Nitrogen-fixation dynamics in a cut-and-carry silvopastoral system in the subhumid conditions of Guadeloupe, French Antilles
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This paper summarizes several studies on N recycling in a tropical silvopastoral system for assessing the ability of the system to increase soil fertility and insure sustainability. We analyzed the N2 fixation pattern of the woody legume component (Gliricidia sepium), estimated the recycling rate of the fixed N in the soil, and measured N outputs in tree pruning and cut grass (Dichanthium aristatum). With this information, we estimated the N balance of the silvopastoral system at the plot scale. The studies were conducted in an 11-year-old silvopastoral plot established by planting G. sepium cuttings at 0.3 m × 2 m spacing in natural grassland. The plot was managed as a cut-and-carry system where all the tree pruning residues (every 2-4 months) and cut grass (every 40-50 days) were removed and animals were excluded. No N fertilizer was applied. Dinitrogen fixation, as estimated by the 15N natural abundance method, ranged from 60-90% of the total N in aboveground tree biomass depending on season. On average, 76% of the N exports from the plot in tree pruning (194 kg [N] ha–1 yr–1) originated from N2 fixation. Grass production averaged 13 Mg ha–1 yr–1 and N export in cut grass was 195 kg [N] ha–1 yr–1. The total N fixed by G. sepium, as estimated from the tree and grass N exports and the increase in soil N content, was about 555 kg [N] ha–1 yr–1. Carbon sequestration averaged 1.9 Mg [C] ha–1 yr–1 and soil organic N in the 0-0.2 m layer increased at a rate of 166 kg [N] ha–1 yr–1, corresponding to 30% of N2 fixation by the tree. Nitrogen released in nodule turnover (10 kg [N] ha–1 yr–1) and litter decomposition (40 kg [N] ha–1 yr–1) contributed slightly to this increase, and most of the recycled N came from the turnover or the activity of other below-ground tree biomass than nodules.
- Archimède H., Dulormne M., Tournebize R., Saminadin G., Periacarpin F. and Xand' A.2001. The effects of Gliricidia sepium supplementation on intake and digestion of Digitaria decumbens hay by black belly sheep.J. Agric. Sci.137: 105–112. CrossRef
- Arnebrandt K., Ek H., Finlay R.D. and Söderström B.1993. Nitrogen translocation between Alnus glutinosa (L.) Gaertn. seedlings inoculated with Frankia sp. and Pinus contorta Doug. ex Loud seedlings connected by a common ectomycorrhizal mycelium.New Phytol.130: 231–242. CrossRef
- Brophy L.S., Heichel G.H. and Russelle M.P.1987. Nitrogen transfer from forage legumes to grass in a systematic planting design.Crop. Sci.27: 753–758. CrossRef
- Catchpoole D.W. and Blair G.J.1990. Forage tree legumes III. Release of nitrogen from leaf, faeces and urine derived from leucaena and gliricidia leaf.Aust. J. Agric. Res.41: 539–547. CrossRef
- Domenach A.M., Kurdali F. and Bardin R.1989. Estimation of symbiotic dinitrogen fixation in alder forest by the method based on natural 15N abundance.Plant Soil.118: 51–59. CrossRef
- Dulormne M.2001. Analyse de l'effet ombrage dans un système agroforestier l'gumineuse arbustive-herbe. Ph. D. thesis, University Paris Sud, France, 120 pp.
- García H., Nygren P. and Desfontaines L.2001. Dynamics of non-structural carbohydrates and biomass yield in a fodder legume tree under different harvest intensities.Tree Physiol.21: 523–531.
- Kanninen M.2001. Secuestro de carbono en bosques: el papel de los bosques en el ciclo global de carbono. In: II Conferencia Electrónica FAO-CIPAV sobre Agroforestería para la Producción Animal en Latinoam'rica.http://www.lead-es.virtualcentre.org.
