The researches were carried out in a characteristic region of the Mureş – Bega inter-river field, on a typical chernozem soil. Many climatic types are dovetail with each other in this region: Mediterranean, temperate continental and oceanic climate. The annual average temperature is of 10,80C, according to the data obtained from the Meteorological station Sânnicolau Mare, and the annual precipitations are of 519 mm. The researched varieties of durum wheat were Grandur and Condurum, created in Romania, and Selyemdur and Betadur coming from Hungary. The crop results of the researched field N0P 80 K80, N100P 80 K80 ,N150P 80 K80, N200P 80 K80, showed a crop amplitude of netween 3682 kg/ha (Selyemdur - N0P 80 K80,) and 6478 kg/ha (Condurum - N200P 80 K80). As an average of the four varieties there has been noticed, that by fertilizing with N100 the crop result increased by 18%, respectively to 767 kg/ha, by increasing the nitrogen doses to N150 the crop result increased with 31%, respectively there has been obtained a yield difference of 1321 kg/ha, and by using a dose of N200 the crop increased with 37%, meaning a yield difference of 1576 kg/ha. It results that the crop yield increase obtained by using one kg N s.a. was of 7,67 kg seeds for a dose of N100, of 8,80 kg seeds for a dose of N150 and of 7,88 kg seeds for a dose of N200. As an average for the four agrifunds, the highest crop was obtained for the variety Condurum, being of 5672 kg/ha, that is 7% respectively 368 kg/ha more than the yield obtained for the reference variety, Grandur, a very significant yield difference, the lowest yield, that of 4252 kg/ha, being obtained for the variety Selyemdur, this being statistically a very significant negative difference. Laboratory analyses done on average samples revealed an evolution of the mass of 1000 seeds of between 33,50 g for teh variety Selyemdur and 38,75 g for the variety Condurum; the hectolitre mass was of between 77,16 kg/hl for the variety Selyemdur and 82,10 kg/hl for the variety Grandur. The protein content varied between 13,8% at the variety Selyemdur and 14,4% at the variety Grandur; the wet gluten content was of 28,6% at the variety Selyemdur and of 30,1% at the variety Betadur; the deformation coefficient was 2 mm at the variety Grandur and 3 mm at the other three varieties and the coefficient of falling was of between 373 seconds at the variety Selyemdur and 482 seconds at the variety Grandur.

durum wheat, differentiated fertilization.

Presentation: poster