Forest soils under alternatives to slash-and-burn agriculture in Sumatra, Indonesia
A global project on ‘Alternatives to Slash and Burn’ agriculture was initiated by a consortium of international and national research institutes to facilitate intensification of the use of converted forest land, in order to help alleviate poverty and protect the remaining forest areas for their biodiversity values and their role in mitigating greenhouse gas emissions.
Data for the Indonesian benchmark areas in the lowland peneplain, piedmont and mountain zone of Sumatra are presented. A significant amount of forest land, especially in the lowland peneplain, has been converted in the last ten years into agricultural use, usually following logging concessions. Soils on the peneplain are poor (oxi- and ultisols) and current intensive crop based production systems are not sustainable. In the piedmont zone on better soils (inceptisols), rubber agroforests (still) characterize the area. Agroforests have emerged during the 20’th century as the major alternative to slash-and-burn agriculture, based on a shift of emphasis from food crops to cash-earning tree crops. Emphasis on food crops, however, continues in government resettlement schemes.
Differences in organic C content of the topsoil between forests and crop land are about 0.5% C, with agroforests and tree crop plantations in an intermediate position. A new size-density fractionation scheme for soil organic matter demonstrated larger changes in light and intermediate fractions. Forest soils can be significant sinks for methane and thus partly compensate for the methane emissions in lowland rice production.
Overall, the Sumatra benchmark areas demonstrate the need to combine intensification of land use at the field/household level with effective protection of remaining forest areas at the community level and reducing other driving forces of deforestation at the national level.
KeywordsSoil Organic Matter Forest Soil Humid Tropic Land Clearing Forest Conversion
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- Alegre, J. C. and Cassel, D. K., 1996. Dynamics of soil physical properties under alternatives to slash-and-burn. Agric. Ecosyst. and Environm. 58: 39–48Google Scholar
- Boserup, E., 1965. Conditions of Agricultural Growth. Aldine, Chicago, USA.Google Scholar
- Brady, N. C., 1996. Alternatives to slash-and-burn: a global imperative. Agric. Ecosyst. and Environm. 58: 3–11Google Scholar
- Danhof, G. N., 1941. Tweede bijdrage tot oplossing van het alang-alang vraagstuk in de Lampongse Districten. [Second contribution to solving the alang-alang problem in the Lampung Districts]. Tectona 34: 67–85.Google Scholar
- FAO/MacKinnon, J., 1982. National Conservation Plan for Indonesia, Vol. II. Sumatra. FAO, Bogor. (10. 2. 16 ).Google Scholar
- Hagreis, B. J., 1930. Ladangbouw [Shifting cultivation]. Landbouw 6: 43–78.Google Scholar
- Hairiah, K.., G. Cadisch, M. van Noordwijk, A. R. Latief and G. Mahabharata, Syekhfani, 1995. Size-density and isotopic fractionation of soil organic matter after forest conversion. In: A. Schulte and D. Ruhiyat (eds.) Proc. Balikpapan Conf. on Forest Soils Vol. 2: 70–87Google Scholar
- Hardon, H. J., 1936. Factoren, die het organische stof-en het stikstofgehalte van tropische gronden beheerschen [Factors, controlling the organic matter and the nitrogen content of tropical soils]. Landbouw XI (12): 517–540.Google Scholar
- IPCC, 1990. Climate change: the IPCC scientific assessment. Cambridge University Press, Cambridge (UK )Google Scholar
- Izac, A. M. and C. A. Palm, 1994. Guidelines for characterization and diagnosis for the global project on alternatives to slash-and-burn. ICRAF, Nairobi.Google Scholar
- Juo, A. S. R. and Manu, A., 1996. Chemical dynamics in slash-and-burn agriculture. Agric. Ecosyst. and Environm. 58: 49–69Google Scholar
- Koens, A. J., 1925. Ladangbouw [Shifting cultivation]. Landbouw 1: 334–340.Google Scholar
- Malingreau, J. P. and R. Christiani, 1981. A land cover/ land use classification for Indonesia. First revision. Indonesian J. of Geog. 11 (41): 13–47.Google Scholar
- Marsden, W. H. 1811. The History of Sumatra. Reprinted from 3rd edition, by Oxford University Press, Oxford.Google Scholar
- Meijboom, F. W, Hassink J. and Van Noordwijk, M., 1995. Density fractionation of soil macroorganic matter using silica suspensions. Soil Biol. B io chem. 27: 1109–1111.Google Scholar
- Murdiyarso, D. M., Hairiah, K. and Van Noordwijk, M. (Eds.) Modelling and Measuring Soil Organic Matter Dynamics and Greenhouse Gas Emissions after Forest Conversion. Proceedings of Workshop/ Training Course 8–15 August 1994, Bogor/Muara Tebo. ASB-Indonesia publication No. 1.Google Scholar
- Nugroho, S. G., Lumbanraja, J., Suprapto, H., Sunyoto, Ardjasa, W. S., Haraguchi, H. and Kimura, M., 1996. Three-year measurement of methane emission from an Indonesian paddy field. Plant and Soil 181: 287–293.Google Scholar
- Nye and Greenland, 1960 The Soil under Shifting Cultivation. Commonwealth Bureau of Soils Tech. Comm. 51, Harpenden, UK.Google Scholar
- Palm, C. A., Swift, M. J. and Woomer, P. L., 1996. Soil biological dynamics in slash-and-burn. Agric. Ecosyst. and Environm. 58: 61–74.Google Scholar
- Richards, J. F. and Flint, E. P., 1993. Historic land use and carbon estimates for South and Southeast Asia, 1880–1980. Carbondioxide information analysis center, Oak Ridge National Laboratory, Environmental Sciences Division Publication No. 4174. 326 pp.Google Scholar
- Sanchez, P. A., Palm, C. A. and Smyth, T. J., 1990. Approaches to mitigate tropical deforestation by sustainable soil management practices. In: Scharpenseel, H. W., Schomaker, M. and Ayoub A. (eds.) Soils on a Warmer Earth. Elsevier, Amsterdam, p. 211–220.Google Scholar
- Scholz U., 1983. The natural regions of Sumatra and their agricultural production pattern. A regional analysis. Central Research Institute for Food Crops ( CRIFC ). Bogor.Google Scholar
- Tinker, P. B., Ingram, J. S. I., and Struwe, S., 1996, Effects of slash-andburn agriculture and deforestation on climate change. Agric. Ecosyst. and Environm. 58: 13–22.Google Scholar
- Tomich, T. P. and M. van Noordwijk, 1996. What drives deforestation in Sumatra? in: B. Rerkasem (ed.) Montane Mainland Southeast Asia in Transition, Chiang Mai University, Thailand, pp 120–149.Google Scholar
- Torquebiau, E., 1984. Man-made Dipterocarp forest in Sumatra. Agroforestry Systems 2 (2): 103–128.Google Scholar
- Van Noordwijk, M., T. P. Tomich, R. Winahyu, D. Murdiyarso, S. Partoharjono and A. M. Fagi (editors) 1995. Alternatives to Slash-and Burn in Indonesia, Summary Report of Phase 1. ASB-Indonesia Report Number 4, Bogor, IndonesiaGoogle Scholar
- Van Noordwijk, M., Cerri, C., Woomer, P. L., Nugroho, K. and Bernoux, M.,1997 Soil carbon dynamics in the humid tropical forest zone. Geo-derma (in press)Google Scholar
- Van Steenis, C. G. G. J., 1935. Maleische vegetatieschetsen [Sketches of Malaysian vergetation]. Tijd. Kon. Ned. Aard. Gen. 52: 25–67, 171–203, 363–390.Google Scholar