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vol. 14, nr. 1 (2009)
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Possibilities of improving the seeding value of red clover seeds by applying pre-sowing laser stimulation
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Mieczysław Wilczek, Marek Ćwintal
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Department of Detailed Plant Cultivation, University of Life Sciences ul. Akademicka 15, 20-950 Lublin |
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vol. 14 (2009), nr. 1,
pp. 221-231
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abstract:
Studies upon sowing value of red (meadow) clover seeds of Dajana cv. were carried out in 2005-2007. The experiment was conducted by means of complete randomisation in four replications. Studies included two factors: 1. quality of red clover seeding value in study years; 2. seed irradiation before germination, using divergent He-Ne laser beam at power surface densities of 0, 3, and 6 mW cm-2. Seeds were also subjected to 1, 3, or 5-fold laser stimulations. Weather conditions during red clover ripening significantly affected the seed sowing value. The best results were achieved when mean daily air temperature was about 17oC, while precipitation sums ranged between 50.0 and 62.0 mm. Very high rainfalls in that period (275.9 mm) had a negative influence on the value of sowing material by increasing the percentage of seeds abnormally germinating and infected by fungal pathogens. The seed stimulation with laser elevated the germination energy – in reference to the control – as well as the share of germinating seeds, while decreasing the percentage of abnormally germinating and hard seeds. High germination ability was recorded in 2005 and 2007, which qualified these seeds as sowing material. Seeds harvested in 2006 appeared to be unsuitable for that.
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keywords:
red clover, sowing value, laser, weather, ripening
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original in:
Polish
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