- Kass D.C.L., Sylvester-Bradley R. and Nygren P.1997. The role of nitrogen fixation and nutrient supply in some agroforestry systems of the Americas.Soil. Biol. Biochem.29: 775–785. CrossRef
- Ladha J.K., Peoples M.B., Garrity D.P., Capuno V.T. and Dart P.J.1993. Estimating dinitrogen fixation of hedgerow vegetation using the nitrogen-15 natural abundance method.Soil Sci. Soc. Am. J.57: 732–737. CrossRef
- Liyanage M. de S., Danso S.K.A. and Jayasundara H.P.S.1994. Biological nitrogen fixation in four Gliricidia sepium genotypes.Plant Soil.161: 267–274. CrossRef
- Nygren P. and Cruz P.1998. Biomass allocation and nodulation of Gliricidia sepium under two cut-and-carry forage production regimes.Agrofor. Syst.41: 277–292. CrossRef
- Nygren P., Cruz P., Domenach A.M., Vaillant V. and Sierra J.2000a. Influence of forage harvesting regimes on dynamics of biological dinitrogen fixation of a tropical woody legume.Tree Physiol.20: 41–48.
- Nygren P., Lorenzo A. and Cruz P.2000b. Decomposition of woody legume nodules in two tree/grass associations under contrasting environmental conditions.Agrofor. Syst.48: 229–244. CrossRef
- Peoples M.B., Palmer B., Lilley D.M., Duc L.M. and Herridge D.F.1996. Application of 15N and xylem ureide methods for assessing N2 fixation of three shrub legumes periodically pruned for forage.Plant Soil.182: 125–137. CrossRef
- Postgate J.1987. Nitrogen fixation, 2nd ed.Edward Arnold, London, UK, 73 pp.
- Rao A.V. and Giller K.E.1993. Nitrogen fixation and its transfer from Leucaena to grass using 15N. For.Ecol. Manage.61: 221–227. CrossRef
- Ruhigwa B.A., Gichuru M.P., Mambani B. and Tariah N.M.1992. Root distribution of Acioa barteri, Alchornea cordifolia, Cassia siamea and Gmelina arborea in an acid Ultisol.Agrofor. Syst.19: 67–78. CrossRef
- Russelle M.P., Allan D.L. and Gourly C.J.P.1994. Direct assessment of symbiotically fixed nitrogen in the rhizosphere of alfalfa.Plant Soil159: 223–243. CrossRef
- Schroth G and Zech W.1995. Root length dynamics in agroforestry with Gliricidia sepium as compared to sole cropping in the semi-deciduous rainforest zone of West Africa.Plant Soil.170: 297–306. CrossRef
- Shearer G and Kohl D.H.1986. N2 fixation in field settings: estimations based on natural 15N abundance.Aust. J. Plant Physiol.13: 699–756.
- Sierra J., Dulormne M. and Desfontaines L.2002. Soil nitrogen as affected by Gliricidia sepium in a silvopastoral system in Guadeloupe, French Antilles.Agrofor. Syst.54: 87–97. CrossRef
- Simard S.W., Perry D.A., Jones M.D., Myrold D.D., Durall D.M. and Molina R.1997. Net transfer of carbon between ectomycorrhizal tree species in the field.Nature388: 579–582. CrossRef
- Snoeck D., Zapata F. and Domenach A.M.2000. Isotopic evidence of the transfer of nitrogen fixed by legumes to coffee trees.Biotechnol. Agron. Soc. Environ.4: 95–100.
- Wittingham J. and Read D.J.1982. Vesicular-arbuscular mycorrhiza in natural vegetation systems III. Nutrient transfer between plants with mycorrhizal connections.New Phytol.90: 277–284. CrossRef
- Nitrogen-fixation dynamics in a cut-and-carry silvopastoral system in the subhumid conditions of Guadeloupe, French Antilles
Volume 59, Issue 2 , pp 121-129
- Cover Date
- Print ISSN
- Online ISSN
- Kluwer Academic Publishers
- Additional Links
- Carbon sequestration
- Gliricidia sepium
- Nitrogen balance
- 15N natural abundance
- tree roots
- Author Affiliations
- 1. Unité Agropédoclimatique de la Zone Caraïbe, Domaine Duclos, INRA, 97170, Petit-Bourg, Guadeloupe, France
- 2. Center for Agroforestry, University of Missouri-Columbia, 203 Natural Resources Bldg, Columbia, MO, 65211, USA
- 3. Station d'Agronomie de Toulouse, INRA, BP 27, 31326, Castanet-Tolosan, France