Abstract. This paper presents the crop and quality results obtained on the dark mollic eutric cambisol, moderate gleizated in Timisoara area, for five species of durum wheat varieties, in different fertilization conditions. The varieties considered were Grandur and Condurum of Romania, Achilles and Claudio of Italy, and Selyemdur and Betadur of Hungary. The reference variety in this experiment was Alex belonging to the species Triticum aestivum vulgare. The fertilization levels were N0P70K70, N64P70K70 and N128P70K70. On an average, for the 7 varieties, by applying a dosage of N64 the crop increased by 12%, and by doubling the nitrogen dosage to N128, on the same P70K70 background, the crop growth was enhanced by 21%. Among the existing varieties, the best results were registered for Claudio (5874 kg/ha) followed by the Achilles variety (5,599 kg/ha). With respect to the behaviour of the varieties, we notice that the biggest yield has been obtained for the reference variety Alex of Triticum aestivum vulgare L. This explains the necessity to differentiate the purchase prices of Durum wheat, a species where the production potential of the varieties is under the one of the bread wheat. Among the Durum wheat varieties, the Italian varieties Claudio and Achile called our attention. On an agrifund containing N128P70K70 we obtained crops of 6413 kg/ha (Claudio) and of 6128 kg/ha (Achile). The results of the biometric determinations showed a tendency of plant height increase as the nitrogen dose increases, that is from 73,70 cm (N0) to 91,00 cm for Grandur variety, from 85,15 cm to 95,85 cm for Condurum variety, from 87,85 cm to 90,55 cm for Achile variety, from 84,20 cm to 92,25 cm for Claudio variety, from 76,60 cm to 80,60 cm for Selyemdur variety and from 74,65 cm to 79,55 cm for Betadur variety. All varieties have proven a similar tendency to grow once the nitrogen dose has been increased. The growth could be noticed in the length of the ear, in the number of spicule on the ear and the number of seeds on ear. The protein content ranged from 12.3% to 13.7%, the wet gluten content from 16.64% to 24.60%, and the falling number between 374 and 456 seconds.

Key words: Durum wheat, varieties, fertilization.

Presentation: oral