Interference of weeds on seedlings of four neotropical tree species
Open Access
- 4 May 2015
- journal article
- research article
- Published by Universidade Estadual de Maringa in Acta Scientiarum. Agronomy
- Vol. 37 (2), 219-232
- https://doi.org/10.4025/actasciagron.v37i2.19280
Abstract
Seasonal semideciduous forests in southeastern Brazil have experienced intensive fragmentation, and the interference of weeds may affect the dynamics of restored communities. The purpose of this study was to determine if there were specific densities of the weeds Urochloa decumbens and Ipomoea grandifolia at which the growth of seedlings of four Neotropical tree species – Senegalia polyphylla and Enterolobium contortisiliquum (Fabaceae) and Ceiba speciosa and Luehea divaricata (Malvaceae) – would be negatively affected. A randomized experimental design was conducted in a greenhouse, with five treatments to each tree species (different weed densities per pot per tree species) and four replicates per treatment. After the weeds flowered, the height and stem diameter of seedlings were quantified, including the aboveground dry biomass and the percentages of macro and micronutrients contents in the leaves. The growth of the tree seedlings was affected by the lowest weed density (two weeds per pot) when interacting with U. decumbens or I. grandifolia. In general, significant decreases in the percentage of macro and micronutrients in the leaves were observed, especially at eight weeds/pot. Such results could warrant experimental practices in chemical control in conjunction with alternative methods to control of these two weeds in restored areas.Keywords
This publication has 18 references indexed in Scilit:
- Effects of roads, topography, and land use on forest cover dynamics in the Brazilian Atlantic ForestForest Ecology and Management, 2010
- Selective logging and fire as drivers of alien grass invasion in a Bolivian tropical dry forestForest Ecology and Management, 2009
- On the restoration of high diversity forests: 30 years of experience in the Brazilian Atlantic ForestBiological Conservation, 2009
- Forest structure in a mosaic of rainforest sites: The effect of fragmentation and recovery after clear cutForest Ecology and Management, 2009
- Restoring rainforest species by direct seeding: Tree seedling establishment and growth performance on degraded land in the wet tropics of AustraliaForest Ecology and Management, 2008
- The need for full inventories of tree modes of disturbance to improve forest dynamics comprehension: An example from a semideciduous forest in BrazilForest Ecology and Management, 2008
- Efficacy of graminicides on grass weed species of forestryCrop Protection, 2006
- Tree Recruitment from On-site Versus Off-site Propagule Sources During Tropical Forest SuccessionNew Forests, 2006
- Riparian forest restoration: why each site needs an ecological prescriptionForest Ecology and Management, 2004
- Restoration of seasonal semideciduous forests in Brazil: influence of age and restoration design on forest structureForest Ecology and Management, 2004