02294naa a2200289 a 450000100080000000500110000800800410001910000260006024501250008626000090021150001430022052012690036365000200163265000190165265000240167165000130169565300190170865300370172765300280176465300260179265300180181870000230183670000170185970000130187670000230188977300920191221005882019-01-09       2018    bl uuuu     u00u1 u    #d1 aGARCIA FUENTES, L. F.  aCorn agronomic traits and recovery of nitrogen from fertilizer during crop season and off-season.h[electronic resource]  c2018  aTítulo em português: Características agronômicas do milho e recuperação de nitrogênio do fertilizante durante a safra e a safrinha.  aThe objective of this work was to evaluate corn agronomic traits in a cultivation subjected to different N rates, during the fall?winter (off-season) and spring?summer crop seasons, and N recovery from fertilizer. The experiment was set up in a randomized complete block design with four replicates, in a 5x2 factorial arrangement, with the following treatments: five N topdressing rates ? 0, 30, 60, 90, and 120 kg ha-1 ?, using urea as source; and two crop seasons, fall?winter and spring?summer. The following variables were determined: plant height, height of the first ear insertion, number of grains per ear, diameter and length of ear, 1,000-grain weight, N concentration in the leaves and grains, grain-protein concentration, grain yield, N recovery from fertilizer, and soil-N supply. Nitrogen rates in the fertilizer in the fall?winter season had no effect on grain yield, although corn agronomic traits showed a greater reliance on fertilizer-N rates in that season than in the spring?summer, which is a season associated to a greater capacity of soil-N supply to plants. The quantification of soil-N supply enabled knowing the nutrient dynamics during the fall?winter and the spring?summer seasons, which may be useful to guide N fertilization of corn.  aPlant nutrition  aSoil fertility  aFertilidade do Solo  aZea Mays  aDe N pelo solo  aManejo da adubação nitrogenada  aN-fertilizer management  aNutrição de plantas  aSoil-N supply1 aSOUZA, L. C. F. de1 aSERRA, A. P.1 aRECH, J.1 aVITORINO, A. C. T.  tPesquisa Agropecuária Brasileira, Brasília, DFgv. 53, v. 10, p. 1158-1166, Oct. 2018