Acacia mangium, a Nurse Tree Candidate for Reforestation on Degraded Sandy Soils in the Malay Peninsula
Abstract:We investigated the suitability of Acacia mangiumWilld., a fast-growing tropical leguminous tree, as a nurse tree for reforestation with indigenous species on severely degraded sandy soils in southern Thailand. Planting A. mangium yielded a survival rate of 91% and satisfactory growth (7.7 m height, 56 mm dbh, 59 Mg dry weight ha−1 aboveground biomass) 45 months after planting, indicating the species' suitability for reforestation. Three dipterocarp species (Dipterocarpus alatus Roxb. ex G. Don, Hopea odorata Roxb., and Shorea roxburghii G. Don.) planted simultaneously with A. mangium showed better growth than when planted alone. Seedlings of all three dipterocarp species that survived transplanting showed better survival when planted with A. mangium. The findings suggest A. mangium is an effective nurse tree for dipterocarp seedlings. The carbon and nitrogen contents of surface soil did not increase in the A. mangium stands. Microclimate measurements showed moderated air temperature, relative humidity, and soil temperature in the mixed planting. The moderated microclimate under the A. mangium canopy is thought to be responsible for the improved growth of the dipterocarp seedlings. If dipterocarp seedlings are planted after A. mangium grows enough to provide shade, initial survival rates should improve. FOR. SCI. 51(5):498–510.
Keywords: Dipterocarps; environmental management; forest; forest management; forest resources; forestry; forestry research; forestry science; microclimate; mixed planting; natural resource management; natural resources; soil temperature; southern Thailand
Document Type: Regular Article
Affiliations: 1: Asian Natural Environmental Science Center The University of Tokyo Tokyo Japan 113-8657, Fax: +81-3-5841-2785, Email: firstname.lastname@example.org 2: Tohoku Research Center Forestry and Forest Products Research Institute Iwate Japan 020-0123, Email: email@example.com 3: Yamanashi Prefecture Yamanashi Japan 400-8501, Email: firstname.lastname@example.org 4: Asian Natural Environmental Science Center The University of Tokyo Tokyo Japan 113-8657, Email: email@example.com 5: Graduate School of Agricultural and Life Sciences The University of Tokyo Tokyo Japan 113-8657, Email: firstname.lastname@example.org 6: Graduate School of Agricultural and Life Sciences The University of Tokyo Tokyo Japan 113-8657, Email: email@example.com 7: Faculty of Bioresources Mie University Mie Japan 514-8507, Email: firstname.lastname@example.org 8: Phikul Thong Forest Research Station, Royal Forest Department Narathiwat Thailand 96120, Email: email@example.com 9: College of Bioresource Sciences Nihon University Kanagawa Japan 252-8510 10: Asian Natural Environmental Science Center The University of Tokyo Tokyo Japan 113-8657, Email: firstname.lastname@example.org
Publication date: October 1, 2005
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