Investigating the seed and oil quantitive reactions of sunflower cultivars in different dates at Sistan region
Subject Areas :Mostafa Khammar 1 , hamidreza Mobasser 2
1 - Islamic Azad University of Birjand, Faculty of Engineering, Department of Agriculture.
2 - Department of Agronomy, Faculty of Agriculture, Islamic Azad University Zahedan Branch, Zahedan, Iran.
Keywords: Grain yield, Sowing date, Farokh hybrid, physiological harvesting, seed number per head,
Abstract :
To study the reactions of grain quantity reactions and oil of sunflower varieties in different sowing dates at Sistan region and determining the best sowing date and variety, an experiment was conducted in the Sistani’s agricultural and natural resources research and education center as split plot based on randomized complete block design with three replications in 2015.The main factor includes four sowing dates: 21 January, 4 February, 19 February and 6 March and subplot factor includes four sunflower cultivars: Mohali Isfahan, Azargol, Ghasem and Farokh. The results showed that the number of days to physiological examination, number of seeds per head, 1000seed weight, grain yield, oil percentage and oil yield had significant differences in different planting dates.Sowing delay reduced grain yield. The highest grain yield (366.38 kg ha-1) was belonged to sowing date of February 10 and the lowest grain yield was from March 25, with a weight of 2449.21 kg.ha. The effect of cultivar on all traits was significant. Farokh Hybrid had the highest grain yield (3235.9 kg.ha) and the lowest grain yield in Isfahan with the lowest yield of 2627.4 kg / ha. The interaction between sowing date and cultivar was significant on number of days to physiological examination, number of seeds per head and oil percent and grain yield. The results showed that 1000 seed weight, number of heads and number of seeds per head had the most effective role in yield of sunflower oil in grain yield and grain yield and oil percentage plays the most role in the performance of sunflower oil. In general, FarrokhHybrid and sowing date of February 10 are recommended for Sistan region.
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