Produção forrageira e fósforo na parte aérea da alfafa (medicago sativa) inoculada com bactérias solubilizadoras de fosfato

Abstract

This work aimed to evaluate the effects of inoculation with phosphate solubilizing bacteria on forage production and phosphorus availability in alfalfa (Medicago sativa). The experiment was conducted from July/2021 to February/2022, using a randomized block experimental design (DBC), with 6 treatments and 4 repetitions, totaling 24 experimental units (plots). The treatments used were: control (base fertilization); inoculation; fertilization with soluble phosphorus source; fertilization with low solubility phosphorus source; inoculation + fertilization with soluble phosphorus source and inoculation + fertilization with low solubility phosphorus source. The results of the statistical analysis showed that total dry mass, leaf/stalk ratio, and P content (1st and 2nd cuts) were not significantly influenced by the treatments tested. As for the variables natural matter of stalk and leaf, height and dry matter of stalk and leaf, there was an effect of treatment (p<0.05), but with variability between the cuts evaluated. The variability in the responses found between cuts does not allow us to infer the influence of inoculation with phosphate solubilizing microorganisms on the forage production of alfalfa. The levels of phosphorus in the aerial part of alfalfa are not influenced by inoculation with phosphate solubilizing microorganisms.