Study effect of seed moisture content on viability, vigor and seed quality of two Rape Seed ( Brassica napuse L.) varieties at harvest in Dezfoul area
2009
Sadeghi, Hossein
Evaluation of suitable seed moisture content at harvest for producing of high viability and vigour seed examined for two Oil-seed rape cultivars. This study was conducted in 2007- 2009 in Dezfoul area. Therefore, samples of Hyola 401 and Hyola 308 seeds at 10%, 15%, 25% and 35% moisture content at harvest were taken from the field and tested at seed analysis laboratory. Some seed quality indices like primary and final germination percentage (seed viability), normal and abnormal seedling numbers, mean of daily germination speed (MDG), daily germination speed (DGS), seedling length, fresh and dry seedling weight and seedling vigour index ( seedling dry weight × viability) were measured. Data obtained using a 2×4 factorial experimental based on a completely randomized design with three replications, combined analysis revealed that all characters except normal and abnormal seedling numbers, were significantly different. Primary and final germination percentage, mean of daily germination speed(MDG), fresh and dry seedling weight and seedling vigour index ( seedling dry weight × viability) affected by cultivar × seed moisture content × year interaction. The highest primary and final germination obtained at 15% seed moisture content. The highest rate of mean daily germination speed (MDG), fresh and dry seedling weight and seedling vigour index ( seedling dry weight × viability) were also obtained at 15% seed moisture content. In addition, primary and final germination percentage of Hyola 401 was higher than Hyola 308. This results revealed that seed quality was affected by environmental factors. Seeds harvested at 15% moisture content showed the highest quality
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