Alfred E. HARTEMINK, Tom VELDKAMP, Zhanguo BAI

Land Cover Change and Soil Fertility Decline in Tropical Regions

Land cover changes influence the biogeochemistry, hydrology, and climate of the earth. Studies that assessed land cover changes at the global scale mostly focused on: deforestation, cropland expansion, dry land degradation, urbanisation, pasture expansion, and agricultural intensification. For the assessment, remotely sensed land-cover data, census data, and expert knowledge were used. In tropical regions, forest is cleared for the expansion of cropland, wood extraction, or infrastructure expansion. This widely occurs in the Amazon region and in Asia. In many temperate regions, the area under forest is increasing although forest plantations are also on the increase in the tropics. Croplands expanded by 50% during the 20th century, from roughly 1200 million ha in 1900 to 1800 million ha in 1990. It appears that there is no major desertification in the Sahel region and that urbanisation and most highly-populated cities are found in tropical regions. In China, the area under cropland increased from 98 to 130 million ha between 1949 and 1996. In the same period the area under forest almost doubled. In temperate regions, agricultural land is being taken out of production (set-aside), planted with biofuel crops or converted to recreational or building areas. Some areas appear to be more affected by rapid land-cover change because they are studied more intensively. There are several interacting drivers for land cover change but the exponential growth in human population is important. Currently, 95% of the population growth takes place in tropical regions. Soil fertility in tropical regions is affected by rapid land cover changes. The effects of deforestation and grassland conversions as well as agricultural intensification have been fairly well-documented. The spatial and temporal effects of soil fertility change and its interaction with land cover change remains to be investigated.

Anahtar Kelimeler:

Land use change, tropical regions, soil fertility, China, deforestation, cropland

Land Cover Change and Soil Fertility Decline in Tropical Regions

Keywords:

Land use change, tropical regions, soil fertility, China, deforestation, cropland,

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Abbot, J.I.O. and K. Homewood. 1999. A history of change: causes of miombo woodland decline in a protected area in Malawi. Journal of Applied Ecology. 36: 422-433.
Achard, F., H.D. Eva, H.-J. Stibig, P. Mayaux, J. Gallergo, T. Richards, and J.-P. Malingreau. et al., 2002. Determination of deforestation rates of the world's humid tropical forests. Science. 297: 999-1002.
Bennett, H.H. 1939. Soil Conservation. McGraw-Hill Book Company, Inc, New York & London.
Blum, W.H., 1997. Basic concepts: Degradation, resilience, and rehabilitation. In: R. Lal, W.H. Blum, C. Valentin and B.A. Stewart (Editors), Methods for assessment of soil degradation. CRC Press, Boca Raton, pp. 1-16.
Boels, D., D.B. Davies, and A.E. Johnston. (Editors). 1981. Soil degradation. A.A. Balkema, Rotterdam.
Bouma, J., J. Stoorvogel, B.J. van Alphen, and H.W.G. Booltink. 1999. Pedology, precision agriculture, and the changing paradigm of agricultural research. Soil Science Society of America Journal. 63: 1763-1768.
Bridges, E.M. and H. de Bakker. 1997. Soils as an artefact: human impacts on the soil resource. The Land. 1: 197-215.
Brown, A.G., E.K.S. Nambiar, and C. Cossalter. 1997. Plantations for the tropics - their role, extent and nature. In: E.K.S. Nambiar and A.G. Brown (Editors), Management of soil, nutrients and water in tropical plantation forests. ACIAR, Canberra, pp. 1-23.
Caron, J., C.R. Espindola, and D.A. Angers. 1996. Soil structural stability during rapid wetting - influence of land use on some aggregate properties. Soil Science Society of America Journal. 60: 901-908.
Cerri, C.C. and F. Andreux. 1990. Changes in organic carbon content in Oxisols cultivated with sugar cane and pasture, based on 13C natural abundance measurement, 14th International Congress of Soil Science, Kyoto, pp. 98-103.
Conte, C.A., 1999. The forest becomes desert: Forest use and environmental change in Tanzania's West Usambara mountains. Land Degradation & Development. 10: 291-309.
Dent, D.L. and L.J. Pons. 1995. A world perspective on acid sulphate soils. Geoderma. 67: 263-276.
Dias, A.C.C.P. and S. Nortcliff S. 1985. Effects of two land clearing methods on the physical properties of an Oxisol in the Brazilian Amazon. Tropical Agriculture. 62: 207-212.
