Grain yield and technological quality of dual-purpose wheats with additional late nitrogen fertilization

Abstract

The yield and grain quality of dual-purposes wheat cultivars may fluctuate due to the applied management, producing lower results than the expected. This study aimed to determine if the application of an additional dose of nitrogen, at the earing stage beginning, increases the grain yield and modifies the technological quality in double-purpose wheat, regardless of the cutting regime. The experiment was conducted in the experimental field of Embrapa Trigo, in Coxilha-RS, Brazil, 2017. Two dual-purpose wheat cultivars (BRS Tarumã and BRS Pastoreio) and three cutting regimes (no cut, one and two cuts) were used, being submitted or not the application of additional nitrogen fertilization at the beginning of the earing. A trifatorial arrangement was employed, with a randomized block design and three replicates. Data attained were submitted to analysis of variance and compared by the Tukey test at 5% of probability. The evaluated attributes were the height of the plant at harvest, yield, thousand grain weight, number of spikelets/ear, weight of the hectoliter, falling number, and protein in the grain. Additional application of nitrogen did not increase the yield for any studied genotypes, regardless of the cutting regimes, and as for grain quality, the differences between the materials should be taken into account.