| Leymus chinensis is a perennial gramineous grass with long rhizomes. It is a kind of high grade pasture growing in light saline-alkali areas in the north of China and it distributs in Mongolia and nature plains of Northeast. It has lots of specialities in physical ecology such as high productivity, tolerance of dry, leanness-resistant and saline-alkali tolerance, abundance of nutrition, great worth of economy and feels well. But recently many plains became saline-alkali and product has been destroyed because of the incorrect using of Leymus chinensis plains. So how to improve tolerance to stress had significant meaning in both product of Leymus chinensis and management and reformation of saline-alkali plains.There are many technique limitations in biology and chemistry about improving tolerance to stress, such as high costs of experiment, complex of operation, leftovers of medicine. We could see many researches in improving tolerance to stress by physics means. In this paper we had new findings in Leymus chinensis tolerance to stress by using high-voltage prick electrostatic field to treat Leymus chinensis seeds.Leymus chinensis seeds were treated by various field strengths and times and then they were sown in pots. All pots were put outside and seedlings were treated with saline-alkali conditions. Physical responses to electrostatic field of enzymatic antioxidant system were measured. The results showed that responses of every parameter to high-voltage prick electrostatic field were not identical. And responses to various electrostatic fields of the same enzyme were not identical either. But most enzymes had the same response that results of effects became significant with stronger field strength in the same time and the effects got better with the longer time in the same electric field strength. There was no comparability in the case of crossing between time and field strength. From all factors, result of effect of 10min,10kv was the best.
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