海珠湿地一期南地块建设及其启示

文章说明海珠湿地一期南地块的建造理念和施工要领,并介绍改造河道生态水系及塑造景观的方法。通过丰富的水生植物配置和园林造景手法的运用营造人工果园湿地生态环境,使之形成自然、野趣的湿地景观体系,成为一道美丽的水乡生态景观长廊。     

人工湿地植物净化效果研究

通过测定人工湿地污水pH值、NH3-N、TP和TN 4项指标,对芦苇、水葱、香蒲和千屈菜这4种典型人工湿地植物进行了净化效果研究,筛选出净化效果好且具有观赏价值的湿地植物。结果表明:4种植物对水质的处理效果为:pH值基本达到7左右;NH3-N的去除率平均约为50%;TP为40%;TN为25%。4种湿地植物的优选顺序为香蒲>芦苇>水葱>千屈菜。     

水生植物修复富营养化水体的机制

对水生植物修复富营养化水体的机制,即水生植物对营养物的去除、对藻类生长的抑制及净化水质等几个方面进行了综合评述。同时指出,水体生态系统中水生植物与微生物协同降解机制和植物化感抑藻机制的深入研究应成为今后的研究重点。     

伞草等7种水生植物污水净化能力试验研究

本文对伞草等7种水生植物对低浓度污水的净化能力进行了研究，并提出利用水生植物净化能力强的特点，结合人工湿地实行再生水回用于园林景观水体的节水园林观点。     

水生植物在造景中的运用

水生植物的应用有着悠久的历史。介绍了水生植物的概念、分类,从国内外水生植物造景的发展史、水生植物在造景中的作用、水生植物造景的生态要求,并对种植设计要求几个方面进行了阐述。     

Movement of invasive aquatic plants into Minnesota (USA) through horticultural trade

The extent to which invasive aquatic plants move via accidental inclusion in aquatic plant orders or sale of prohibited species is unknown. Forty orders were placed to 34 aquatic plant vendors across the US between May and September 2001 to determine the prevalence of movement into Minnesota via horticultural trade. Federal noxious weeds or Minnesota prohibited exotic species were acquired 92% of the time they were ordered and included Alternanthera sessilis, Butomus umbellata, Hydrocharis morsus-ranae, Potamogeton crispus, and Lythrum salicaria. Ninety three percent of orders received from aquatic plant vendors contained a plant or animal species not specifically requested; 10% of these purchases contained federal noxious weeds or Minnesota exotic species. Lemna minor was the most common incidental receipt found per taxa and per purchase, although Hydrilla verticillata, Lythrum salicaria, Salvinia molesta, and Potamogeton crispus (all prohibited taxa) were also found. Misidentified plants were found in 18% of the orders; unordered seeds in 43%. The sale and transport of prohibited aquatic plants likely presents the greatest risk associated with the aquatic plant trade. Other important factors include misidentification leading to the unintentional sale of invasive plants and the incidental inclusion of species during translocation.     

8种植物对2种质量浓度富营养化水体的净化效果

以风车草、花菖蒲、黑三棱、水毛花、花叶香蒲、马蔺、泽泻、花叶芦苇8种水生观赏植物为材料,设置2个富营养化质量浓度水平,进行水培试验。通过对总氮、总磷和化学需氧量等水体富营养化指标及植物生长指标的测定研究8种植物对富营养化水体的净化效果。结果表明:中质量浓度条件下,总氮和总磷去除率较好的植物为黑三棱、风车草、花叶香蒲,去除率均在83%以上。高质量浓度条件下,总氮和总磷去除率较好的植物为风车草、黑三棱,去除率均在75%以上。马蔺及水毛花在两种质量浓度下的综合净化效果较差。化学需氧量的质量浓度前期下降明显,后期持续缓慢上升。植物对总氮、总磷的去除率与其生长量存在相关性,且高质量浓度条件下相关性更显著,而化学需氧量的去除率与植物生长量的相关性较弱。     

人工湿地污水净化处理研究

介绍了人工湿地污水处理的过程,分析了对氮、磷、重金属离子、有机物的去除机理及效果,对湿地系统的设计做出简要的说明,同时,分析了应用过程中存在的问题,预示了人工湿地污水处理技术在我国北方地区的应用前景。