By properly applying all cultivation technological steps specific to sunflower, agriculture becomes more sustainable and performing. As in any crop, spectacular progress by the Company Limagrain in Romania, these last years, ask for deeper research of the main features of the sunflower hybrids of the Clearfield type, their behaviour under the differentiate impact of chemical and foliar fertilisation with further implications on achenes’ morphological features. The main goal of this paper was to establish the impact of the fertilisation system on the morphological features of sunflower seeds in the soil and climate conditions of Timişoara, in three sunflower hybrids. The sunflower hybrids of the Clearfield type from the Company Limagrain and the cultivation technology they supply support scientifically the idea that their introduction into cultivation is the best solution for the farmers. In this paper we point out aspects concerning the importance of sunflower hybrids of the Clearfield type in Romania, the role of chemical and foliar fertilisers on oil content in achenes and of oil production per area unit. These sunflower hybrids can be cultivated with small efforts if we take into account that they can be treated with herbicides post-emergently when broad leave weeds are in the rosette phase and sunflower plants have 3-4 leaves. Cultivating this type of sunflower hybrids makes possible the control of a species of weeds that is extremely damaging to sunflower crops, a weed that is extremely difficult to control through the classical system of herbicides in common genotype sunflower hybrids. The sunflower hybrids resistant to imidazoline developed by the Company Limagrain are: Rimisol (approved for cultivation in Romania since 2004), F 30008, and Hidalgo. Sunflower is cultivated for its seeds used as raw material in the food industry, supplying 9% of the amount of raw materials processed in the world annually in the oil industry, and 12% of the world oil production. 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.

floarea soarelui, hibrizi, însuşiri fizice

Presentation: oral