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Cereal Research Communications
Authors: Zs. Szentpétery, M. Jolánkai, Cs. Kleinheincs, and G. Szöllősi

The effects of nitrogen (N) applications on Hungarian, French and Serbian winter wheat cultivars were studied in field trials, which were conducted from 1996 to 2003 in a central Hungarian region, Hatvan-Nagygombos. Nitrogen fertilizer rates of 0, 40, 80, 120, 40 + 40 and 80 + 40 were applied at tillering and after anthesis fazes (Feekes 3 and Feekes 10.5.). The nitrogen used was 36 % ammonium-nitrate in. Split-split plot design with four replications was used. In the experiment we analysed the changes of quantity and baking quality of yield. Amount of rainfall during the vegetation period had a significant effect on wheat yield. Differences in rainfall during the vegetation period — especially in April and May — had a significant effect, too. It turned out that in drought periods nitrogen top-dressing has a great importance. In the dry 2001–2003 years even the 40 kg/ha dose resulted in extra yield. 80 and 120 kg/ha fertilizer rates was even more effective. The increasing dose of nitrogen top-dressing and its division resulted in this trial in an outstanding quality improving effect in spite of the unfavourable ecological circumstances. Especially great improvement was observed in the case of foreign varieties. Nitrogen top-dressing stabilized the falling number values.

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