Abstract
Two field experiments were performed to evaluate the nitrogen fixation potential of twenty common bean cultivars and breeding lines during summer and winter seasons of 1986 and 1988, respectively. The 15N isotope dilution method was used to quantify N2 fixation. The cultivars and breeding lines were variable in terms of their N2 fixation. The cv. Caballero was very efficient, with more than 50% N derived from the atmosphere and 60–80 kg N ha−1 fixed in both seasons. Other cultivars were less efficient, since the poorest ones derived less than 30% of their nitrogen from the atmosphere and fixed less than 20 kg N ha−1. After additional testing the best cultivars may be used directly by the farmers for cultivation. The experiments have provided information about which genotypes may be used to breed for enhanced fixation in common bean.
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Manrique, A., Manrique, K. & Nakahodo, J. Yield and biological nitrogen fixation of common bean (Phaseolus vulgaris L.) in Peru. Plant Soil 152, 87–91 (1993). https://doi.org/10.1007/BF00016336
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DOI: https://doi.org/10.1007/BF00016336