Published in Scientific Papers. Series A. Agronomy, Vol. LXVII, Issue 1
Written by Florin Mădălin JENARU, Viorel ION
Sustainable agriculture is correlated with the rational use of fertilizers, mineral nutrition being one of the main production factors that directly influence the achievement of safe, constant, efficient and quality agricultural production. The use of modern, intensive, but equally environmentally friendly technologies can ensure the production objectives of farmers, ensuring the profitability of activities carried out in compliance with production and environmental protection norms. The aim of this paper is to present the obtained results regarding the effects of different complex fertilizers and their application methods at sunflower under the specific growing conditions of South-Est Romania. In this respect, field experiments were performed in Dobrogea region from South-East Romania, under rainfed conditions in the years 2022 and 2023. The experimental factors were the following: Factor A – Application methods, with 2 graduations: a1 = Surface broadcast + incorporation; a2 = Banded with sowing; Factor B – Complex fertilizer product, with 3 graduations: b1 = NPK 20-20-0; b2 = Duofertil Eurocereal 34; b3 = DAP (18-46-0). The complex fertilizer Duofertil Eurocereal 34 proved to assure the highest grain yields especially when it was broadcasted and incorporated at the seedbed preparation, but the average differences between the experimented complex fertilizers are not statistically significant. Surface broadcast of the experimented fertilizers followed by their incorporation through the seedbed preparation proved to be more efficient then the banded fertilizer application with sowing regardless of the climatic conditions of the experimented year.
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