Evaluación de la aplicación de bacterias promotoras de crecimiento, sobre la fisiología y productividad de pastos

Abstract

Abstract: The use of growth promoting bacteria (PGPR), is considered as an alternative to replace chemical fertilizers, since it favors the productivity of plant species. The present study evaluated the effect of PGPR of the genera Azospirillum sp. and Azotobacter sp. in the cultivation of Pennisetum clandestinum, on plant height, leaf length, root length, biomass and total protein. The application of the bacteria was made periodically on the crop. The first inoculation was applied after ploughing the land and then every 15 days, until day 45. The results show that Azospirillum sp. and Azotobacter sp. influenced the variables evaluated. The application of Azospirillium sp. showed a significant increase over Pennisetum clandestinum on plant height and root length parameters, while Azotobacter sp. on leaf length, biomass and total protein, so the use of these beneficial organisms could be of great importance in pasture production activities for livestock, in addition to being an aid to reduce the use of chemicals, thus contributing to better crop management and environmental care.