Changes in carbon and inorganicnutrients after clear felling a rainforest in Malaysia and planting with Acaciamangium
Nykvist, N , and Sim, B.l. , (2009) Changes in carbon and inorganicnutrients after clear felling a rainforest in Malaysia and planting with Acaciamangium. Journal of Tropical Forest Science, 21 (2). pp. 98-112. ISSN 0128-1283 Official URL: http://info.frim.gov.my/cfdocs/infocenter/jtfsonline/jtfs/v21n2/98-112.pdf AffiliationsSweden. Skogsstigen Malaysia. Johor Bahru. Bukit Mewah AbstractThe amounts of organic C, and N, P, K, Ca and Mg in the biomass and soils were investigated in two catchments in Sabah, Malaysia, that had formerly supported a dipterocarp rainforest before it was clear felled and planted with Acacia mangium. Trees in one catchment (W4) were manually felled and extracted. Trees in the other (W5), were also manually felled but extracted with crawler tractors. The slash was burnt in W5 before planting, which is the normal practice in this area. During the 10-year rotation period of the plantations, 95 Mg of organic carbon ha-1 were lost from the soil in both W4 and W5, corresponding to about 80% of the soil carbon at planting. About 1390 and 1190 kg N ha-1 were lost from the soil in W4 and W5 during this period, corresponding to 26 and 22% respectively of the initial amounts of nitrogen in the soil before planting. The amounts of plant-available P and Mg in W4 and W5, and Ca in W5 increased in the soil, in spite of the high amounts of nutrients taken up by plants. The content of plant-available K declined, probably due to leaching. | Item Type: | Journal |
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| Additional Information: | The Swedish Agency for Research Cooperation with Developing Countries and Sabah Forest Industries Sdn. Bhd. (SFI) provided funding for this study. The authors are grateful to R Apin and F Dunong for biomass and soil sampling in 1987 and 1991, and to U Ilstedt for biomass sampling in 1997. Thanks are also due to the laboratory chief, O Emteryd, and the staff at Umeå, Mendolong and Sipitang. For valuable discussions in the field spanning many years, we are indebted to H Grip, A Malmer, U Ilstedt and KW Khiong. |
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| Keywords: | Burnt and unburnt catchments, losses of nutrients, 10-year-old plantations |
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| Subjects: | S Agriculture, Forestry |
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| ID Code: | 6497 |
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