Published in Scientific Papers. Series A. Agronomy, Vol. LXVIII, Issue 1
Written by Lucian RAUS, Diana BOLOHAN
Slow-release fertilizers provide a steady supply of plant nutrients over an extended period of time. The objective of these investigations was to study what was the amount of nitrogen leached after the administration of nitrogen fertilizers and how it influenced the development of plants during the vegetation period. The experiment was carried out in pots of vegetation with winter wheat. The experiment was conducted in the green house with controlled climate conditions within ICAM Iasi - USV Iasi. This paper presents the results obtained regarding the influence of 5 nitrogen fertilizers, 2 classic fertilizers and 3 slow-release nitrogen fertilizers. The experiment was carried out in pots of vegetation with winter wheat. The amount of nitrogen leached after the administration of nitrogen fertilizers is influenced by the chemical forms of nitrogen included in the chemical composition of the fertilizers, but also by the structure, texture, chemistry of the soil and its fertility status. The amount of nitrogen leached is significantly lower for Sulfammo 25 and 30 variants compared to N2017TAR, Ammonium Nitrate, Ureea and the control, for both experiments.
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