Chemical composition and deoxynivalenol in wheat of Central- Southern Paraná: nitrogen fertilization in top dressing associated with Azospirillum brasilense

The impact of agricultural management practices on the quality of grain was evaluated in wheat (Triticum aestivum L. BRS Tangará) from the South Central region of Paraná State (Ponta Grossa) in the crop years of 2010 and 2011. The field trial was carried out in succession with soybean (2010) and corn (2011). The treatments included inoculation of seeds with Azospirillum brasilense and increasing levels of nitrogen application in top dressing (0, 30, 60, 90 and 120 kg ha-1). The experimental design was in randomized block, factorial 2 x 5 (inoculation x N levels), with four replications. The parameters evaluated were water activity, moisture, protein, and grain contamination by deoxynivalenol (DON). The data were subjected to analysis of variance, comparison of means by Tukey’s test (p