Abstract

ORTIZ-ALFONSO, Aldo Andrés et al. Levels and moment of nitrogen application in wheat (Triticum aestivum L.). Rev. ciente. UCSA [online]. 2025, vol.12, n.1, pp.24-30. ISSN 2409-8752.  https://doi.org/10.18004/ucsa/2409-8752/2025.012.01.024.

Wheat (Triticum aestivum L.) is a crop affected by various factors of both biotic and abiotic origin, among these; the management of nitrogen fertilization stands out; it should be considered that nitrogen is the most important element in determining the yield and quality of wheat, so this practice is considered a very important factor. This study aimed to evaluate the effect of nitrogen application at different levels and in two phenological stages of the crop. Three levels of N-urea were used: 0, 46 and 92 kg ha⁻¹. Fertilization was carried out at two times: at the beginning of tillering and during grain filling. The experiment was designed in randomized complete blocks with a 3 × 2 factorial arrangement (three doses of N-urea and two application times). The variables evaluated were 1,000- grains weight, grain yield and quality parameters: PH, Falling Number, gluten and bran. Both 1,000-grain weight and yield were influenced by the dose and timing of N-urea application, with statistical differences in the ANOVA test for individual effects and interactions. The highest yield, 3,180 kg ha-1, was obtained with the highest fertilizer dose applied at tillering. This treatment exceeded the control where no nitrogen fertilizer was applied by 1,341 kg ha-1. Among the quality parameters evaluated, only PH showed statistical differences due to the dose effect and the dose-time interaction. A high and positive correlation was evident between yield and 1,000-grain weight.

Keywords : Fertilization; management practice; urea; yield; quality.

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