Abstract
This study tested the hypothesis that incorporation of green leaf manure (GLM) from leguminous trees into agroforestry systems may provide a substitute for inorganic N fertilisers to enhance crop growth and yield. Temporal and spatial changes in soil nitrogen availability and use were monitored for various cropping systems in southern Malawi. These included Gliricidia sepium (Jacq.) Walp. trees intercropped with maize (Zea mays L.), with and without pigeonpea (Cajanus cajan L.), sole maize, sole pigeonpea, sole gliricidia and a maize + pigeonpea intercrop. Soil mineral N was determined before and during the 1997/1998, 1998/1999 and 1999/2000 cropping seasons. Total soil mineral N content (NO3− + NH4+) was greatest in the agroforestry systems (p<0.01). Pre-season soil mineral N content in the 0–20 cm horizon was greater in treatments containing trees (≤85 kg N ha−1) than in those without (<60 kg ha−1; p<0.01); however, soil mineral N content declined rapidly during the cropping season. Uptake of N was substantially greater in the agroforestry systems (200–270 kg N ha−1) than in the maize + pigeonpea and sole maize treatments (40–95 kg N ha−1; p<001). Accumulation of N by maize was greater in the agroforestry systems than in sole maize and maize + pigeonpea (p<0.01); grain accounted for 55% of N uptake by maize in the agroforestry systems, compared to 41–47% in sole maize and maize + pigeonpea. The agroforestry systems enhanced soil fertility because mineralisation of the applied GLM increased pre-season soil mineral N content. However, this could not be fully utilised as soil N declined rapidly at a time when maize was too small to act as a major sink for N. Methods for reducing losses of mineral N released from GLM are therefore required to enhance N availability during the later stages of the season when crop requirements are greatest. Soil mineral N levels and maize yields were similar in the gliricidia + maize and gliricidia + maize + pigeonpea treatments, implying that addition of pigeonpea to the tree-based system provided no additional improvement in soil fertility.
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References
E. Barrios F. Kwesiga R.J. Buresh J.I. Sprent R. Coe (1998) ArticleTitleRelating pre-season soil nitrogen to maize yield in tree legume-maize rotations Soil Sci. Soc. Am. J. 62 1604–1609 Occurrence Handle1:CAS:528:DyaK1MXjslyguw%3D%3D
P.W. Chirwa (2002) Water and Nutrient Interactions in Agroforestry Systems: A Comparison of Intercropping Systems with Maize in Malawi University of Nottingham UK 213
P.W. Chirwa C.R. Black J.A. Maghembe C.K. Ong (2003) ArticleTitleTree and crop productivity in gliricidia/maize/pigeonpea cropping systems in southern Malawi Agroforest. Sys. 59 267–277
R.A. Dorich D.W. Nelson (1984) ArticleTitleEvaluation of manual cadmium reduction methods for determination of nitrate on potassium chloride extracts of soils Soil Sci. Soc. Am. J. 48 72–75 Occurrence Handle1:CAS:528:DyaL2cXhtF2rt7Y%3D
K.E. Giller G. Cadisch (1997) Driven by nature: a sense of arrival or departure K.E. Giller G. Cadisch (Eds) Driven by Nature: Plant Litter Quality and Decomposition CAB International Wallingford, UK 393–399
Giller K.E., Cadisch G., Ehaliotis C., Adams E., Sakala W.D. and Mafongoya P.L. 1997. Building soil nitrogen capital in Africa. In: Buresh R.J., Sanchez P.A. and Calhoun F. (eds), Replenishing Soil Fertility in Africa. Soil Science Society of America, pp.150–192. Special Publication Number 51..
E. Handayanto G. Cadisch K.E. Giller (1995) ArticleTitleManipulation of quality and mineralisation of tropical legume tree prunings by varying nitrogen supply Plant Soil 176 149–160 Occurrence Handle10.1007/BF00017685 Occurrence Handle1:CAS:528:DyaK2MXot1Olu78%3D
S.T. Ikerra J.A. Maghembe P.C. Smithson R.J. Buresh (1999) ArticleTitleSoil nitrogen dynamics and relationships with maize yields in a gliricidia–maize intercrop in Malawi Plant Soil 211 155–164 Occurrence Handle10.1023/A:1004636501488 Occurrence Handle1:CAS:528:DyaK1MXntlKisL4%3D
S.T. Ikerra J.A. Maghembe P.C. Smithson R.J. Buresh (2001) ArticleTitleDry season Sesbania fallows and their influence on nitrogen availability and maize yields in Malawi Agroforest. Sys. 52 13–21
Itimu O.A. 1997. Nitrogen Dynamics and Root Distribution of Gliricidia sepium and Senna spectabilis in Maize (Zea mays) Based Alley Cropping Systems in Malawi. PhD thesis, University of London, UK..
