دانلود رایگان مقاله اثرات تابش پلاسما با استفاده از گازهای تغذیه های مختلف بر رشد ترب

abstract

In this work, we have studied the action of dielectric barrier discharge (DBD) plasma irradiation using various feeding gases on seeds of Raphanus sativus L. and analysis their growth. Our experimental data shows that Air, O2, and NO(10%)þN2 feeding gases plasma irradiation enhanced plant growth, whereas N2, He and Ar feeding gases plasma irradiation had little influence on plant growth. Moreover, humid air plasma irradiation was more effective in growth enhancement than dry one. More than 2.3 times faster growth was observed by 3 min air plasma irradiation with 40e90% relative humidity. The reactive species generated by plasma in gas phase were detected using optical emission spectroscopy and in liquid phase by electron spin resonance (ESR) spectroscopy. We concluded that OH and O radicals were key species for plant growth enhancement.

4. Conclusion

This study demonstrated the importance of various gases and humidity on plasma induced growth enhancement. The following conclusions are obtained in this study. 1. Air, O2, and NO (10%)þN2 gases plasma irradiation enhance their growth, whereas N2, He and Ar gases plasma irradiation do not have significant effect on growth enhancement. 2. O2 gas fumigation enhances their growth, while NO(10%)þN2, N2, He, and Ar gases fumigation do not. 3. 3 min irradiation of air gas plasma with 40e90%rh leads to more than 2.3 times faster growth. 4. OH and O are key species to growth enhancement based on growth enhancement. 5. Radicals in gas were detected by optical emission spectra, while OH radicals detected in solution using ESR 6. Even for the long storage duration of 17 months, seeds with air plasma irradiation still keep growth enhancement ability. Hence, plasma irradiation has strong influence on growth enhancement and it can be improved by changing the feeding gases and humid conditions Therefore, plasma can play important role in agriculture development.