Effect of rizobacterias inoculating nitrogen fixers in the cultivation of sweet potato (Ipomoea batatas Lam.)

Abstract

The excessive use of nitrogen fertilizers in the nutrition of plants Generates environmental problems and Increases the production costs of crop. Plant Growth Promotingrhizobacteria(PGPR) are an alternative to the use of chemical fertilizers, Favoring the yield of crops. The objective of esta investigation was to determine the effect of inoculation of rhizobacteria With fixed nitrogen sweet potato crop in the Montes de Maria microregion. Sweet potato cutting of the variety Tainung 66, provenance was established under a design of complete blocks at random With an Increased factorial arrangement 3x2+2, with three replications, Where the was evaluated effect of native states of Azotobacter sp. (IBCB10) and Azotobactervinelandii was EVALUATED (IBCB15) mixed With fertilization levels (50% and 75%). The results Obtained Indicate That the inoculation of the IBCB10+IBCB15 bacteria in a mixture With 50% of the nitrogen fertilizer dose, Increased yields the crop by 57% Significantly With respect to the chemical and 93% Control T 2 to T 1 With relation (Without inoculation). Likewise, the application of the bacterium IBCB10 stimulated the production of dry matter greater tuberous roots of sweet potato, by optimizing the absorption of nitrogen fertilizer reduced to 50%. These results allow to rhizobacteria be included in management alternatives for the mineral nutrition of the sweet potato crop.

Development of a Multicomponent Microbiological Soil Inoculant and Its Performance in Sweet Potato Cultivation

“…Inoculation of soil with various strains of Azotobacter (Azotobacter sp. IBCB10 and Azotobacter vinelandii IBCB15) performed eight days after planting could contribute to the decrease of N fertilization [68]. The application of Azospirillum brasilense (TI-Sp-7, ATCC 35629) inoculum into the soil two, four and six weeks after planting increased the storage root yield, especially if applied together with moderate N supply [69].…”