Abstract
In an alley cropping experiment, a study was carried out on N2 fixation by Gliricidia sepium, nitrogen (N) accumulation by prunings of Gliricidia, Senna siamea (formerly Cassia siamea) and Gmelina arborea, and the N contribution to associated crops of rice and cowpea.
Total N accumulated by the hedgerow trees ranged from 297–524 kg N ha−1 on average but varied between tree species and depended on the growing season. Gliricidia sepium accumulated 370 kg N ha−1 on average and more than half of this came from fixation. Senna siamea and Gmelina arborea served as reference trees for estimating N2 fixation. The estimates of N2 fixation using Gmelina as a reference gave higher estimates than those using Senna.
Although the dry matter and nitrogen yields of prunings from the hedgerow trees were high, their relative nitrogen contribution to the associated crops was generally low ranging from 5 to 29%. Higher crop yields and nitrogen contribution were observed with Gliricidia sepium prunings. The low N contribution from prunings was attributed to the lack of synchronization between the N released from the prunings and the crop's demand for N.
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References
Axmann H (1990) Methods for 15N determination. In: Hardarson G (ed) Use of Nuclear Techniques in Studies of Soil-Plant Relationships, pp 55–99. IAEA-TCS. 2. International Atomic Energy Agency, Vienna, Austria
Duguma B, Kang BT and Okali DUU (1988) Effect of pruning intensities of three woody leguminous species grown in alley cropping with maize and cowpea on an Alfisol. Agrofor Syst 6: 19–35
Danso SKA, Bowen GD and Sanginga N (1992) Biological Nitrogen Fixation in trees in agroecosystems. Plant and Soil 141: 177–196
Freed RD (1992) Statistical package for agronomic experiments version 2.0. Michigan State University
Fried M and Middelboe V (1977) Measurement of amount of nitrogen fixed by a legume. Plant and Soil 47: 713–715
Fried M, Danso SKA and Zapata F (1983) The methodology of measurement of N2 fixation by non-legumes as inferred from field experiment with legumes. Can J Microbiol 29: 1053–1062
Guevarra AB (1976) Management of Leucaena leucocephala (Lam.) de Wit for maximum yield and nitrogen contribution to intercropped corn. PhD thesis. Honolulu, Hawaii, University of Hawaii, USA, 128 pp
Kang BT, Wilson GF and Sipkens L (1981a) Alley cropping maize (Zea mays L.) and Leucaena (Leucaena leucocephala Lam. de Wit) in Southern Nigeria. Plant and Soil 5: 267–277
Kang BT, Silpken L, Wilson GF and Nangju D (1981b) Leucaena leucocephala (Lam.) de Wit prunings as nitrogen source for maize (Zea mays L.). Fert Res 2: 279–287
Ladd JN, Oades JM and Amato M (1981) Distribution and recovery of nitrogen from legume residues decomposing in soils sown to wheat in the field. Soil Biol Biochem 13: 251–256
Mulongoy K (1986) Potential of Sesbania rostrata (Bram.) as nitrogen source in alley cropping systems. Biology Agric Hortic 3: 341–346
Read MD, Kang BT and Wilson GF (1985) Use of Leucaena leacocephala (Lam.) de Wit leaves as a nitrogen source for crop production. Fert Res 8: 107–116
Rinaudo G, Dreyfus B and Dommergus YR (1982) Influence of Sesbania rostrata green manure on nitrogen content of rice crop and soil. Soil Biol Biochem 15: 111–113
Sanginga, N, Vanlauwe, B, and Danso, SKA (1993) Management of biological nitrogen fixation in alley cropping system: estimation and contribution to N balance. International Institute of Tropical Agriculture and International Atromic Energy Agency Working Paper, pp 7–8
Sanginga N, Mulongoy K and Ayanaba A (1986) Inoculation of Leucaena leucocephala (Lam.) de Wit with Rhizobium and its nitrogen contribution to a subsequent maize crop. Biol Agric Hortic 3: 34–347
Simpson JR (1976) Transfer of nitrogen from three pasture legumes under periodic defoliation in a field environment. Aust J Exp Agric Anim Husb 16: 863–870
Van der Meersch MK (1993) Evolution of plant biomass and nutrient content in relation to soil fertility changes in two alley cropping systems. In: Mulongoy K and Merckx R (eds) Soil Organic Matter Dynamics and Sustainability of Tropical Agriculture, pp 143–154. John Wiley and Sons, Chichester, UK
Wilson GF, Kang BT and Mulongoy K (1986) Tree cropping: Trees as a source of green manure and mulch in the tropics. Biol Agric Hortic 3: 251–267
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Amara, D.S., Sanginga, N., Danso, S.K.A. et al. Nitrogen contribution by multipurpose trees to rice and cowpea in an alley cropping system in Sierra Leone. Agroforest Syst 34, 119–128 (1996). https://doi.org/10.1007/BF00148156
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DOI: https://doi.org/10.1007/BF00148156