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Agroforestry Systems

, Volume 43, Issue 1–3, pp 49–70 | Cite as

Nutrient cycling in an agroforestry system with runoff irrigation in Northern Kenya

  • J. LehmannEmail author
  • D. Weigl
  • K. Droppelmann
  • B. Huwe
  • W. Zech
Article

Abstract

A nutrient balance was determined for sole and alley cropped Sorghum bicolor and Acacia saligna in a runoff irrigation system in Northern Kenya. Nutrient input including precipitation and runoff, and output through harvest and leaching were measured for N, P, K, Ca and Mg using adsorption resins, tensiometry and suction cups. Various management scenarios are discussed with respect to nutrient return. Nutrient input with rainfall was generally low in comparison to nutrient uptake or leaching losses. The irrigation water, however, constituted an important nutrient input, especially for Ca and Mg. Nutrient export with the harvest was large for N and K, but can effectively be reduced by a nutrient return with mulch. Nutrient leaching losses from the topsoil (0–30 cm) were lower in the sorghum monoculture than in the tree-based systems. In the subsoil (120 cm), however, leaching was effectively reduced by the trees. In the agroforestry system, leaching losses of N under the sorghum were 53% lower than in the sorghum monoculture. This could be attributed to a higher root abundance and a higher ratio of nutrient uptake-to-leaching in the agroforestry system than in the monocultures indicating a higher nutrient efficiency. The lower leaching losses in the agroforestry system compared to the crop monoculture could not compensate for the additional nutrient export in tree biomass. A nutrient return by mulching crop residues and acacia leaves was essential for a positive nutrient balance in the agroforestry system. Combining annual and perennial crops provided a higher internal nutrient cycling than the monocultures.

Acacia saligna nutrient balance nutrient leaching resin core soil solution Sorghum bicolor 

