Histosol fertility and grain yield influenced by liming and inoculation

Abstract

The aim of this study was to evaluate the effect of liming on the chemical properties of a Histosol and the influence of the interaction of lime with the inoculation of atmospheric N2-fixing bacteria (Rhizobium tropici) in foliar nitrogen, phosphorus and potassium and grain yield of bean cultivar Carioca. The experimental design was a randomized block design with three replications and a split-plot. The plots were made by lime and subplots the presence and absence of inoculation. Lime rates used were 0.0, 4.9, 8.9, 15.0 and 27.2 Mg ha-1, respectively aimed at raising the levels of base saturation 20, 30, 45 and 75%. At 45 days after treatment application, we conducted a soil sampling to verify changes in soil chemical properties. In the flowering stage was collected leaves for evaluation of the levels of nitrogen, phosphorus and potassium. At the end of the cycle was evaluated grain yield. The superiority of leaf N content in the liming x inoculation interaction in relation to the non-inoculated control shows that liming favored the symbiosis between common bean and Rhizobium tropici strains and consequently FBN. Liming associated with the inoculation promoted increases in foliar nitrogen and grain yield.

Keywords

• phaseolus vulgaris. acidez do solo. rhizobium tropici.