混合型生态修复技术在内河航道岸坡防护中的应用

以1 km通榆河为试验地,分别实施5种方案:1)在塌陷处移栽植物(芦苇、茭白、杞柳);2)植物移栽+外侧防护(木、竹混合栅栏);3)植物移栽+外侧防护+回填泥土;4)芦苇种子播种+外侧防护+回填土;5)以坍塌的裸露岸坡为空白对照,探讨几种混合型生态修复方式在通榆河岸坡防护中的实际效果。结果表明,在通榆河岸坡移栽芦苇和茭白、扦插杞柳是可行的,但需要在移栽区域的外侧进行适当的机械防护。移栽植物后多种本土植物的大量迁入形成具有高覆盖度的次生群落。本研究中的几种方案都显著降低岸坡坍塌速度,其中,方案3效果最佳。与传统方式相比,这种有机械保护的岸坡生态防护方式具有很好的经济效益。

Application of mixed eco-restoration technology in slope protection of inland river

One kilometer of the slope of Tongyu river is selected as the experimental field. Five ecological restoration schemes are applied to the slope protection. The effects of the five schemes show that it is profitable and successful to transplant phragmites australis, zizania latifolia, salix integra linn on the slope of Tongyu river,and the lateral suitable protection is necessary and effective. Another effect of transplanting is that it leads to the immigration of a few local species of vegetation, and thus forms a secondary community with a high cover degree.All the schemes have effects on slowing down the collapsing rate of the slope and Scheme 3 (transplanting +fence + refilling soil) is the best.