Abstract: Mass of 1000 grains is a polygene determinism trait, highly influenced by enviroment. Therefore, establishing a soil background on wich mass of 1000 grains is the highest, has a special importance. Research was carried out in Didactic Station  Timisoara in 2005-2007 period and aimed at improving fertiliser response with effect on quality features. The studied cultivars were Alex and Romulus. Fertilisation levels were N 0 P 0 K 0 , N 45 P 45 K 45 ; N 100 P 45 K 45 ;  N 150 P 60 K 60 . We used the folowing herbicides: Icedin super RV(300 g/l acid 2,4 D+100 g/l dicamba) 1l/ha, Derby 175 SC (75g/l florasulam+100g/l flumetsulam) 0,07 l/ha and Aim Plus (5,75 % carfentrazon-ethyl + 64,7% acid 2,4 D) 0,35 kg/ha. Experiments were of the polyfactorial type and organised after the sub-divided plot method with 4 replications. The soil taxonomical unit was vertic strongly gleyied chernozem. Soy was the pre-emergent crop. As for the climatic characterisation (average monthly temperature and monthly precipitations recorded at the Meteorological Station in Timisoara) we can assess that the agricultural year 2004-2005 was a rainy year, the agricultural year 2005-2006 was a normal one, and the agricultural year 2006-2007 was a dry one. Analysing the results obtained, we  can conclude that the variant N 100 P 45 K 45 is optimal in both winter wheat cultivars which can be explained by the fact that with the increase of the agri-fund from N 100 P 45 K 45 to N 150 P 60 K 60 there is also increase of yield ad particulary increase of the number of grains per spike, while grains size is smaller. The herbicides application has a positive impact on the mass of 1000 grains, the differences between the averages of the three herbicides being very small. The best influence of mineral fertilisation on the 1000 grain mass was in variant treated with Aim Plus 0,35 kg/ha, when the determination coefficient was maximal. Results contribute to the establishment fertilisation improvement with a view to obtain yields with superior bread-making features.

mass of 1000 grains; mineral fertilisation; herbicides; winter wheat cultivars

Presentation: oral