所属单位：

环境与市政工程学院

发表刊物：

Ecological Engineering

关键字：

中文关键字：Plant harvest Biomass Nutrients uptake Constructed，英文关键字：Plant harvest Biomass Nutrients uptake Constructed

摘要：

The importance of harvest management for the growth and development of plants and nutrients removal in constructed wetlands (CWs) is highly controversial. This study evaluated the effects of annual harvesting on the growth and productivity of local Phragmites australis in northwestern China. Growth characteristics such as shoot density, biomass and height were studied using two pilot-scale surface-flow CWs over a two-year operation period. Plants were kept unharvested in one CW for comparative studies with the second CW, which was harvested at the end of the growing season. Each CW of 400 m2 was operated with a hydraulic loading of 34 m3/d for the treatment of water from an urban river polluted with municipal and industrial wastewater. The harvested CW recorded a higher shoot density (175 shoots/m2), biomass (1.4 kg/m2) and peak height (3.4 m) than the unharvested one (130 shoots/m2, 1.2 kg/m2 and 3.2 m). The overall nutrients removals were also slightly higher for the harvested CW (46.0% TN and 38.1% TP) than the unharvested CW (40.6% TN and 29.1% TP). Plants harvesting in the first year improved nutrients removal by plant uptake (41.9 g N/m2 and 3.7 g P/m2 versus 37.3 g N/m2 and 3.2 g P/m2) as well as in the substrate layer (216.9 g N/m2 and 8.0 g P/m2 versus 191.0 g N/m2 and 5.7 g P/m2) during the second year. Nonetheless, the increase in nutrients removal by harvesting was minimal.

备注：

王晓昌

合写作者：

葛媛,MawuliDzakpasu,赵亚乾

第一作者：

熊家晴,王晓昌,郑于聪

论文类型：

期刊论文

卷号：

卷：

期号：

期：83

页面范围：

页：268~275

是否译文：

否

发表时间：

2015-06-01