Efficiency of nitrogen use by wheat depending on genotype and previous crop

ABSTRACT The efficiency of nitrogen use by wheat crop depends on genetic and environmental stimuli. aim this study was to evaluate the crop, through biomass, productivity grain quality indicators, as a function genotype previous harvest, in Southern Brazil cereal cultivation systems. experiments were conducted soybean/wheat maize/wheat systems during 2015, 2016, 2017 Augusto Pestana, RS, Brazil. experimental design randomized block with four repetitions, following 5 × 4 factorial scheme, referring five cultivars (Quartzo, TBIO Sinuelo, Sintonia, TEC 10 Vigore) doses (0, 60, 120 180 kg ha-1) applied topdressing phenological stage expanded third leaf, 13. There differences efficiency, for (yield biomass) wheat. However, these influenced carbon:nitrogen ratios crop. Quartzo Sinuelo had greatest yield, biomass production expectation 3 Mg ha-1, regardless succession system, joint analysis agricultural years.