Sunflower represents one of the most important crops in Romania from the point of view of the area cultivated, ranging 3 rd after maize and wheat. In this paper we point out the impact of different systems of fertilisation on sunflower productivity elements. The analysis of results in the three sunflower hybrids under study point out the fact that the number of achenes formed on the calatidium is an important element of sunflower productivity. We have studied three sunflower hybrids resistant to herbicides of the imidazone type from the Limagrain Company: Rimisol (approved for cultivation in Romania since 2004), F 30008, and Hidalgo. These sunflower hybrids have been tested on four agri-funds: N 0 P 0 K 0 , N 60 P 60 K 60 , N 90 P 60 K 60 , and N 60 P 60 K 60 + foliar fertiliser (Fertitel). The bifactorial experiment was set on the experimental field of the Banat University of Agricultural Science and Veterinary Medicine in Timisoara. Introducing into cultivation this type of sunflower hybrids resistant to herbicides containing imidazolines is of particular importance for Romania’s agriculture. Though our results speak for just one year, they are particularly valuable for the agricultural practices and point out the efficacy of chemical and foliar fertilisers. The theme of this research aimed at better knowing sunflower hybrids developed by the Limagrain Company and at expanding their cultivation both in Romania and in Europe. Sunflower hybrids resistant to some post-emergent herbicides of the imidazoline or sulphuran-ureic type contribute, besides the increase of production per ha, to the efficacy of the sunflower crop on farms. By using this type of sunflower hybrids we eliminate 1-2 mechanical works whose efficacy is low in the context of sunflower weeding by creeping thistle (Cirsium arvense) and cockleburs (Xhantium sp.).

sunflower, hibryds, chemical fertilizers and foliar

Presentation: oral