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Plant and Soil

, Volume 188, Issue 2, pp 319–327 | Cite as

Root and inorganic nitrogen distributions in sesbania fallow, natural fallow and maize fields

  • Kindu Mekonnen
  • Roland J. Buresh
  • Bashir Jama
Article

Abstract

One hypothesis for a benefit of integrating trees with crops is that trees with deep root systems can capture and “pump up” nutrients from below the rooting zone of annual crops. Few studies have compared both root and nutrient distribution for planted trees, crops and grassland vegetation. A field study was conducted on a Kandiudalfic Eutrudox in the highlands of western Kenya to measure rooting characteristics and distribution of inorganic N and water in three land-use systems (LUS): (i) Sesbania sesban (L.) Merr. fallow, (ii) uncultivated natural weed fallow and (iii) unfertilized maize (Zea mays L.) monoculture. The maximum rooting depth was 1.2 m in the maize LUS, 2.25 m in a 13-month-old natural fallow, and > 4 m in a 15-month-old sesbania fallow. Total root length was 1.26 km m-2 for the maize LUS, 5.98 km m-2 for the natural fallow, and 4.56 km m-2 to 4 m for the sesbania fallow. Root length to 1.2 m was greater (p < 0.01) for natural fallow than for maize and sesbania fallow. A considerable portion of the sesbania root length to 4 m was in the subsoil; 47% was at 1.2 to 4 m and 31% was at 2.25 to 4 m. Deep rooting of sesbania coincided with lower soil water below 2 m in the sesbania fallow than the natural fallow. Nitrate-N, but not ammonium-N, to 4 m was affected by LUS. Total nitrate to 4 m was 199 kg N ha-1 for the maize LUS, 42 kg N ha-1 for the natural fallow and 51 kg N ha-1 for the sesbania fallow. Soil nitrate in the maize LUS was highest at 0.3 to 1.5-m depth on this Oxisol with anion sorption capacity. No such accumulation of subsoil nitrate was present under sesbania and natural fallow.

agroforestry fallow maize nitrate root distribution root length density root to shoot ratio Sesbania sesban 

