دانلود رایگان مقاله لاتین رشد ترب از سایت الزویر
عنوان فارسی مقاله:
اثرات تابش پلاسما با استفاده از گازهای تغذیه های مختلف بر رشد ترب
عنوان انگلیسی مقاله:
Effects of plasma irradiation using various feeding gases on growth of Raphanus sativus
سال انتشار : 2016
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مقدمه انگلیسی مقاله:
1. Introduction
In the last decade, the world agricultural yield increase has not kept pace with the rapid world population growth [1e5]. The demand for food will continue to increase towards 2050 as a result of population growth by an additional 2.7 billion people [6]. Such demand will cause the global food crisis. One possible solution to the global food crisis is to improve agricultural productivity and output. Fig. 1, shows approaches to improve agricultural productivity and output together with potential plasma applications. There are three main categories of improvement methods of the agricultural productivity and output: irrigation, fertilization, and crop protection. Atmospheric pressure nonthermal plasmas can contribute such improvements in the three categories by various ways such as sterilization, fertilization, water treatment and purification, soil treatment, seed treatment, storage improvement, insecticide, pre-harvest treatments, post-harvest treatments, because they provide radicals, ions, electrons, light, as well as electric field without appreciable thermal damage to plants, crops, and fruits [7e17]. Improvement of agricultural productivity has been also tried by gas fumigation, seed treatments using radiations, UV light, laser, electric field, and magnetic field [18e28]. It is important to clarify advantages and disadvantages of plasma treatments over other methods [29e38]. Our group has already reported that dielectric barrier discharge (DBD) plasma irradiation to seeds of radish sprouts (Raphanus sativus L.) can induce continuous growth enhancement of the plants after their germination for three weeks [7e9]. We have also shown plasma irradiation to seeds can significantly increase crop yields and shorten harvest time [10]. However, the growth enhancement mechanism has not been clarified yet. Here to obtain information on key species involved into the growth enhancement, we have studied effects of DBD plasma irradiation using various feeding gases to seeds of radish sprouts and analysis their growth. For better understanding we have compared the gas fumigation and plasma irradiation on the growth of radish sprouts. We have also studied the generation of reactive species using optical emission spectroscopy (OES) for various gas feeding plasmas. Additionally, we have also studied the generation of hydroxyl radicals ( OH) in DI water after the plasma radiation using various feeding gases using electron spin resonance (ESR) spectroscopy with help of 5,5-dimethyl-pyrroline N-oxide (DMPO) spin trap. Latter, we have studied the growth enhancement in humid air plasma. Furthermore, we have also the studied the effect of storage days on plasma irradiation seeds.
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کلمات کلیدی:
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