Biophysical and growth parameters in relation to yield in sunflower (Helianthus annuus)

摘要

The effect of magnetic field on different crops particularly germination, root and shoot growth of plants have been studied by several researchers. Florez et at (2007) reported that the germination and early growth of maize seedlings enhanced when seeds were exposed to stationary magnetic field. Vashisth and Nagarajan (2008a, 2008b, 2010) reported significant increase in germination, seedling vigour and shoot/ root growth of one month old plants of maize chickpea and sunflower seeds exposed to staticmagnetic fields. In our earlier experiments, seeds of sunflower (Helianthus annuus L.) were exposed to different magnetic fields (50, 100, 150, 200 and 250 mT) and duration (1, 2, 3 and 4 hr). Treatment of sunflower seed in these magnetic field increased speed of germination, seedling length and seedling dry weight under laboratory germination tests. Over the check of the various treatments 200 mT for 2 hr exposure gave the peak performance in terms of shoot and root growth (Vashisth and Nagarajan 2010). The present studies were carried out to compare the effect of sunflower seeds exposed to standardized magnetic fields on growth parameter at different stage of growth and yield as compared to untreated control.