7种人工湿地植物根系扩展能力比较研究

A Study on Root Expansibility of Seven Constructed Wetland Plants

以芦苇、美人蕉、香根草、灯心草、旱伞草、香蒲、芦竹7种植物为对象,通过盆栽试验,研究它们在水分诱导方式下根系扩展情况,比较它们的根系极限长度、达到极限长度所用的时间、根系形态和密度、病虫害发生情况。结果表明,水分诱导方式是一种效果显著的促进根系快速增长的技术;文章所选用的7种植物中,旱伞草和香根草的分蘖及根系伸展能力最强,并且没有病虫害发生;其次是芦苇、芦竹,芦竹较少发生病虫害,但芦苇病虫害发生频繁:香蒲、美人蕉和灯心草根系生长较为缓慢,伸展较浅,较少发生病虫害。

Root expansibilities of seven constructed wetland plants, including root length, root density, and disease and pest resistance, were studied. It has been proved that the moisture inducement was an effective measure for the root expansion of wetland plants. It was identified that with the moisture inducement, the root exPansibilities of Cyperus altemifofius and Vetiveria zizanioiaes were the best in those seven plants whilst that of Phragmites communis and Arundo donax L. came next, and the root systems of Typha orientalis Presl., Canna indica L. and Juncus effusus L. were slower in growth and shallower in spread.