Inoculation of native pasture aiming at accumulation of dry matter, nitrogen and crude protein

Abstract

Pasture inoculation has emerged as a sustainable and promising practice, promoting soil health by enhancing beneficial microbiological activity and reducing dependence on chemical inputs. This study evaluated the use of plant growth-promoting bacteria as an alternative to nitrogen fertilization in native pastures in Curitibanos (SC). Inoculations with Azospirillum brasilense, Bacillus subtilis, Pseudomonas fluorescens and Rhizobium tropici were tested, associated with the application of 50% of the recommended dose of nitrogen. The experiment was conducted in a randomized block design with five treatments and five replicates. The variables analyzed were dry matter accumulation, nitrogen content and crude protein. Nitrogen content and crude protein did not show statistical differences between treatments. Dry matter accumulation was significantly higher in treatments with Rhizobium tropici, evidencing its potential to increase the productivity of native pastures. Although the literature is still limited regarding the inoculation of microorganisms in native fields, the results of this work indicate that the practice can reduce the need for chemical fertilizers, reduce environmental impacts and promote greater sustainability in pasture management.