人类活动对河岸带植被氮磷生态化学计量特征的影响——以汾河临汾段为例
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X53

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国家自然科学基金项目“河流交汇区水流紊动特性与污染物输运机理研究”(51679191); 陕西省自然科学基础研究计划项目“汉江原水在长距离输送过程中的水质变化与影响因素研究”(2019JLM-60); 山西省水利科学技术研究与推广项目“汾河临汾段河岸带对氮磷的截留作用与健康评价研究”(TZ2019011)。


Effects of Human Activities on Nitrogen and Phosphorus Ecological Stoichiometry of Vegetation in Riparian Zones -A Case Study at Linfen Section of Fenhe River
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    摘要:

    [目的] 探究自然河岸带和强人工干扰河岸带土壤—植被系统氮、磷生态化学计量的变化规律,为该区域的河岸带修复和环境保护提供科学依据。[方法] 利用相关分析和偏冗余分析等方法,以汾河临汾段典型河岸带为例,探讨自然河岸带及强人工干扰河岸带土壤—植被系统氮、磷含量的时空分布特性及其影响因素。[结果] 河岸带植被总氮(TN),总磷(TP)含量随枯水期—平水期—丰水期表现为先减小后增大的趋势,近岸处植物TN,TP含量大于远岸处植物TN,TP含量。河岸带植被TN,TP内稳性表现为自然河岸带>强人工干扰河岸带,两处河岸带植物TP属弱敏感态指标,N/P存在绝对稳态。河岸带土壤pH值、TN及TP含量与植物氮、磷含量的交互作用较为明显。[结论] 汾河临汾段典型河岸带植被氮、磷时空分布与河岸带土壤氮、磷时空分布特性相似,人类活动对河岸带土壤—植被系统氮、磷生态化学计量特征具有重要影响。

    Abstract:

    [Objective] Changes in the ecological stoichiometry of nitrogen and phosphorus in a natural riparian zone and a strongly artificial disturbed riparian zone were explored in order to provide a scientific basis for the restoration of riparian zones and environmental protection in the Linfen section of the Fenhe River. [Methods] The spatiotemporal distribution characteristics and influencing factors of nitrogen and phosphorus in the soil-plant system between a natural riparian zone and a strongly artificial disturbed riparian zone were studied by correlation analysis and partial redundancy analysis methods. [Results] The contents of plant total nitrogen (TN) and total phosphorus (TP) in riparian zones decreased first and then increased during the period of dry season, normal season, wet season. The contents of plant TN and TP in the near-bank area were higher than in the far-bank area. The internal stability of plant TN and TP in riparian zones was higher in the natural riparian zone than in the strongly artificial disturbed riparian zone. Plant TP values in the two riparian zones were weakly sensitive to state index, and N/P values were absolutely stable. The interaction of soil pH value, TN, and TP, with plant TN and TP contents were obvious in riparian zones. [Conclusion] The spatiotemporal distribution characteristics of nitrogen and phosphorus in the soil-plant system were similar to those in soil in typical riparian zones of the Linfen section of the Fenhe River. The ecological stochiometric characteristics of nitrogen and phosphorus of the soil-plant system were significantly affected by human activities.

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蔡雅梅,冯民权,肖瑜.人类活动对河岸带植被氮磷生态化学计量特征的影响——以汾河临汾段为例[J].水土保持通报,2022,42(1):17-25

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  • 收稿日期:2021-09-05
  • 最后修改日期:2021-10-03
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  • 在线发布日期: 2022-03-12
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