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References

  1. Anderson J M and Ingram J S I 1993 Tropical Soil Biology and Fertility. A Handbook of Methods. Second edition. CAB International, Wallingford, Oxon. UK. 221 p.Google Scholar
  2. Atkinson D 1980 The distribution and effectiveness of the roots of tree crops. InHorticultural Reviews. Ed. J Janick. pp 424-490. AVI Publishing Company, Westport, Connecticut.Google Scholar
  3. Buresh R J 1995 Nutrient cycling and nutrient supply in agroforestry systems. InIntegrated Plant Nutrition Systems. Eds. R Dudal and R N Roy. pp 155-164. FAO fertilizer and plant nutrition bulletin no 12, Rome.Google Scholar
  4. De Willigen P and van Noordwijk M 1989 Rooting depth, synchronization, synlocalization and N-use effciency under humid tropical conditions. InNutrient Management for Food Crop Production in Tropical Farming Systems. Ed. J van der Heide. pp 145-156. Institute for Soil Fertility, Haren.Google Scholar
  5. Dhyani S K, Narain P and Singh R K 1990 Studies on root distribution of five multipurpose tree species in Doon Valley, India. Agrofor. Syst. 12, 149-161.Google Scholar
  6. Dorich R A and Nelson D W 1984 Evaluation of manual cadmium reduction methods for determination of nitrate in potassium chloride extract of soil. Soil Sci. Soc, Am. J. 48, 72-75.Google Scholar
  7. Eastham J and Rose C W 1990 Tree/pasture interactions at a range of tree densities in an agroforestry experiment. I. Rooting patterns. Aust. J. Agric. Res. 41, 683-695.Google Scholar
  8. Gomez K A and Gomez A A 1984 Statistical Procedures for Agricultural Research. Second edition. John Wiley and Sons, New York. 680 p.Google Scholar
  9. Harris G A and Campbell G S 1989 Automated quantification of roots using a simple image analyzer. Agron. J. 81, 935-938.Google Scholar
  10. Hartemink A E, Buresh R J, Bashir Jama and Janssen B H 1996 Soil nitrate and water dynamics in sesbania fallow, weed fallows, and maize. Soil Sci. Soc. Am. J. 60, 568-574.Google Scholar
  11. Hilsheimer R and Harwig J 1976 Colorimetric determination of nitrate from meat and other foods: An alternative colour reagent for the carcinogenic 1-naphtylamine and an improved extraction method. Can. Inst. Food Sci. Technol. J. 9, 225-227.Google Scholar
  12. IAEA 1975 Root Activity Patterns of Some Tree Crops. Technical Report Series No. 170. Joint FAO/IAEA Division of Atomic Energy in Food and Agriculture. International Atomic Energy Agency, Vienna.Google Scholar
  13. Jones M J 1976 Water movement and nitrate leaching in a Nigerian savanna soil. Exp. Agric. 12, 69-79.Google Scholar
  14. Jonsson K, Fidjeland L, Maghembe J A and Hogberg P 1988 The vertical distribution of fine roots of five tree species and maize in Morogoro, Tanzania. Agrofor. Syst. 6, 63-69.Google Scholar
  15. Kirchhof G 1992 Measurement of root length and thickness using a hand-held computer scanner. Field Crops Res. 29, 79-88.Google Scholar
  16. Kwesiga F and Coe R 1994 The effect of short rotation Sesbania sesban planted fallows on maize yield. For. Ecol. Manage. 64, 199-208.Google Scholar
  17. Mazzarino M J, Oliva L, Abril A and Acosta M 1991 Factors affecting nitrogen dynamics in a semiarid woodland (Dry Chaco, Argentina). Plant Soil 138, 85-98.Google Scholar
  18. Mengel D B and Barber S A 1974 Development and distribution of the corn root system under field conditions. Agron. J. 66, 341- 345.Google Scholar
  19. Newman E I 1966 A method for estimating the total length of root in a sample. J. Appl. Ecol. 3, 139-145.Google Scholar
  20. Robertson W H 1994 Modelling soil nitrogen levels under acacia/ sorghum rotations. Agrofor. Syst. 27, 283-292.Google Scholar
  21. Ruhigwa B A, Gichuru M P, Mambani B and Tariah N M 1992 Root distribution of Acioa barteri, Alchornea cordifolia, Cassia siameaand Gmelina arboreain an acid Ultisol. Agrofor. Syst. 19, 67-78.Google Scholar
  22. SAS Institute 1989 SAS/STAT User Guide, Version 6, Volume 2, Fourth edition. SAS Institute Inc., Cary, NC, USA. 846 p.Google Scholar
  23. Schroth G 1995 Tree root characteristics as criteria for species selection and systems design in agroforestry. Agrofor. Syst. 30, 125- 143.Google Scholar
  24. Seyfried M S and Rao P S C 1991 Nutrient leaching loss from two contrasting cropping systems in the humid tropics. Trop. Agric. Trinidad 68, 9-18.Google Scholar
  25. Stone E L and Kalisz P J 1991 On the maximum extent or tree roots. For. Ecol. Manage. 46, 59-102.Google Scholar
  26. Toky O P and Bisht R P 1992 Observations on rooting patterns of some agroforestry trees in an arid region of north-western India. Agrofor. Syst. 18, 245-263.Google Scholar
  27. Van Noordwijk M 1989 Rooting depth in cropping systems in the humid tropics in relation to nutrient use efficiency. InNutrient Management for Food Crop Production in Tropical Farming Systems. Ed. J van der Heide. pp 129-144. Institute for Soil Fertility, Haren, The Netherlands.Google Scholar
  28. Van Noordwijk M, Widianto, Heinen M and Hairiah Kurniatun 1991 Old tree root channels in acid soils in the humid tropics: Important for crop root penetration, water infiltration and nitrogen management. Plant Soil 134, 37-44.Google Scholar
  29. Van Rees K C J and Comerford N B 1986 Vertical root distribution and strontium uptake of a slash pine stand on a Florida spodosol. Soil Sci. Soc. Am. J. 50, 1042-1046.Google Scholar
  30. Wiesler F and Horst W J 1993 Differences among maize cultivars in the utilization of soil nitrate and the related losses of nitrate through leaching. Plant Soil 151, 193-203.Google Scholar
  31. Wild A 1972 Nitrate leaching under bare fallow at a site in northern Nigeria. J. Soil Sci. 23, 315-324.Google Scholar
  32. Wong M T F, Wild A and Juo A S R 1987 Retarded leaching of nitrate measured in monolith lysimeters in south-east Nigeria. J. Soil Sci. 38, 511-518.Google Scholar

Copyright information

© Kluwer Academic Publishers 1997

Authors and Affiliations

  • Kindu Mekonnen
    • 1
  • Roland J. Buresh
    • 1
  • Bashir Jama
    • 1
  1. 1.International Centre for Research in Agroforestry (ICRAF)NairobiKenya

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