辉河湿地河岸带土壤养分与酶活性特征及相关性研究

发布时间：2018-04-13 05:41

本文选题：辉河湿地 + 河岸带　；参考：《土壤》2017年01期

【摘要】：以辉河湿地国家自然保护区内核心区为研究区,通过野外采样和室内分析相结合的方法,研究土壤养分和酶活性特征以及二者间的相关性。结果表明,随着距河岸距离的增大以及高程的增加,辉河湿地河岸带土壤理化性质发生明显的梯度变化,土壤全氮、全磷和有机质含量从岸边芦苇带到岸坡草本植物带呈先增大后下降的变化趋势,而土壤含水量呈下降趋势。同时,土壤酶活性(碱性磷酸酶、脲酶)也随着植被群落的陆向演替,呈现出一定的差异和变化规律,整体呈增大趋势,其活性与全氮、全磷、有机质呈极显著正相关(P0.01),与土壤含水量呈极显著负相关(P0.01)。综合分析表明,辉河湿地河岸带土壤酶活性不仅与土壤性质有关,与水文状况、微地形、植被演替也密切相关。
[Abstract]:Taking the core area of Huihe Wetland National Nature Reserve as the research area, the characteristics of soil nutrient and enzyme activity and the correlation between them were studied by means of field sampling and indoor analysis.The results showed that with the increase of the distance from the river bank and the elevation, the soil physical and chemical properties of Huihe wetland riparian zone changed obviously, and the soil total nitrogen changed.The contents of total phosphorus and organic matter increased first and then decreased, while the soil water content decreased from the Reed on the shore to the herbaceous belt on the bank slope.At the same time, the soil enzyme activity (alkaline phosphatase, urease) also showed certain difference and change law with the succession of vegetation community, and its activity and total nitrogen, total phosphorus showed an increasing trend.There was a very significant positive correlation between organic matter and soil moisture content, and a very significant negative correlation between organic matter and soil water content.The comprehensive analysis shows that the soil enzyme activity in the riparian zone of Huihe wetland is not only related to soil properties, but also to hydrological conditions, microtopography and vegetation succession.
【作者单位】：北京林业大学草地资源与生态研究中心;中国环境科学研究院;内蒙古辉河国家级自然保护区管理局;
【基金】：国家科技支撑计划项目(2015BAC06B01) 环保公益性行业科研专项项目(201509040)资助
【分类号】：S154.2;S158

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