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首页> 外文期刊>Ecological engineering: The Journal of Ecotechnology >Effects of plant diversity on biomass production and substrate nitrogen in a subsurface vertical flow constructed wetland
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Effects of plant diversity on biomass production and substrate nitrogen in a subsurface vertical flow constructed wetland

机译：地下垂直流人工湿地中植物多样性对生物量生产和基质氮的影响

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摘要

Most biodiversity experiments have been conducted in grassland ecosystems with nitrogen limitation, while little research has been conducted on relationships between plant biomass production, substrate nitrogen retention and plant diversity in wetlands with continuous nitrogen supply. We conducted a plant diversity experiment in a subsurface vertical flow constructed wetland for treating domestic wastewater in southeastern China. Plant aboveground biomass production ranged from 20 to 3121 gm~2yr-1 across all plant communities. In general, plant biomass production was positively correlated with species richness (P=0.001) and functional group richness (P=0.001). Substrate nitrate concentration increased significantly with increasing plant species richness (P=0.046), but not with functional group richness (P=0.550). Furthermore, legumes did not affect biomass production (P=0.255), retention of substrate nitrate (P= 0.280) and ammonium (P= 0.269). Compared to the most productive of the corresponding monocultures, transgressive overyielding of mixed plant communities did not occur in most polycultures. Because greater diversity of plant community led to higher biomass production and substrate nitrogen retention, thus we recommend that plant biodiversity should be incorporated in constructed wetlands to improve wastewater treatment efficiency.
机译：大多数生物多样性实验都是在氮有限的草地生态系统中进行的，而对于连续供氮的湿地中植物生物量的产生，底物氮的保留和植物多样性之间关系的研究很少。我们在地下垂直流人工湿地中进行了植物多样性实验，以处理中国东南部的生活污水。在所有植物群落中，植物地上生物量的产生范围为20至3121 gm〜2yr-1。通常，植物生物量的产生与物种丰富度（P = 0.001）和官能团丰富度（P = 0.001）呈正相关。底物硝酸盐浓度随着植物物种丰富度的增加而显着增加（P = 0.046），但随着官能团丰富度的增加而没有明显增加（P = 0.550）。此外，豆类不影响生物量的产生（P = 0.255），底物硝酸盐的保留（P = 0.280）和铵盐（P = 0.269）。与生产力最高的相应单一文化相比，大多数多元文化中并未发生混合植物群落的过度侵染。由于更大的植物群落多样性导致更高的生物量生产和基质氮保留，因此我们建议将植物生物多样性纳入人工湿地以提高废水处理效率。

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