| Abstract: | Objective] The research aimed to reveal the effects of exceasive Mg2+ on the germination characteristics of maise and soybean. Method] E-leven concentration gradients of Mg2+ inchiding 0, 40, 80, 120, 160,200,240,280,320,360 and 400 mmoL/L were set up to study the effects of differ-ent treatments on such indices as the germination potential, germination rate, fresh weight, dry weight, root length, plant height and stem diameter of maize and soybean. Result] With the increasing of Mg2+ concentration, the germination (d" maize delayed and the germination rate of soybean obviously decreased, reaching the significant difference at 0.05 level. When Mg2. concentration increased, the fresh weight and dry weight of maize and soybean de-creased, but maize and soybean showed some adaptability. The growth of radicles and seedlings in maize and soyhean were obviously inhibited by Mg2+, and atrophy and dysplasia phenomena appeared. Conclusion] Excessive Mg~" stress has different effects on the germination potential and germination rate of different crops and has obvious poisoning effects on the root and stem growth of crops. |
