|
|||||
|
|
Artificially regenerating longleaf pine in canopy gaps: initial survival and growth during a year of drought |
|
| Authors: | Dante Arturo Rodríguez-Trejo Mary L Duryea Timothy L White Jeff R English John McGuire |
| Institution: | a División de Ciencias Forestales y del Ambiente, Universidad Autónoma Chapingo, Chapingo, Edo. de México, C.P. 56230, km 38.5 Carretera, Texcoco, Mexico, Mexico b Institute of Food and Agricultural Sciences, University of Florida, P.O. Box 110200, Gainesville, FL 32611-0200, USA c School of Forest Resources and Conservation, University of Florida, 367 Newins-Ziegler Hall, P.O. Box 110410, Gainesville, FL 32611-0410, USA d Joseph W. Jones Ecological Research Center, Newton, GA 31770, USA |
| Abstract: | Nitrogen fertilization in the nursery, along with altering the configuration of forest gaps, may improve the reforestation success of longleaf pine seedlings. During the very droughty 1998 growing season in Florida and Georgia, survival was higher under the forest canopy than in small (0.10 ha, 36 m diameter) and large (1.6 ha, 144 m diameter) canopy gaps. In the large gaps, survival of containerized seedlings was higher along the edges, particularly the SW edge. Shade from adult trees and the nurse effect of shrubs increased survival, while grass competition reduced survival. During dry years part of the “exclusionary zone” along the edge of canopy gaps (SW sector) may serve as a “survival zone”, at least in the short term. A model using oval-shaped gaps oriented from NW to SE, with an area of 0.25 ha is proposed to maximize the survival and growth of artificially regenerated longleaf pine seedlings. |
| Keywords: | Pinus palustris Disturbances Exclusionary zone Nitrogen Fertilization Restoration |
| 本文献已被 ScienceDirect 等数据库收录！ | |