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References

  1. Aggarwal RK and Lahiri AN (1981) Evaluation of soil fertility status of stabilised and unstabilised dunes of the Indian desert. Agrochimica 25: 54–60Google Scholar
  2. Akondé TP, Kühne RF, Steinmüller N and Leihner DE (1997) Alley cropping on an Ultisol in subhumid Benin Part 3: nutrient budget of maize, cassava and trees. Agrofor Syst 37: 213–226CrossRefGoogle Scholar
  3. Amara DS, Sanginga N, Danso SKA and DS Suale (1996) Nitrogen contribution by multipurpose trees to rice and cowpea in an alley cropping system in Sierra Leone. Agrofor Syst 34: 119–128CrossRefGoogle Scholar
  4. Arnold D (1996) Modellierung und Optimierung eines Meßsystems zur Bestimmung der Nitratverlagerung in Böden mittels Ionenaustauscher. MSc Thesis, Institute of Hydrology, University of Bayreuth, Germany, 85 ppGoogle Scholar
  5. Buresh R and Tian G (1998) Soil improvement by trees in sub-Saharan Africa. Agrofor Syst 38: 51–76CrossRefGoogle Scholar
  6. DiStefano JF and Gholz JL (1986) A proposed use of anion exchange resin to measure nitrogen mineralization and nitrification in intact soil cores. Comm Soil Sci Plant Anal 17: 989–998Google Scholar
  7. FAO (1995) Soil map of the world, revised legend. FAO, Rome, Italy, 119 ppGoogle Scholar
  8. Grayston SJ, Vaughan D and Jones D (1996) Rhizosphere carbon flow in trees, in comparison with annual plants: the importance of root exudation and its impact on microbial activity and nutrient availability. Appl Soil Ecol 5: 29–56CrossRefGoogle Scholar
  9. Hagedorn F, Steiner KG, Sekayange L and Zech W (1997) Effect of rainfall pattern on nitrogen mineralization and leaching in a green manure experiment in South Rwanda. Plant Soil 195: 365–375CrossRefGoogle Scholar
  10. Haggar JP, Tanner EVJ, Beer JW and Kass DCL (1993) Nitrogen dynamics of tropical agroforestry and annual cropping systems. Soil Biol Biochem 25: 1363–1378CrossRefGoogle Scholar
  11. Hartemink AE, Buresh RJ, Bashir-Jama and Janssen BH (1996) Soil nitrate and water dynamics in sesbania fallow, weed fallow, and maize. Soil Sci Soc Am J 60: 568–574CrossRefGoogle Scholar
  12. Hübner C, Redl G and Wurst F (1991) In situ methodology for studying N-mineralization in soils using anion exchange resins. Soil Biol Biochem 23: 701–702CrossRefGoogle Scholar
  13. Huwe B and Totsche K (1995) Deterministic and stochastic modelling of water, heat and nitrogen dynamics on different scales with WHNSIM. J Contamin Hydr 20: 265–284CrossRefGoogle Scholar
  14. Jackson RO (1972) On the calculation of hydraulic conductivity. Soil Sci Soc Am Proc 36: 380–382CrossRefGoogle Scholar
  15. Kolberg RL, Rouppet B, Westfall DG and Peterson GA (1997) Evaluation of an in situ soil nitrogen mineralization method in dryland agroecosystems. Soil Sci Soc Am J 61: 504–508CrossRefGoogle Scholar
  16. Kühne RF (1993) Wasser-und Nährstoffhaushalt in Mais-Maniok-Anbausystemen mit und ohne Integration von Alleekulturen (‘Alley cropping’) in Süd-Benin. PhD Dissertation, University of Stuttgart Hohenheim, Germany, 244 ppGoogle Scholar
  17. Lehmann J and Zech W (1997) Möglichkeiten und Grenzen der Ertragssteigerung in tropischen Alley-cropping Systemen. In: JCG Ottow and J Sauerborn (eds) Leguminosen zur Verbesserung und nachhaltigen Sicherung der Agrarproduktion, pp 165–176. Gießener Beiträge zur Entwicklungsforschung Reihe I, Band 24. Giessen, GermanyGoogle Scholar
  18. Lehmann J and Zech W (1998) Fine root turnover in hedgerow intercropping in Northern Kenya. Plant Soil 198: 19–31CrossRefGoogle Scholar
  19. Lehmann J, Schroth G and Zech W (1995) Decomposition and nutrient release from leaves, twigs and roots of three alley-cropped tree legumes in central Togo. Agrofor Syst 29: 21–36CrossRefGoogle Scholar
  20. Lehmann J, Droppelmann K and Zech W (1998a) Runoff irrigation of crops with contrasting root and shoot development in the semi-arid North of Kenya: water depletion and above-and below-ground biomass production. J Arid Environm 38: 479–492CrossRefGoogle Scholar
  21. Lehmann J, Peter I, Steglich C, Gebauer G, Huwe B and Zech W (1998b) Below-ground interactions in dryland agroforestry. For Ecol Manage 111: 157–169CrossRefGoogle Scholar
