Resposta de cultivares de trigo (Triticum aestivum L.) diferentes manejos de nitrogênio

Abstract

The wheat crop is of extreme importance in the southern region of Brazil, mainly in the state of Paraná, which is the largest Brazilian producer of this grain. Thus, the management of nitrogen under cover is highlighted, since the culture is highly responsive to this nutrient to confer high productivity. The objective of this work is to evaluate the yield of wheat cultivars through two strategies of nitrogen fertilization. The experiment was carried out in the municipality of Realeza / PR, in the 2017/17 harvest. It will comprise a two-factor scheme (4 x 3), in which factor A refers to 4 wheat cultivars TBIO Sonic, TBIO Sossego, TBIO Sintonia e TBIO Toruk and factor B at different times of application of N (without nitrogen, 60 kg of N ha-1 in the double ring + 60 N ha-1 in the terminal spikelet and 120 kg N ha-1 in the phenological stage of the double ring). The design was in randomized blocks with three replications, in a sub divided plot. The yield components of the different cultivars and their productivity were evaluated. The highest yields in kg / ha-1 were with the application of 120 kg of N ha-1 in the phenological stage of the double ring. The cultivar that obtained the highest overall productivity among the tested cultivars was Sossego, which yielded a productivity of 5567 kg / ha-1.