Dobermann A., C. Witt, S. Abdulrachman, H.C. Gines, R. Nagarajan, T.T. Son, P.S. Tan, G.H. Wang, N.V. Chien, V.T.K. Thoa, C. V. Phung, P. Stalin, P. Muthukrishnan, V. Ravi, M. Babu, G.C. Simbahan, M.A.A. Adviento, and V. Bartolome. 2003. Estimating indigenous nutrient supplies for site-specific nutrient management in irrigated rice. Agronomy Journal. 95: 924-935.
Dudal, R., 1982. Land degradation in a world perspective. Journal of Soil and Water Conservation. 37: 245-249.
Eden, M.J., 1996. Land degradation: Environmental, social and policy issues. In: M.J. Eden and J.T. Parry (Editors), Land degradation in the tropics - Environmental and policy issues. Pinter, London, pp. 3-18.
Endfield, G.H. and S.L. O'Hara. 1999. Perception or deception? Land degradation in post-conquest Michoacan, west central Mexico. Land Degradation & Development. 10: 383-398.
Evans, J., 1992. Plantation forestry in the tropics, 2nd edition. Clarendon Press, Oxford.
FAO-Staff, 1957. Shifting cultivation. Tropical Agriculture. 34: 159- 164.
FAO, 1971. Land degradation. Soil Bulletin no. 13. FAO, Rome.
Fu, B.J., X.D. Guo, L.D. Chen, K.M. Ma, and J.R. Li. 2001. Soil nutrient changes due to land use changes in Northern China: a case study in Zunhua County, Hebei Province. Soil Use & Management. 17: 294-296.
Geist, H.J. and E.F. Lambin. 2002. Proximate causes and underlying driving forces of tropical deforestation. Bioscience. 52: 143-150.
Ghuman, B.S. and R. Lal. 1991. Land clearing and use in the humid Nigerian tropics: II. Soil chemical properties. Soil Science Society of America Journal. 55: 184-188.
Ghuman, B.S., R. Lal, and W. Shearer. 1991. Land clearing and use in the humid Nigerian tropics: I. Soil physical properties. Soil Science Society of America Journal. 55: 178-183.
Gray, L.C. 1999. Is land being degraded? A multi-scale investigation of landscape change in southwestern Burkina Faso. Land Degradation & Development. 10: 329-343.
Hartemink, A.E. 1998. Soil Chemical and Physical Properties as Indicators of Sustainable Land Management under Sugar Cane in Papua New Guinea. Geoderma. 85: 283-306.
Hartemink, A.E. 2005a. Nutrient stocks, nutrient cycling, and soil changes in cocoa ecosystems - a review. Advances in Agronomy. 86: 227-253.
Hartemink, A.E. 2005b. Plantation agriculture in the tropics - environmental issues. Outlook on Agriculture. 34: 11-21.
Hartemink, A.E. 2006. Assessing soil fertility decline in the tropics using soil chemical data. Advances in Agronomy. 89: 179-225.
Hassink, J. 1992. Effects of soil texture and structure on carbon and nitrogen mineralization in grassland soils. Biology and Fertility of Soils. 14: 126-134.
Henao, J. and C. Baanante. 1999. Estimating rates of nutrient depletion in soils of agricultural lands of Africa. IFDC, Muscle Shoals.
Holmgren, P., E.J. Musakha, and H. Sjöholm. 1994. Not all African and is being degraded: A recent survey of trees on farms in Kenya reveals rapidly increasing forest resources. Ambio. 23: 390-395.
Hulugalle, N.R. 1994. Long-term effects of land clearing methods, tillage systems and cropping systems on surface soil properties of a tropical alfisol in Sw Nigeria. Soil Use & Management. 10: 25- 30.
Imbernon, J. 1999a. Changes in agricultural practice and landscape over a 60-year period in North Lampung, Sumatra. Agriculture Ecosystems & Environment. 76: 61-66.
Imbernon, J. 1999b. Pattern and development of land-use changes in the Kenyan highlands since the 1950s. Agriculture Ecosystems & Environment. 76: 67-73.
Jansen, L.J.M. and A. Di Gregorio. 2002. Parametric land cover and land-use classification as tools for environmental change detection. Agriculture Ecosystems & Environment. 91: 89-100.
Jones, S. 1999. From meta-narratives to flexible frameworks: an actor analysis of land degradation in Highland Tanzania. Global Environmental Change. 9: 211-219.
Juo, A.S.R. and A. Manu. 1996. Chemical dynamics in slash-and-burn agriculture. Agriculture Ecosystems & Environment. 58: 49-60.
Kammerbauer, J. and C. Ardon. 1999. Land use dynamics and landscape change pattern in a typical watershed in the hillside region of central Honduras. Agriculture Ecosystems & Environment. 75: 93-100.
