| 不同流域水陆过渡带氮磷有效态的特征对比及环境意义 |
| 摘要点击 2208 全文点击 659 投稿时间：2020-09-18 修订日期：2020-12-30 |
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| 中文关键词 氮磷有效态 水陆过渡带 土壤 沉积物 流域 |
| 英文关键词 available nitrogen and phosphorus land-water transition zone soil sediment watershed |
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| 中文摘要 |
| 为了解不同流域水陆过渡带氮磷的分布特征及其环境意义，对闽江上游、太湖西部和洪泽湖西部这3个研究区土壤及沉积物氮磷的总量和有效态特征进行了研究，分析了自然环境与人类活动方式对区域环境差异的影响.结果表明，太湖西部研究区土壤氮磷总量均高于其他两个流域，洪泽湖西部研究区沉积物氮磷含量均高于土壤.研究区有效态氮磷的分布趋势整体与总氮总磷分布趋势一致，太湖西部与洪泽湖西部的有效态氮磷占比高于闽江上游流域，沉积物有效态氮磷占比高于土壤.土壤及沉积物理化性质如pH值、有机质及铁铝氧化物对氮磷元素及其有效态的影响较大，但不同流域的影响程度存在差异.不同流域的自然环境及人类活动方式明显影响了滨岸带氮磷的分布，人类活动方式对氮磷形态的影响更为显著. |
| 英文摘要 |
| In order to explore the characteristics and environmental significance of available nitrogen and phosphorus in different land-water transition zones, soil and sediment samples from three study areas, including the upstream watershed of Minjiang River (MJU), western watershed of Hongze Lake (HZW), and western watershed of Taihu Lake (THW), were collected and analyzed. The results showed that the contents of total nitrogen and phosphorus in THW were higher than those of other two study areas. The contents of nitrogen and phosphorus in sediments were higher than those in soils of HZW. The distribution trend of available nitrogen and available phosphorus was generally consistent with the distribution trend of total nitrogen and phosphorus. The proportions of available nitrogen and phosphorus in THW and HZW were much higher than those in MJU, and the proportions of available nitrogen and phosphorus in sediments were higher than those in soils. The physiochemical properties such as pH value, organic matter, and iron and aluminum oxides were related to the available nitrogen and phosphorus in the soil and sediment, but correlations between them were complex. The distribution patterns of available nitrogen and phosphorus in the soil and sediments of the land-water transition zone reflect the impacts of the natural environment and human activities, particularly those of the latter. |
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