毛乌素沙地典型湖滨带湿地有机碳、氮素空间分布特征

发布时间：2018-03-19 06:05

本文选题：湖滨带　切入点：有机碳　出处：《南水北调与水利科技》2017年04期 　论文类型：期刊论文

【摘要】：通过对陕西毛乌素沙地典型湖滨带湿地有机碳和氮素的空间分布特征进行研究,为探讨湿地生态系统如何在沙化环境下发挥其特有的功能提供科学依据。在巴吓采当湖泊湖滨带A~F类型区采集土壤,测定土壤的有机碳、全氮、有机氮、硝态氮和铵态氮等指标。利用方差分析、Spearman相关性分析和主成分分析等方法分析对湖滨带有机碳、氮素空间分布特征进行研究。土壤表层0~10cm的有机碳和全氮含量随水位升高呈增加趋势。除了铵态氮外,有机碳、全氮、有机氮和硝态氮含量垂直分布上随着土壤深度增加呈降低趋势。土壤有机碳、全氮含量分别与全磷、土壤容重、含水率、水位显著相关。铵态氮和全磷、含水率、土壤容重、全氮、有机碳和水位等显著相关。硝态氮与微生物生物量碳、氮的相关系数分别为r=0.637和r=0.617(中度正相关)。有机碳及氮素的含量与土壤粘粒含量相关性不高。主成分分析提取3个主成分,累积贡献率达76.15%。土壤全磷、土壤含水率、土壤容重和水位是影响湖滨带土壤有机碳、氮素空间分布的主要因子。
[Abstract]:The spatial distribution characteristics of organic carbon and nitrogen in typical lakeshore wetland of Maowusu sandy land in Shaanxi Province were studied. In order to provide scientific basis for exploring how wetland ecosystem can play its unique function in sandy environment, soil samples were collected from ANAF type area of Badang Lake Lakeside Zone, and soil organic carbon, total nitrogen and organic nitrogen were determined. Nitrate nitrogen and ammonium nitrogen were used to analyze the organic carbon in the lakeside zone by means of Spearman correlation analysis and principal component analysis. The spatial distribution of nitrogen was studied. The content of organic carbon and total nitrogen increased with the increase of water level, except ammonium nitrogen, organic carbon, total nitrogen, total nitrogen, organic carbon, total nitrogen, organic carbon, total nitrogen, total nitrogen, organic carbon, total nitrogen, total nitrogen, organic carbon, total nitrogen, The vertical distribution of organic nitrogen and nitrate nitrogen decreased with the increase of soil depth. Soil organic carbon and total nitrogen content were significantly correlated with total phosphorus, soil bulk density, water content, water level, ammonium nitrogen and total phosphorus, moisture content and soil bulk density, respectively. Total nitrogen, organic carbon and water level are significantly correlated. The correlation coefficients of nitrogen were rn 0.637 and rn 0.617, respectively. The correlation between the contents of organic carbon and nitrogen and soil clay content was not high. Three principal components were extracted by principal component analysis and the cumulative contribution rate was 76.15%. Soil bulk density and water level are the main factors affecting the spatial distribution of soil organic carbon and nitrogen in the lakeside zone.
【作者单位】：西北农林科技大学理学院;西北农林科技大学资源环境学院;中国科学院水利部水土保持研究所/黄土高原土壤侵蚀与旱地农业国家重点实验室;
【基金】：中央高校基本科研业务费专项(2452015094) 中央财政农业技术推广专项:水利部公益性行业科研专项(201501045)~~
【分类号】：S153.6

【相似文献】