湿地植物根系泌氧研究

Research of Radial Oxygen .Loss from Roots of Wetland Plants

植物是人工湿地不可缺少的一部分，它能牢固湿地的床表面，降低冰霜在湿地表面凝结，拦截大颗粒污染物，吸收营养物质，提供野生生物生境，改善废水处理系统的景观。提供微生物的生长空间。此外，湿地植物还具有一项重要的功能，向根际输氧，从而增加根际周围微生物、酶的活性，加强有机物的好氧降解和硝化作用，提高系统的净化效果。湿地植物由于其内部强大的通气组织和根系泌氧（Radial OxygenLoss，ROL），使得湿地植物能够在缺氧的环境中生存，本文介绍湿地植物通气组织的形成和作用，根系泌氧的特性和影响因素，根系泌氧屏障，测量植物根系泌氧的方法以及相关研究工作的展望。

Wwetland plants play very important roles in treating with sewages, they can fix the surface of wetland bed tightly, preventing frost from being coagulated at the surface, holding up the big granule of pollutants, absorbing the nutrient substance, providing wildlife with niches, improving the quality of landscape of the wastewater treatment system, offering the microbes space to live in. In addition, wetland plants also have an important function, which is, enhancing the activity of enzyme and the amount of microbe species that around rhizosphere, reinforcing organism＇s aerobic degradation process and nitrification, and improving the purification effect of the entire system by transferring oxygen to the rhizosphere. Because of the huge internal aerenchyma and Radial Oxygen Loss, wetland plants can survive under anoxie conditions. This paper will introduce the formation and function of aerenchyma, the character and influences of ROL, the barrier to ROL, the methods about how to measure the ROL and what the author will do.