The effect of nutrient supply and plant protection in yield and oil content of sunflower (Helianthus annuus L.)
Sunflower is the most important oil crop in Hungary which is grown on the biggest area of all the oil crops. The area of producing sunflowers was changing to 400–520 thousand hectares in the past decade in comparison with approximately 100 thousand hectares in the 1970’s. During the examination different sunflower hybrids were examined. The doses of chemical fertilizers were the following in 2010: 0-30-90- 150 Kg/ha N, 0-50-90-90 Kg/ha P2O5 and 0-70-110-110 Kg/ha K2O. Three different treatments of plant protection were used in the experiment to protect them from fungal infections. A rise in the dosage of nitrogen resulted in increasing infectious diseases. The biggest fungal infection was identified in 150 Kg/ha N, 90 Kg/ha P2O5 and 110 Kg/ha K2O treatment. Average yield was changing between 1.96–2.67 t/ha in 2010. The examination was also directed at analysing the impact of different treatments on the profitability of sunflower production.
2. Ivány K., Kismányoky T. – Ragasits I. (1994): Növénytermesztés Mezıgazda Kiadó, Budapest.
3. Pepó P., Zsombik L. (2003): Napraforgó termesztéstechnológiai vizsgálatok legújabb eredményei. Gyakorlati Agrofórum, 14. Évf. 3. szám, 15– 16 p.
4. Radics L. (2003): Szántóföldi növénytermesztés. Szaktudás Kiadó Ház
5. Vear F, Tourvieille D. (1984): Recurrent selection for resistance to Sclerotinia sclerotiorum in sunflowers using artificial infections. Agronomie, 4: 789–94.