Efecto de la fijación biológica de nitrógeno de tres dosis de Rhizobium Spp. En frijol (Phaseolus Vulgaris L.) En los 60 días de desarrollo del cultivo en la ciudad de Ibarra provincia de Imbabura

The objective of this research was to evaluate the effect of three doses of Rhizobium spp. on the growth and development of common bean (Phaseolus vulgaris L.) in the city of Ibarra, province of Imbabura, over a period of 60 days. Several agronomic variables were assessed, including plant height, the SPAD index (which measures chlorophyll content in the leaves), the number of nodules, leaf mass, and root mass. The results indicated that the lowest dose of Rhizobium spp., corresponding to treatment 3 (6 × 102,5 UFC/ml), showed the best effects on all evaluated variables. This dose significantly favored the vegetative development of the plants, increasing their height, the number of nodules in the roots, and promoting greater growth of both leaf and root mass, suggesting an optimization of biological nitrogen fixation. To ensure an adequate water supply and facilitate the absorption of nutrients, a drip irrigation system with Drench was implemented, which allowed efficient use of the water resource. Additionally, presumptive tests were carried out to determine which of the Rhizobium spp. strains evaluated had the highest nitrogen fixation capacity. The results demonstrated that the low dose of Rhizobium spp. not only improved the physical development of the bean but also showed its potential to contribute to more sustainable bean production in the region. These findings are relevant for optimizing agricultural practices in the area, promoting more efficient use of resources, and reducing the reliance on synthetic fertilizers.

• מחבר ראשי: Puerres Caicedo, Erika Cristina (author)
• פורמט: bachelorThesis
• יצא לאור: 2025
• נושאים: rhizobium spp., fijación biológica de nitrógeno, frijol (Phaseolus vulgaris L.), masa radicular, riego por goteo
• גישה מקוונת: https://repositorio.puce.edu.ec/handle/123456789/45543