Effect of Trinexapac-ethyl and nitrogen fertilization on wheat growth and yield

Wheat is one of the most important cereals used for feed. In order to supply this growing demand, more genotypes have been developed with higher yield potential, becoming necessary to offer nutritional requirements. Such requirements, as nitrogen element is considered a yield limiting factor, since the crop requires high rates, what may result in excessive growth of plant and possible lodging. This constitutes an undesirable characteristic for obtaining quality products with high yield and in order to minimize this limiting factor, growth regulator use is recommended. The experiment was conducted at Cafelandia County, Parana State, Brazil, objectifying to test the influence of Trinexapac-ethyl and nitrogen fertilization rates on wheat crop. The experiment was conducted in randomized complete blocks design, in sub-plots scheme, with six treatments. Plant height, ear size, hectolitre weight and yield were evaluated. The results showed that Trinexapac-ethyl application reduced plant height without affecting yield components and nitrogen application did not affect wheat crop development.