Eurasian Journal of Soil Science

Yazarlar: Theodore KARYOTİS, İbrahim GÜÇDEMİR, Suat AKGÜL, Anas PANAGOPOULOS, Katerina KARYOTİ, Süleyman DEMİR, Ali KASACI

Konular:-

DOI:10.18393/ejss.78451

Anahtar Kelimeler:Fertilization,Leaching,Mineralization,Nitrates,Nitrogen

Özet: To create a rational nitrogen fertilization plan, a mass nitrogen (N) balance was used for the main crops of Turkey. The following components are included in the suggested N fertilization plans: the quantity of N fertilizer which is required by the crop for a targeted and sustainable yield, nitrogen inputs available to the crop without fertilization, nitrogen losses mainly due to nitrates leaching and emissions to the atmosphere. This simple equation was transformed to a more detailed one and fertilization plans are based on the total N required to produce a crop of a targeted yield, N mineralized from Soil Organic Matter (SOM), the residual plant available inorganic N before sowing or planting, input of nitrogen from rainfall and losses through leaching and emissions. This work is based on available data and is an open sheet balance which can be easily used by local authorities. Decreased N fertilization can be applied without significant yield reduction and this can be explained by increased N use efficiency, as a result of proper time of application and splitting of N fertilizers in doses. This model can be appropriately adapted according to site-specific conditions, whilst new parameters can be added to improve precision of the performed calculations.

---