Effects of soil properties on growth of young tree seedlings of Hopea odorata and Azadirachta excelsa in line and gap enrichment planting in logged-over tropical lowland forest were evaluated. At 13 months, the trees were grouped into good and poor growth based on their height increment in the previous 6 months. Organic matter content, penetration resistance, soil texture, thickness of A-horizon, Ca and Mg contents differed significantly between soils with good and poor growth. Organic matter, thickness of A-horizon, Ca and Mg contents were found to be significantly higher in good growth soils than poor ones, but penetration resistance was the reverse. Surface soils under good growth had lower clay content and higher sand content compared to that under poor growth. Favourable soil conditions for good growth were also manifested in biomass and litter accumulation. The mean dry biomass in the good and poor growth was 174 and 72 g m-2 respectively, and for dry litter 300 and 154 g m-2 respectively. Properties most limiting seedling growth performance were bulk density (mechanical resistance), depth of A-horizon and amount of clay in the surface soil. Correction of these factors is therefore important in ensuring the success of rehabilitation and reforestation of logged-over degraded forest.
Topic: soil properties,growth,seedlings,tropical forests,lowland areas,logging effects,Hopea odorata,Azadirachta,conferences
Geographic: Malaysia,Peninsular Malaysia
Publisher: CIFOR, Bogor, Indonesia
Publication Year: 2001
Source: S. Kobayashi, J.W. Turnbull, T. Toma, T. Mori, N.M.N.A. Majid (eds.) Rehabilitation of degraded tropical forest ecosystems: workshop proceedings, 2-4 November 1999, Bogor, Indonesia. 129-134Creative Commons Attribution 4.0 International License.