Evaluation of the effect of nitrogen fertilizers on nitrogen use efficiency in grain maize

Abstract

The study presents the results of 3-year field experiments aimed at  assessing the effect of (i) nitrogen dose (Nf), b(ii) balanced for Nmin content (mineral nitrogen), depending on its soil profile distribution and the influence of (iii) nitrogen fertilizer type on maize grain yield and partial factor productivity of fertilizer nitrogen (PFPFN). Nitrogen applied in the form of mineral fertilizer (Nf) is characterized by greater efficiency in comparison to Nmin contained in soil, which is manifested by a significantly higher grain yield. Slow-release nitrogen fertilizers, such as ammonium sulfate or urea, are the optimal choice for maize fertilization, as they are potentially more suited to the rhythm of its vegetation. This is evidenced by the higher partial factor productivity of fertilizer nitrogen (PFPFN). The productivity of fertilizer nitrogen (Nf) depends on the content of mineral nitrogen present in the deepest soil layers. Climatic conditions, mainly atmospheric precipitation, shape grain yield and partial factor productivity of fertilizer nitrogen (PFPFN).