N2-fixation in tropical American savannas evaluated by the natural abundance of 15N in plant tissues and soil organic matter

Tropical Ecology

Volumn 45, Issue 1 SPEC. ISS., 2004, Pages 87-95

  Medina, E ^a   Izaguirre, M L ^a  

^a INSTITUTO VENEZOLANO DE INVESTIGACIONES CIENTÍFICAS   (Venezuela)

Author keywords

15N; Legumes; N2 fixation; Tropical savannas; Ureides

Indexed keywords

BIOACCUMULATION; LEGUME; NITROGEN FIXATION; SAVANNA; SOIL ORGANIC MATTER;

SOUTH AMERICA; VENEZUELA; WESTERN HEMISPHERE; WORLD;

BACTERIA (MICROORGANISMS); CYPERACEAE; TRACHYPOGON;

EID: 8844226818     PISSN: 05643295     EISSN: None     Source Type: Journal    
DOI: None     Document Type: Article

References (30)

1. Abbadie, L., A. Mariotti & J.-C. Menaut. 1992. Independence of savanna grasses from soil organic matter for their nitrogen supply. Ecology 73: 608-613.
2. Balandreau, J., R. N'Dri Allou, G. Villemin, P. Weinhard & P. Villecourt. 1976. Fixation rhizosphérique de l'azote en Savane de Lamto. Revue d' Ecologie et Biologie du Sol 13: 529-544.
3. Barrios, S. & V. Gonzalez. 1971. Rhizobial symbiosis on Venezuelan savannas. Plant and Soil 34: 707-719.
4. Berkum van, P. & J.M. Day. 1980. Nitrogenase activity associated with soil cores of grasses in Brazil. Soil Biology and Biochemistry 12: 137-140.
5. Boddey, R.M. & J. Döbereiner. 1995. Nitrogen fixation associated with grasses and cereals: recent progress and perspectives for the future. Fertilizer Research 42: 241-250.
6. Chacón, P., I.D. López-Hernández & M. Lamotte. 1991. Le cycle de l'azote dans une savane à Trachypogon au centre du Venezuela. Revue d' Ecologie et Biologie du Sol 28: 67-75.
7. Giller, K. E. & J.M. Day. 1985. Nitrogen fixation in the rhizosphere: significance in natural and agricultural systems. pp. 127-147. In: A.H. Fitter (ed.) Ecological Interactions in Soils. Blackwell Scientific Publishers, London.
8. 13C patterns in savanna vegetation: dependence on water availability and disturbance. Functional Ecology 8: 306-314.
9. 14N ratios of plants in South Africa and Namibia: relationship to climate and coastal/saline environments. Oecologia 74: 236-246.
10. 15N abundance methods. Plant Physiology 93: 708-716.
11. 15N abundance and foliar analysis. Journal of Ecology 83: 217-224.
12. 2-fixation, non-structural carbohydrates and chlorophyll content in sixteen native legume species collected in different savanna sites. Symbiosis 12: 293-312.
13. Jackson, M. L. 1964 Análisis Químico de Suelos. Ed. Omega. Barcelona.
14. 2-fixation (acetylene reduction) in some grassland ecosystems in Zimbabwe. Soil Biology and Biochemistry 19: 7-12.
15. Mariotti, A., F. Mariotti, N. Amarger, G. Pizelle, J.-M. Ngambi, M.L. Champigny & A. Moyse. 1980. Fractionements isotopiques de l'azote lors des processus d'absorption des nitrates et de fixation de l'azote atmosphérique par les plantes. Physiologie Vegetal 18: 163-181.
16. Medina, E. 1982. Nitrogen balance in the Trachypogon grasslands of central Venezuela. Plant and Soil 67: 305-314.
17. Medina, E. 1996. Biodiversity and nutrient relations in savanna ecosystems: interactions between primary producers, soil microorganisms and soils. pp. 45-57. In: O.T. Solbrig, E. Medina & J. Silva (eds.) Biodiversity and Savanna Ecosystem Processes. Ecological Studies 121. Springer Verlag Berlin.
18. Medina, E. & B. Bilbao. 1991. Significance of nutrient relations and symbiosis for the competitive interaction between grasses and legumes in tropical savannas. pp. 295-320. In: G. Esser & D. Overdieck (eds.) Modern Ecology: Basic and Applied Aspects. Elsevier Publishing Company. Amsterdam.
19. Medina, E. & O. Huber. 1992. The role of biodiversity in the function of savanna ecosystems. pp. 139-158. In: O.T. Solbrig, H.M. van Emden & P.G. W.J. van Oordt (eds.) Biodiversity and Global Change. International Union of Biological Sciences, Monograph No. 8, Paris.
20. 2-fixing abilities of component species. Plant, Cell and Environment 16: 365-373.
21. Santaella, S.E. 1985. Fijación Biológica de Nitrógeno en Sabanas de Trachypogon spp. Trabajo Especial de Grado. Escuela de Biología, Universidad Central de Venezuela. Caracas.
22. Schulze, E.-D., G. Gebauer, H. Ziegler & O.L. Lange. 1991. Estimates of nitrogen fixation by trees on an aridity gradient in Namibia. Oecologia 88: 451-455.
23. 15N abundance. Australian Journal of Plant Physiology 13: 699-755.
24. Shearer, G., D.H. Kohl & S. Chien. 1978. The nitrogen-15 abundance in a wide variety of soils. Soil Science Society of America Journal 42: 899-902.
25. 2-fixation and physiological performance of thirty-six native legume species collected in a tropical savanna during the rainy and dry seasons. Symbiosis 16: 225-247.
26. 13C in nodulated legumes and other plants in the cerrado and neighbouring regions of Brazil. Oecologia 105: 440-446.
27. 2-fixing plants from selected ecosystems. Oecologia 54: 317-325.
28. 2 fixation in the Legume-Rhizobia symbiotic system. Plant and Cell Physiology 27: 791-799.
29. 15N in tropical plants with emphasis on tree legumes. Plant and Soil 153: 295-304.
30. Zietsman, P.C., N. Grobbelaar & N. van Rooyen. 1988. Soil nitrogenase activity of the Nylsvlei Nature Reserve. South African Journal of Botany 54: 21-27.