Nitrogen fixation in seven groundnut genotypes was measured by 15N-isotope dilution using a non-nodulating cultivar of groundnut as the nonfixing reference plant. Nitrogen fixation varied between 100 kg N ha−1 in genotype J-11 and 153 kg N ha−1 in Robut 33-1. The amount of plant-available soil N was small, so that 86%–92% of plant nitrogen was derived from N2-fixation. Thus differences in N2-fixation between genotypes closely reflected differences in their total N accumulation.
This is a preview of subscription content, access via your institution.
Buy single article
Instant access to the full article PDF.
Price includes VAT (USA)
Tax calculation will be finalised during checkout.
Anon (1978) Analysis of crops, soils and fertilizers. Soil and Plant Nutrition Department, Rothamsted Experimental Station, Harpenden, England
Arunachalam V, Pungle GD, Dutta M, Nambiar PTC, Dart PJ (1984) Efficiency of nitrogenase activity and nodule mass in predicting the relative performance of genotypes assessed by a number of characters in groundnut (Arachis hypogaea). Exp Agric 20:303–310
Conway EJ (1939) Microdiffusion analysis and volumetric error. Crosby Lockwood, London
Elkan GH, Wynne JC, Schneeweis JJ, Isleib TG (1980) Nodulation and nitrogenase activity of peanuts isolated with single strain isolates of Rhizobium. Peanut Sci 7:95–97
ICRISAT (1981) Annual report. ICRISAT, Patancheru A. P., India, p 187
ICRISAT (1982) Annual report. ICRISAT, Patancheru A. P., India, p 249
Nambiar PTC, Rego TJ, Srinivasa Rao B (1986) Comparison of the requirements and utilization of nitrogen by genotypes of sorghum (Sorghum bicolor (L.) Moench), and nodulating and nonnodulating groundnut (Arachis hypogaea L.). Field Crops Res 15:165–179
Nambiar PTC, Dart PJ (1980) Studies on nitrogen fixation in groundnut at ICRISAT. In: Gibbons RW (ed) Proceedings of the International Symposium on the Groundnut, ICRISAT, Patancheru A. P., India, pp 110–124
Nambiar PTCN, Dart PJ, Srinivasa Rao B, Ravi-Shankar HN (1982) Response of groundnut (Arachis hypogaea) to inoculation. In: Graham PH, Harris S (eds) Biological nitrogen fixation technology for tropical agriculture. CIAT, Cali, Colombia, pp 241–248
Witty JF (1983) Estimating N2-fixation in the field using ESN-labelled fertilizer: some problems and solutions. Soil Biol Biochem 15:631–639
ICRISAT Journal Article no. 600
About this article
Cite this article
Giller, K.E., Nambiar, P.T.C., Srinivasa Rao, B. et al. A comparison of nitrogen fixation in genotypes of groundnut (Arachis hypogaea L.) using 15N-isotope dilution. Biol Fert Soils 5, 23–25 (1987). https://doi.org/10.1007/BF00264341
- Arachis hypogaea
- 15N isotope dilution
- Rhizobium inoculation
- Plant available soil N