while the lowest average was found under 90% (4,59g). Eighty percent of total biomass was found in the roots for the unshaded plants. This pattern of biomass partioning predominantly to roots occurred in all treatments. The initial development under nursery conditions indicates that this species could be introduced during the early stages of a program to reclaim degraded seasonal forests, as well as used in plantation trials |
| Disciplinas: | Biología |
| Palabras clave: | Angiospermas, Ecología, Fisiología vegetal, Reforestación, Crecimiento, Sombreado, Producción de biomasa, Amburana cearensis, Leguminosae |
| Keyword: | Biology, Angiosperms, Ecology, Plant physiology, Reforestation, Growth, Shading, Biomass production, Amburana cearensis, Leguminosae |
| Texto completo: | Texto completo (Ver HTML) |