Kaoneka, A.R.S. and B. Solberg. 1994. Forestry related land use in the West Usambara mountains, Tanzania. Agriculture Ecosystems & Environment. 49: 207-215.
Kaoneka, A.R.S. and B. Solberg. 1997. Analysis of deforestation and economically sustainable farming systems under pressure of population growth and income constraints at the village level in Tanzania. Agriculture Ecosystems & Environment. 62: 59-70.
Laegreid, M., O.C. Bockman, and O. Kaarstad. 1999. Agriculture Fertilizers and the Environment. CABI Publishing, Wallingford, in association with Norsk Hydro ASA, Oslo.
Lal, R. 1986. Conversion of tropical rainforest: agronomic potential and ecological consequences. Advances in Agronomy. 39: 173-264.
Lal, R. 1989. Land degradation and its impact on food and other resources. In Food and Natural Resources, (Ed., D. Pimentel). San Diego: Academic Press. pp. 85-140.
Lal, R. 2001. Soil degradation by erosion. Land Degradation & Development. 12: 519-539.
Lambin, E.F., B.L. II Turner, H.J. Geist, S. Agbola, A. Angelsen, J.W. Bruce, O. Coomes, R. Dirzo, G. Fischer, C. Folke, P.S. George, K. Homewood, J. Imbernon, R. Leemans, X. Li, E.F. Moran, M. Mortimore, P.S. Ramakrishnan, J.F. Richards, H. Skånes, W. Steffen, G.D. Stone, U. Svedin, T. Veldkamp, C. Vogel, and J. Xu. 2001. The causes of land-use and land-cover change - Moving beyond the myths Global Environmental Change: Human and Policy Dimensions. 11: 261-269.
Lambin, E.F., H.J. Geist, and E. Lepers. 2003. Dynamics of land-use and land-cover change in tropical regions. Annual Review of Environment & Resources. 28: 205-241.
Leff, B., N. Ramankutty, and J.A. Foley. 2004. Geographic distribution of major crops across the world. Global Biogeochemical Cycles. 18: 1-27
Lepers E., E.F. Lambin, A.C. Janetos, R. DeFries, F. Achard, N. Ramankutty, R.J. Scholes. 2005. A synthesis of information on rapid land-cover change for the period 1981-2000. BioScience. 55: 115-124.
Li, Y. (Editor). 2000. Land resources of China. China Land Press, Beijing.
Lin, G.C.S. and S.P.S. Ho. 2003. China’s land resources and land-use change: insights from the 1996 land survey. Land Use Policy. 20: 87-107.
Liu, J.Y. and Buheaosier. 2000. A study on spatial-temporal feature of modern land use change in China: using remote sensing technologies. Quarternary Sciences. 20: 229-239.
Lumbanraja, J., T. Syam, H. Nishide, A.K. Mahi, M. Utomo, Sarno, and M. Kimura. 1998. Deterioration of soil fertility by land use changes in South Sumatra, Indonesia - from 1970 to 1990. Hydrological Processes. 12: 2003-2013.
Lutz, W., W. Sanderson, and S. Scherbov. 2001. The end of world population growth. Nature. 412: 543-545.
McAlpine, J., D.F. Freyne, and G. Keig. 2001. Land use and population change in PNG: 1975-1995. In: R.M. Bourke, M. Allen and J. Salisbury (Editors), Food Security in Papua New Guinea. ACIAR, Canberra, pp. in the press.
Meertens, H.C.C., L.O. Fresco, and W.A. Stoop. 1996. Farming systems dynamics: Impact of increasing population density and the availability of land resources on changes in agricultural systems. The case of Sukumaland, Tanzania. Agriculture, Ecosystems and Environment. 56: 203-215.
Murty, D., M.U.F. Kirschbaum, R.E. McMurtrie, and A. McGilvray. 2002. Does conversion of forest to agricultural land change soil carbon and nitrogen? a review of the literature. Global Change Biology. 8: 105-123.
Ningal, T., A.E. Hartemink, and A. Bregt. 2008. Land use change in the Morobe province of Papua New Guinea between 1975 and 2000. Journal of Environmental Management, (in the press).
Nye, P.H. and D.J. Greenland. 1960. The soil under shifting cultivation. Technical communication no. 51. Commonwealth Bureau of Soils, Harpenden. UK. Technical Communication. 51: 73–126.
Oldeman, L.R., R.T.A. Hakkeling, and W.G. Sombroek. 1991. World map of the status of human-induced soil degradation: an explanatory note, 2nd revised edition. ISRIC, Wageningen. pp. 35.