  22. Lehmann J, Poidy N, Schroth G and Zech W (1998c) Short-term effects of soil amendment with legume tree biomass on carbon and nitrogen in particle size separates in central Togo. Soil Biol Biochem 30: 1545–1552CrossRefGoogle Scholar
  23. Lehmann J, von Willert F, Wulf S and Zech W (1998d) Influence of runoff irrigation on nitrogen dynamics of Sorghum bicolor(L.) in Northern Kenya. Advances in GeoEcology 31: 1255–1260Google Scholar
  24. Little TM and Hills FJ (1978) Agricultural Experimentation. Wiley and Sons, New York, USA, 350 ppGoogle Scholar
  25. Lövenstein HM, Berliner PR and van Keulen H (1991) Runoff agroforestry in arid lands. For Ecol Manage 45: 59–70CrossRefGoogle Scholar
  26. Mehlich A (1984) Mehlich 3 soil test extractant: A modification of the Mehlich 2 extractant. Comm Soil Sci Plant Anal 15: 1409–1416CrossRefGoogle Scholar
  27. Millington RJ and Quirk JP (1960) Transport in porous media. Int. Congr. Sci., Trans. 7th (Madison, Wisconsin) 1.3: 97–106Google Scholar
  28. Mokwunye AO and Hammond LL (1992) Myth and science about fertilizer use in the tropics. In: Lal R and Sanchez PA (eds) Myths and Scientific Realities of the Soils in the Tropics, pp 121–134. SSSA Special Publication 29, Madison, USAGoogle Scholar
  29. Nabhan G (1984) Soil fertility renewal and water harvesting in Sonoran desert agriculture: the Papago example. Arid Lands Newsletter, Tucson, Arizona, 20: 21–37Google Scholar
  30. Olsen SR and Sommers LE (1982) Phosphorus. In: Page AL, Miller RH and Keeney DR (eds) Methods of Soil Analyses: Part 2 Chemical and Microbiological Properties, pp 403–430. American Society of Agronomy, Madison, Wisconsin, USAGoogle Scholar
  31. Palm CA (1995) Contribution of agroforestry trees to nutrient requirements of intercropped plants. Agrofor Syst 30: 105–124CrossRefGoogle Scholar
  32. Priestley CHB and Taylor RJ (1972) On the assessment of surface heat flux and evaporation using large-scale parameters. Month Weath Rev 100: 81–92Google Scholar
  33. Rauschkolb RS and Hornsby AG (1994) Nitrogen Management in Irrigated Agriculture. Oxford University Press, New York, USA, 251 ppGoogle Scholar
  34. Salazar A, Szott LT and Palm CA (1993) Crop-tree interactions in alley cropping systems on alluvial soils of the Upper Amazon Basin. Agrofor Syst 22: 67–82CrossRefGoogle Scholar
  35. Sanchez PA (1976) Properties and Management of Soils in the Tropics. John Wiley and Sons, New York, USA, 618 ppGoogle Scholar
  36. Sanchez PA (1995) Science in Agroforestry. Agrofor Syst 30: 5–55CrossRefGoogle Scholar
  37. Seyfried and Rao PSC (1991) Nutrient leaching loss from two contrasting cropping systems in the humid tropics. Tropical Agric Trinidad 68: 9–18Google Scholar
  38. Torquebiau EF and Kwesiga F (1996) Root development in a Sesbania sesbanfallow-maize system in Eastern Zambia. Agrofor Syst 34: 193–211CrossRefGoogle Scholar
  39. Van Noordwijk M, Lawson G, Soumare A, Groot JJR and Hairiah K (1996) Root distribution of trees and crops: competition and/or complementarity. In: Ong CK and Huxley P (eds) Tree-Crop Interactions, pp 319–364. CAB International, Oxon, UKGoogle Scholar
  40. Wiesler F and Horst WJ (1994) Root growth and nitrate utilization of maize cultivars under field conditions. Plant Soil 163: 267–277CrossRefGoogle Scholar
  41. Wild A (1988) Russel’s Soil Conditions and Plant Growth. Longman, Essex, UK, 991 ppGoogle Scholar
  42. Wulf S, Lehmann J and Zech W (1999) Emissions of nitrous oxide from runoff-irrigated and rainfed soils in semiarid north-west Kenya. Agric Ecosys Environm 72: 201–205CrossRefGoogle Scholar

Copyright information

© Kluwer Academic Publishers 1998

Authors and Affiliations

  • J. Lehmann
    • 1
    Email author
  • D. Weigl
    • 1
  • K. Droppelmann
    • 2
  • B. Huwe
    • 3
  • W. Zech
    • 1
  1. 1.Institute of Soil Science and Soil GeographyUniversity of BayreuthBayreuthGermany
  2. 2.Blaustein InstituteUniversity of the NegevSde BoqerIsrael
  3. 3.Soil Physics GroupUniversity of BayreuthBayreuthGermany

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