Una estrategia para mejorar la fijacion de nitrogeno
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The different stages of a technique developed by CIAT to increase the N fixation of beans are indicated. In stage 1L, the effectivity of native rhizobial strains is assessed; bean nodulation and N fixation are recorded. In stage 1R , rhizobial strains are isolated, purified, authenticated in the lab. As a result, 50 rhizobial strains have been isolated and inoculants prepared. In stage 2, genotype/soil combinations are studied to improve the effectivity of symbiosis through (1) inoculation, which improves the strain component, and (2) plant breeding to increase plant N-fixing capacity. Stage 3 involves on-farm testing of these improved combinations and stage 4 consists of the release and commercialization of the inoculants. Brief reference is made to results obtained in Colombia and El Salvador using this technique. (CIAT)
Palabras clave
phaseolus vulgaris, nitrogen fixation, nodulation, analysis, rhizobium, strains, on-farm research, el salvador, ecology, symbiosis, fijacion de nitrogeno, nodulacion, análisis, cepas, investigación en la finca