Effect of harvest date on seed viability of different sunflower genotypes
2006
Miklic, V.(Institute of Field and Vegetable Crops, Novi Sad (Serbia)) | Crnobarac, J.(Faculty of Agriculture, Novi Sad (Serbia)) | Joksimovic, J.(Institute of Field and Vegetable Crops, Novi Sad (Serbia)) | Dusanic, N.(Institute of Field and Vegetable Crops, Novi Sad (Serbia)) | Vasic, D.(Institute of Field and Vegetable Crops, Novi Sad (Serbia)) | Jocic, S.(Institute of Field and Vegetable Crops, Novi Sad (Serbia))
Effect of harvest date on seed viability has been examined in 3 different sunflower genotypes. Harvesting started 7 days after fertilization. It was done 10 times, at 3-4 day intervals. Seed moisture was determined before each harvest. Trials were conducted in India and Serbia. Seed viability was determined 3 months after the harvest. Genotype ranking regarding seed viability, was not the same in the two locations; higher average seed germination was registered in Serbia. There were no significant increases in seed viability once the average seed moisture at the time of harvest reached 41% (India) and 48% (Serbia). Differences existed between the locations in minimum and maximum daily temperatures. Regression analysis showed that highest seed germination rates were reached when seed moisture content at harvest went below 32%, in most cases when seed moisture reached 22-23%.
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