Keeny D.R. and Nelson D.W. 1982. Nitrogen: Inorganic forms. In: Page A.L., Miller R.H. and Keeny D.R. (eds)., Methods of Soil Analysis: Part 2 – Chemical and Microbiological Properties, 2nd ed. ASA and SSSA, Madison, Wisconsin, USA, pp. 643–698. Agronomy No. 9. (Part 2).
J.A. Maghembe P.W. Chirwa G. Kooi S. Ikerra (1997) SADC-ICRAF Annual Report 1997 Makoka Agricultural Research Station Malawi
D.N. Mugendi P.K.R. Nair J.N. Mugwe M.K. O’Neill P.L. Woomer (1999a) ArticleTitleAlley cropping of maize with calliandra and leucaena in the subhumid highlands of Kenya Part 1: Soil fertility changes and maize yield Agroforest. Sys. 46 39–50
D.N. Mugendi P.K.R. Nair J.N. Mugwe M.K. O’Neill M.J. Swift P.L. Woomer (1999b) ArticleTitleAlley cropping of maize with calliandra and leucaena in the subhumid highlands of Kenya Part 2: Biomass decomposition, N mineralisation, and N uptake by maize Agroforest. Sys. 46 51–64
K.A. Oglesby J.H. Fownes (1992) ArticleTitleEffects of chemical composition on nitrogen mineralisation from green manures of seven tropical leguminous trees Plant Soil 143 127–132 Occurrence Handle10.1007/BF00009137 Occurrence Handle1:CAS:528:DyaK38XkvV2ntrY%3D
J.K. Okogun N. Sanginga K. Mulongoy (2000) ArticleTitleNitrogen contribution of five leguminous trees and shrubs to alley cropped maize in Ibadan, Nigeria Agroforest. Sys. 50 123–136
Palm C.A., Myers F.J.K. and Nandwa S.M. 1997. Combined use of organic and inorganic nutrient sources for soil fertility maintenance and replenishment: Building soil nitrogen capital in Africa. In: Buresh R.J., Sanchez P.A. and Calhoun F. (eds), Replenishing Soil Fertility in Africa. Soil Science Society of Americapp. 193–217. Special Publication 51.
H.S.K. Phombeya (1999) Nutrient Sourcing and Recycling by Faidherbia albida Trees in Malawi University of London UK
M.R. Rao A. Niang B. Duguma S. Franzel B. Jama R. Buresh (1998) ArticleTitleSoil fertility replenishment in sub-Saharan Africa: New techniques and the spread of their use on farms Agroforest. Today 10 3–8
E.C. Rowe K. Hairiah K.E. Giller M. Noordwijk Particlevan G. Cadisch (1999) ArticleTitleTesting the safety net role of hedgerow tree roots by 15N placement at different soil depths Agroforest. Sys. 43 81–93
W.D. Sakala (1998) Crop Management Interventions in Traditional Maize/Pigeonpea Intercropping Systems in Malawi University of London UK
M. Noordwijk Particlevan K. Hairiah B. Lusiana G. Cadisch (1997) Tree–Soil–Crop interactions in sequential an simultaneous agroforestry systems L. Bergstrom H. Kirchmann (Eds) Carbon and Nutrient Dynamics in Natural and Agricultural Tropical Ecosystems CAB Inaternational Wallingford 175–192
W. Ventura I. Watanabe (1978) ArticleTitleDry season soil conditions and soil nitrogen availability to wet season wetland rice Soil Sci. Plant Nutr. 24 535–545 Occurrence Handle1:CAS:528:DyaE1MXhvVGmt7k%3D
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Chirwa, P.W., Black, C.R., Ong, C.K. et al. Nitrogen Dynamics in Cropping Systems in Southern Malawi Containing Gliricidia sepium, Pigeonpea and Maize. Agroforest Syst 67, 93–106 (2006). https://doi.org/10.1007/s10457-005-0949-z
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DOI: https://doi.org/10.1007/s10457-005-0949-z