01779naa a2200229 a 450000100080000000500110000800800410001902200140006002400570007410000190013124501430015026000090029352010130030265300400131570000170135570000260137270000230139870000260142170000160144770000200146377300660148320752612018-01-10       2017    bl uuuu     u00u1 u    #d  a1532-40877 ahttp://dx.doi.org/10.1080/01904167.2017.13108902DOI1 aSATURNO, D. F.  aMineral nitrogen impairs the biological nitrogen fixation in soybean of determinate and indeterminate growth types.h[electronic resource]  c2017  aSoybean (Glycine max Merrill) crop production in Brazil relies mainly on biological nitrogen fixation (BNF) for nitrogen (N) supply. Recent adoption of indeterminate growth-type genotypes has raised doubts on the need for supplemental mineral N that might negatively affect the BNF. We assessed the effects of mineral N on BNF attributes of soybean genotypes grown in central and southern Brazil. Genotypes were inoculated with Bradyrhizobium sp. and/or received mineral N in three sets of experiments. In the first set, two genotypes received increasing rates of mineral N in nutrient solution, which consistently reduced the BNF. In the second set, mineral N applied at sowing and/or topdressing reduced nodulation and ureides-N in determinate and indeterminate growth-type genotypes. In the third set, mineral N applied at R5.3 stage, foliar or as topdressing, did not increase grain yield in four field experiments. Mineral N impaired BNF irrespective of the growth type and had on effect on grain yield.  aFixação biológica de nitrogênio1 aCEREZINI, P.1 aSILVA FILHO, P. M. da1 aOLIVEIRA, A. B. de1 aOLIVEIRA, M. C. N. de1 aHUNGRIA, M.1 aNOGUEIRA, M. A.  tJournal of Plant Nutritiongv. 40, n. 12, p. 1690-1701, 2017.