The Dynamics of Nitrogen Valorification in Wheat Crop under the Influence of the Used Agrofound

The study assessed the efficiency of nitrogen use in winter wheat, cultivar ‘Ciprian’ through the combined application of nitrogen with phosphorus fertilizers, between 2016 and 2021. The research was organized within ARDS Lovrin, Timiş County, Romania, under the conditions of a chernozem soil type. The experimental factors considered were: experimental factor A - year of experimentation - six years 2016-2021; experimental factor B -mineral nitrogen fertilizers, with the following graduations: 0 kg N ha-1 (control), 30 kg N ha-1, 60 kg N ha-1,90 kg N ha-1and 120 kg N ha-1; experimental factor C- mineral phosphorus fertilizers, with the following five graduations: 0 kg P ha-1 (control), 40 kg P ha-1, 80 kg P ha 1, 120 kg P ha-1 and 160 kg P ha-1. Production has been taken into consideration for NEU evaluation (Y, kg ha-1), the total nitrogen (Ntot) content (%) of thegrains, N uptake (%) in relation to the experimental factors considered. Differences in NUEs had different significance compared to each experimental factor, and the interaction between A×B, A×C and B×C factors generated differences in statistically safe conditions (p<0.05 in A×C case, and p<0.001 in A×B and B×C case).