Abstract
Topsoil properties were determined in forest gardens established about 20 years ago on eroded grassland soils (abandoned tea lands) in the wet zone of the Sri Lankan highlands. They were compared with adjacent, eroded grasslands (abandoned tea lands) on strongly weathered soils vs soils at earlier stages of pedogenic development in a two-way analysis of variance. Soil pH in forest gardens was, on average, 6.1, nearly one unit higher than in the adjacent grasslands. In the garden soils, the cation exchange capacity (CEC measured at pH 4.8) was nearly double, exchangeable calcium concentrations five times and exchangeable magnesium three times as high as in the grasslands soils. Total soil N content was found to be nearly 40% higher in the gardens. Topsoil gravel contents in the gardens were less than half as high as in the grasslands. The increases in exchangeable bases and N in gardens, relative to grasslands, were attributed to increased nutrient retention and acquisition. Higher retention was partly due to the higher CECpH4.8, and probably to reduced erosion and increased, continuous fine root density in the garden topsoils. Higher field CEC in gardens was likely to result from generally higher C contents and from the reversal of acidification, presumably caused by base accumulation and decomposition processes. Our results suggest that forest garden establishment on degraded grasslands can lead to accumulation of mobile nutrients in the topsoil, probably due to increased nutrient retention, subsoil uptake and litter input exceeding nutrient uptake by the standing biomass.
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References
Allen SE (1989) Chemical analysis of ecological materials, 2nd edn. Blackwell, Oxford
Amador JA, Wang Y, Savin MC, Görres JH (2000) Fine-scale spatial variability of physical and biological soil properties in Kingston, Rhode Island. Geoderma 98:83–94
Amarasinghe L, Pemadasa MA (1982) The ecology of montane grassland in Sri Lanka: II. The pattern of four major species. J Ecol 70:17–23
Anderson JM, Ingram JSI (1993) Tropical soil biology and fertility: a handbook of methods, 2nd edn. CAB International, Wallingford
Aweto AO (1981) Secondary succession and soil fertility restoration in South-Western Nigeria: III. Soil and vegetation interrelationships. J Ecol 69:957–963
Berish CW, Ewel JJ (1988) Root development in simple and complex tropical successional ecosystems. Plant Soil 106:73–84
Botschek J, Skowronek A, Jayakody AN (1998) Soil degradation, soil assessment and soil rehabilitation in a former tea-growing area of Sri Lanka. Appl Geogr Dev 51:94–105
Bruijnzeel LA (1998) Soil chemical changes after tropical forest disturbance and conversion: the hydrological perspective. In: Schulte A, Ruhiyat D (eds) Soils of tropical forest ecosystems: characteristics, ecology, and management. Springer, Berlin Heidelberg New York, pp 45–61
Detwiler RP (1986) Land use change and global carbon cycle: the role of tropical soil. Biogeochemistry 2:67–93
Ewel JJ (1999) Natural systems as models for the design of sustainable systems of land use. Agrofor Syst 45:1–21
FAO–ISRIC–ISSS (1998) World Reference Base for Soil Resources (WRB). Food and Agriculture Organization of the United Nations, International Soil Reference and Information Centre, International Society of Soil Science, Rome. Fulltext: http://www.fao.org/docrep/W8594E/w8594e00.htm
FitzPatrick EA (1992) Soil description. University of Aberdeen, Aberdeen
de Foresta H, Michon G (1997) The agroforest alternative to Imperata grasslands: when smallholder agriculture and forestry reach sustainability. Agrofor Syst 36:105–120
Garrity DP, Soekardi M, van Noordwijk M, de la Cruz R, Pathak PS, Gunasena HPM, Van So N, Huijun G, Majid NM (1997) The Imperata grasslands of tropical Asia: area, distribution, and typology. Agrofor Syst 36:3–29
GSMB (1996) Sri Lanka Geology—Provisional map series, 1:50,000. Geological Survey and Mines Bureau of Sri Lanka, Colombo
Haynes RJ, Mokolobate MS (2001) Amelioration of Al toxicity and P deficiency in acid soils by additions of organic residues: a critical review of the phenomenon and the mechanisms involved. Nutr Cycl Agroecosyst 59:47–63
Huntington HP (2000) Using traditional ecological knowledge in science: methods and applications. Ecol Appl 10:1270–1274
Ilstedt U, Nordgren A, Malmer A (2000) Optimum soil water for soil respiration before and after amendment with glucose in humid tropical acrisols and a boreal mor layer. Soil Biol Biochem 32:1591–1599
Kahindi JHP, Woomer P, George T, Souza Moreira FM de, Karanja NK, Giller KE (1997) Agricultural intensification, soil biodiversity and ecosystem function in the tropics: the role of nitrogen-fixing bacteria. Appl Soil Ecol 6:55–76
Kinraide TB (1998) Three mechanisms for the calcium alleviation of mineral toxicities. Plant Physiol 118:513–520
Kotto-Same J, Woomer PL, Appolinaire M, Louis Z (1997) Carbon dynamics in slash-and-burn agriculture and land use alternatives of the humid forest zone in Cameroon. Agric Ecosyst Environ 65:245–256
Krishnarajah P (1985) Soil erosion control measures for tea land in Sri Lanka. Sri Lankan J Tea Sci 54:91–100
