Variáveis microbiológicas e produtividade do arroz sob diferentes manejos do solo e água - DOI: 10.4025/actasciagron.v29i3.281

This experiment aimed to verify the effects of differents soil (MS) and water (WM) managements on upland rice cultivation through microbial biomass carbon (MBC) quantification, evoluted CO 2 (C-CO 2 ), metabolic quotient ( q CO 2 ), micorrhization and crop yield. Cultivar IAC 202 was used. The experimental design was a randomized complete block design, with 3 SM: no-tillage (NT), heavy disk + leveling disk harrowing (HL), and chisel plowing + leveling disk harrowing (CL), plus 3 WM: no irrigation (WD0), water depth 1 (WD1), irrigation at the reproductive and maturation periods and water depth 2 (WD2), irrigation throughout the rice cycle, with four replications. The microbiological variables showed sensitivity in detecting differences between good periods and irregular rainfall, where the NT + WD1 showed best results. However, under the viewpoint of productivity and economic viability, CL + WD1 propitiated the most satisfactory results for rice culture.