Ovuka, M. 2000. More people, more erosion? Land use, soil erosion and soil productivity in Murang'a District, Kenya. Land Degradation & Development. 11: 111-124.
Pelkey, N., C. Stoner, and T. Caro. 2000. Vegetation in Tanzania: assessing long term trends and effects of protection using satellite imagery. Biological Conservation. 94: 297-309.
Pennock, D.J., D.W. Anderson, and E. Dejong. 1994. Landscape-Scale Changes in Indicators of Soil Quality Due to Cultivation in Saskatchewan, Canada. Geoderma. 64: 1-19.
Pieri, C. 1989. Fertilité des terres de savanes. Ministère de la Cooperation et CIRAD-IRAT, Paris.
Poels, R.L.H. 1989. Nutrient input and output in undisturbed and silviculturally treated tropical rain forest in Suriname. Netherlands Journal of Agricultural Science. 37: 383-386.
PORIM. 1994. Environmental impacts of oil palm plantations in Malaysia, Palm Oil Research Institute of Malaysia, Malaysia.
Qing, M.Z. 1999. Assessment on influence of agricultural land use on soil nutrient fertility in red soil hills region. Journal of Mountain Science. 17: 71-75.
Ramankutty, N. and J.A. Foley. 1998. Characterizing patterns of global land use: An analysis of global croplands data. Global Biogeochemical Cycles. 12: 667-685.
Ramankutty, N. and J.A. Foley. 1999. Estimating historical changes in gloal land cover: Croplands from 1700 to 1992. Global Biogeochemical Cycles. 13: 997-1027.
Ramankutty, N., J.A. Foley, J. Norman, and K. McSweeney. 2002a. The global distribution of cultivable lands: current patterns and sensitivity to possible climate change. Global Ecology and Biogeography. 11: 377-392.
Ramankutty, N., J.A. Foley, and N.J. Olejniczak. 2002b. People on the land: Changes in global population and croplands during the 20th century. Ambio. 31: 251-257.
Sanchez, P.A., 2002. Soil fertility and hunger in Africa. Science. 295: 2019-2020.
Sanchez, P.A., C.A. Palm, C.B. Davey, L.T. Szott, and C.E. Russel. 1985. Tree crops as soil improvers in the humid tropics? In: M.G.R. Cannell and J.E. Jackson (Editors), Attributes of trees as crop plants. Institute of Terrestrial Ecology, Huntingdon, pp. 79-124.
Sanchez, P.A. and J.G. Salinas. 1981. Low-input technology for managing Oxisols and Ultisols in tropical America. Advances in Agronomy. 34: 279-406.
Sanchez, P.A., J.H. Villachica, and D.E. Bandy. 1983. Soil fertility dynamics after clearing a tropical rainforest in Peru. Soil Science Society of America Journal. 47: 1171-1178.
Sanders, D.W. 1992. International activities in assessing and monitoring soil degradation. American Journal of Alternative Agriculture. 7: 17-24.
Seto, K.C., R.K. Kaufmann, and C.E. Woodcock. 2000. Landsat reveals China's farmland reserves, but they're vanishing fast. Nature. 406: 121.
Shantz, H.L. and C.F. Marbut. 1923. The vegetation and soils of Africa. National Research Council and the American Geographical Society, New York.
Shantz, H.L. and B.L. Turner. 1958. Photographic documentation of vegetational changes in Africa over a third of a century. Report 169. University of Arizona, Arizona.
Spaans, E.J.A., G. A. M. Baltissen, J. Bouma, R. Miedema, A. L. E. Lansu, D. Schoonderbeek, and W. G. Wielemaker. 1989. Changes in physical properties of young and old volcanic surface soils in Costa Rica after clearing of tropical rain forest. Hydrological Processes. 3: 383-392.
Stoorvogel, J.J., B.H. Janssen, and N. van Breemen. 1997. The nutrient budgets of a watershed and its forest ecosystems in the Taï National Park in Côte d'Ivoire. Biogeochemistry. 37: 159-172.
Stoorvogel, J.J. and E.M.A. Smaling. 1990. Assessment of soil nutrient decline in Sub-Saharan Africa, 1983-2000. Report no. 28, Winand Staring Centre-DLO, Wageningen.
Sun, B., S.L. Zhou, and Q.G. Zhao. 2003. Evaluation of spatial and temporal changes of soil quality based on geostatistical analysis in the hill region of subtropical China. Geoderma. 115: 85-99.