Ladd JN, Foster RC, Nannipieri P, Oades JM (1996) Soil structure and biological activity. In: G Stotzky, J-M Bollag (eds) Soil biochemistry 9. Marcel Dekker, pp 23–78
Liebman M, Dyck E (1993) Crop-rotation and intercropping strategies for weed management. Ecol Appl 3:92–122
Macdicken KG, Hairiah K, Otsamo A, Duguma B, Majid NM (1997) Shade-based control of Imperata cylindrica: tree fallows and cover crops. Agrofor Syst 36:131–149
McGrath DA, Smith CK, Gholz HL, Oliveira FD (2001) Effects of land-use change on soil nutrient dynamics in Amazonia. Ecosystems 4:625–645
Menzies NW, Gillman GP (1997) Chemical characterization of soils of a tropical humid forest zone: a methodology. Soil Sci Soc Am J 61:1355–1363
MINITAB (2000) MINITAB Statistical Software 13.1 for Windows
Müller-Dombois D, Perera M (1971) Ecological differentiation and soil fungal distribution in the montane grasslands of Ceylon. Ceylon J Sci Biol Sci 9:1–41
Nair PKR (2001) Do tropical homegardens elude science, or is it the other way round? Agrofor Syst 53:239–245
Nakano K, Syahbuddin (1989) Nutrient dynamics in forest fallows in south-east Asia. In: Proctor J (ed) Mineral nutrients in tropical forest and savanna ecosystems. Blackwell, Oxford, pp 325–336
Noble AD, Gillman GP, Ruaysoongnern S (2000) A cation exchange index for assessing soil degradation of acid soil by further acidification under permanent agriculture in the tropics. Eur J Soil Sci 51:233–243
Norton D, Shainberg I, Cihacek L, Edwards JH (1999) Erosion and soil chemical properties. In: Lal R (ed) Soil quality and erosion. CRC Press, Boca Raton, pp. 39–56
Nuberg IK, Evans DG, Senanayake R (1994) Future of forest gardens in the Uvan Uplands of Sri Lanka. Environ Manage 18:797–814
Orchard VA, Cook FJ, Corderoy DM (1992) Field and laboratory studies on the relationships between respiration and moisture for two soils of contrasting fertility status. Pedobiologia 36:21–33
Panabokke CR (1996) Soils and agro-ecological environments of Sri Lanka. Natural resources series, vol 2. NARESA, Colombo
Peña-Claros M (2003) Changes in forest structure and species composition during secondary forest succession in the Bolivian Amazon. Biotropica 35:450–461
Perera AH, Rajapakse RMN (1991) A baseline study of Kandyan forest gardens of Sri Lanka: structure, composition and utilization. For Ecol Manag 45:269–280
Powers WJ, van Horn HH (2001) Nutritional implications for manure nutrient management planning. Appl Eng Agric 17:27–39
Singh JS, Gupta SR (1977) Plant decomposition and soil respiration in terrestrial ecosystems. Bot Rev 43:449–528
Sirois MS, Margolis HA, Camiré C (1998) Influence of remnant trees on nutrients and fallow biomass in slash and burn agroecosystems in Guinea. Agrofor Syst 40:227–246
Stocking MA, Clark R (1999) Soil productivity and erosion: biophysical and farmer-perspective assessment for hillslopes. Mt Res Dev 19:191–202
Stocking MA, Murnaghan N (2001) Land degradation—guidelines for field assessment. People, Land Management and Environmental Change Project (PLEC) Database, United Nations University (UNU). Fulltext: http://www.unu.edu/env/plec/l-degrade/index-toc.html
Tian G, Salako, FK, Ishida F, Zang J (2001) Biological restoration of a degraded alfisol in the humid tropics using planted woody fallow: synthesis of 8-year results. In: Stott DE, Mohtar RH, Steinhardt GC (eds) Sustaining the global farm. Selected papers from the 10th International Soil Conservation Organization Meeting, May 24–29, 1999 at Purdue University and the USDA-ARS National Soil Erosion Research Laboratory, pp 333–337 Fulltext: http://topsoil.nserl.purdue.edu/nserlweb/isco99/pdf/ISCOdisc/SustainingTheGlobalFarm/P232-Tian.pdf
Tiessen H (1998) Resilience of phosphorus transformations in tropical forest and derived ecosystems. In: Schulte A, Ruhiyat D (eds) Soils of tropical forest ecosystems: characteristics, ecology, and management. Springer, Berlin Heidelberg New York pp 92–98
Wood S, Sebastian K, Scherr SJ (2000) Soil resource condition. In: Pilot analysis of global ecosystems (PAGE): agroecosystems. International Food Policy Research Institute (IFPRI)/World Resources Institute (WRI), Washington, pp 45–54. Fulltext: http://wri.igc.org/wr2000/agroecosystems_page.html
Acknowledgements
We would like to thank the Natural Resource Management Centre of the Sri Lankan Department of Agriculture for providing daily rainfall data and Dr. Seneviratne Somaratne for his help with the measurement of soil respiration. We acknowledge the following organisations for contributing funds: University of Aberdeen, Carnegie Trust for the Universities of Scotland, Royal Geographical Society, Institute of Biology, Studienstiftung des deutschen Volkes (German National Academic Foundation), Gilchrist Educational Trust, Percy Sladen Memorial Fund.
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Siddique, I., Gutjahr, C., Seneviratne, G. et al. Changes in soil chemistry associated with the establishment of forest gardens on eroded, acidified grassland soils in Sri Lanka. Biol Fertil Soils 44, 163–170 (2007). https://doi.org/10.1007/s00374-007-0190-1
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DOI: https://doi.org/10.1007/s00374-007-0190-1