河岸带乔木树种配置方式对面源污染物 NH＋4- N 的去除效果

本试验利用自行设计的小型试验装置来模拟河岸带。选取东北地区常见的5种乔木组合成两种不同的配置方式，考察不同乔木树种和不同配置方式对径流和渗流NH4＋-N的去除效果。结果表明，对于NH4＋-N的去除效果黄菠萝、水曲柳（29．77％）的混种优于黄菠萝、茶条槭（23．89％）；蒙古栎、茶条槭（17．07％）的混种优于黄菠萝（7％）单一种植；卫矛、茶条槭（7．62％）的混种优于卫矛（0．52％）单一种植。并且配置方式一（黄菠萝、茶条槭、蒙古栎、卫矛）渗流的平均去除率为43．48％，配置方式二（黄菠萝、水曲柳、卫矛）渗流的平均去除率为40．54％，可见配置方式一的去除效果优于配置方式二。

Effects of Nitrogen Removal for Non-point Source Pollution by Riparian Arbor Plant Arrangement

In this experiment, a small test apparatus was designed to simulate the buffer strips. Five kinds of common arbors were selected and grouped into two different arrangements from the northeast region, to study the effects of different tree species and different arrangements on runoff and seepage nitrogen removal. The results showed that the nitrogen removal of the mixed planting of Phellodenclron amurense and Fraxinus mandshurica （29.77%）was better than the mixed one of Phellodendron amurenses and Aeer gin- nala（23.89% ） ; the mixed planting of Mongolian quercia and Acer ginnala（ 17.07% ） was better than the singal Phellodendron amu- rense（7% ） ; the mixed planting of Euonymus alatus and Acer ginnala（ 7. 62% ）was better than the singal Euonymus alatus（0. 52% ）. The average seepage flow removal rate of arrangement one（Phellodendron amurense, Acer ginnala, Mongolian quercia, Euonymus alatus） was 43.48%, the second arrangement（Phellodendron amurense, Fraxinus mandshurica, Euonymus alatus）was 40. 54%, so the first arrangement was better than the second one.