Syam T, H. Nishide, A.K. Salam, M. Utomo, A.K. Mahi, J. Lumbanraja, S.G. Nugroho, and M. Kimura. 1997. Land use and cover changes in a hilly area of South Sumatra, Indonesia (from 1970 to 1990). Soil Science & Plant Nutrition. 43: 587-599.
Sylvester-Bradley R, E. Lord, D.L. Sparkes, R.K. Scott, J.J.J. Wiltshire, and J. Orson. 1999. An analysis of the potential of precision farming in Northern Europe. Soil Use & Management. 15: 1-8.
Tekle, K. and L. Hedlund. 2000. Land cover changes between 1958 and 1986 in Kalu District, Southern Wello, Ethiopia. Mountain Research and Development. 20: 42-51.
Tiffen, M., M. Mortimore, and F. Gichuki. 1994. More people, less erosion. Environmental recovery in Kenya. John Wiley & Sons Ltd, Chichester.
Tilman, D. 1999. Global environmental impacts of agricultural expansion: The need for sustainable and efficient practices. Proceedings National Academy of Sciences. 96: 5995-6000.
Tilman, D., K.G. Cassman, P.A. Matson, R. Naylor, and S. Polasky. 2002. Agricultural sustainability and intensive production practices. Nature. 418: 671-677.
Tong, C.L., C.A.S. Hall, and H.Q. Wang. 2003. Land use change in rice, wheat and maize production in China (1961-1998). Agriculture Ecosystems & Environment. 95: 523-536.
van der Pol, F. 1992. Soil mining, an unseen contributor to farm income in southern Mali. Royal Tropical Institute, Amsterdam.
van Groenigen, J.W., M. Gandah, and J. Bouma. 2000. Soil sampling strategies for precision agriculture research under sahelian conditions. Soil Science Society of America Journal. 64: 1674- 1680.
van Lynden, G.W.J. and L. Oldeman. 1997. Soil degradation in south and southeast Asia. ISRIC/UNEP/FAO, Wageningen/Nairobi/Rome.
van Noordwijk, M., C. Cerri, P.L. Woomer, K. Nugroho, and M. Bernoux. 1997. Soil carbon dynamics in the humid tropical forest zone. Geoderma. 79: 187-225.
Veldkamp, A., K. Kok, G.H.J. De Koning, J.M. Schoorl, M.P.W. Sonneveld, and P.H. Verburg. 2001. Multi-scale system approaches in agronomic research at the landscape level. Soil & Tillage Research. 58: 129-140.
Veldkamp, E. 1994. Organic Carbon Turnover in 3 Tropical Soils under Pasture after Deforestation. Soil Science Society of America Journal. 58: 175-180.
Verburg, P.H., A. Veldkamp, and J. Bouma. 1999. Land use change under conditions of high population pressure: the case of Java. Global Environmental Change. 9: 303-312.
Viscarra Rossel, R.A. and A.B. McBratney. 1998. Soil chemical analytical accuracy and costs: implications from precision agriculture. Australian Journal of Experimental Agriculture. 38: 765-775.
Vitorello, V.A., C.C. Cerri, F. Andreux, C. Feller, and R.L. Victoria. 1989. Organic matter and natural carbon-13 distribution in forested and cultivated Oxisols. Soil Science Society of America Journal. 53: 773-778.
Wang, G.X., H.Y. Ma, J. Qian, and J. Chang. 2004. Impact of land use changes on soil carbon, nitrogen and phosphorus and water pollution in an arid region of northwest China. Soil Use & Management. 20: 32-39.
Wang, J., B.J. Fu, Y. Qiu, and L.D. Chen. 2003. The effects of land use and its patterns on soil properties in a small catchment of the Loess Plateau. Journal of Environmental Sciences. 15: 263-266.
Willet, I.R. 1994. Physical and chemical constraints to sustainable soil use under rainfed conditions in the humid tropics of southeast Asia. In: J.K. Syers and D.L. Rimmer (Editors), Soil science and sustainable land management in the tropics. CAB International, Wallingford, pp. 235-247.
Wu, R.G. and H. Tiessen. 2002. Effect of land use on soil degradation in alpine grassland soil, China. Soil Science Society of America Journal. 66: 1648-1655.
Yemefack, M., D.G. Rossiter, and R. Njomgang. 2005. Multi-scale characterization of soil variability within an agricultural landscape mosaic system in southern Cameroon. Geoderma. 125: 117-143.
Young, A. 1999. Is there really spare land? A critique of estimates of available cultivable land in developing countries. Environment, Development and Sustainability. 1: 3-18.
Zhu, H.Y., C.H. Lu, and X. Li. 2004. Land use studies in China. Journal of Geographical Sciences. 14: 69-73.