Influence of oxyfluorfen on soil micro flora in the fruit-bearing apple plantation

Abstract

Studies were conducted in the period 2009-2011 in the experimental field of the Institute of Land Reclamation and Agricultural Mechanization – Sofia. The following treatments were used: a₁ - no herbicides with weeds (C₀); a₂ - herbicide oxyfluorfen (Goal 2 E) at a rate of 250 ml / da; a₃ - herbicide oxyfluorfen (Goal 2 E) at a rate of 500 ml / da. The experiment was set up using long plots, three versions in three replications with harvest area size of 20 m². Herbicide oxyfluorfen (Goal 2 E) used at rates of 250 and 500 ml/da, suppresses the development of ammonifying bacteria and bacteria-digesting mineral nitrogen in the 0-10 cm soil layer and stimulates it in 10-20 cm layers. Oxyfluorfen used at rates included in the study had no depressing effect on the development of actinomycetes and micromycetes at both depths studied. A significant effect on microorganisms in 0-10 cm and 10-20cm soil layers was not established after oxyfluorfen application.