Efecto de la inoculación de bacterias nativas solubilizadoras de fósforo en el desarrollo y rendimiento de tres cultivos agrícolas en Mochumí, Lambayeque, Perú

• Autor: Carreño Farfán, Carmen Rosa
• Formato: tesis doctoral
• Fecha de Publicación: 2009
• Institución: Universidad Nacional de Trujillo
• Repositorio: UNITRU-Tesis
• Lenguaje: español
• OAI Identifier: oai:dspace.unitru.edu.pe:20.500.14414/10375
• Enlace del recurso: https://hdl.handle.net/20.500.14414/10375
• Nivel de acceso: acceso abierto
• Materia: Bacterias solubilizadoras de fósforo, Lycopersicon esculentum Mill, Phaseolus lunatus L, Zea mays L, Pseudomonas sp.

This study was conducted to determine the effect of phosphorus solubilizing native bacteria on Zea mays L. “maize”, Lycopersicon esculentum Mill. “tomato” and Phaseolus lunatus L. “lima bean” at the lowest part of the valley Chancay, Mochumi, Lambayeque, as an alternative to the problem of limited phosphorus availability. Bacteria were isolated on SRSM (CaHPO4.2H2O = 5.6 gL-1) agar and they were recognized by a translucent halo. The in vitro solubilization efficiency was determined in batch tank bioreactors with an air flow of 0,8 vvm , 1% of inoculum (108 cell mL -1), at 28 ° C for 5 days. 323 isolations were obtained and their halos diameters ranged from 1 to 11 mm, 79.26% of the isolation kept their solubilization capacity, identifying Enterobacter, Bacillus, Erwinia, Micrococcus, Paenibacillus, Serratia, Pseudomonas, Xanthomonas, Burkholderia, Acinetobacter and Azotobacter. The highest values on the solubilization efficiency were reached by Micrococcus sp.UNPRG1 (21.63%), Pseudomonas sp.UNPRG13 (21.07%) and Pseudomonas sp.UNPRG6 (18.74%), so were inoculated (5 mL) in the rhizosphere of yellow hard hybrid maize Dekalb 5005; tomato cv. Rio Grande and Baby Lima bean variety mixture. They were included a chemical treatment and a control treatment, using a DCA for greenhouse assay and BCA for field assay. Native bacteria in the greenhouse assay, influenced positively on vegetative development resulting in a decrease in the number of days to flowering, increased height and dry matter of aerial part and roots. In the field, the native Pseudomonas strains, but not Micrococcus increased yields, reaching values up to 10.056 t ha -1 for maize, 24.669 t ha -1 for tomato and 1.923 t ha -1 in lima bean, with effectiveness rates of 23.3%, 37.6% and 48.84% respectively in comparison to control treatment. It was showed the beneficial effect of the application phosphorus solubilizing native bacteria on maize, tomato and lima bean.