2025年 04期

Nitrogen Contents and Isotopes of Mosses for Indicating Atmospheric Nitrogen Deposition at Mount Tai and Mount Meng


摘要(Abstract):

为了调查空间尺度上区域大气氮沉降的特征及其污染来源,利用苔藓氮含量和氮同位素比值构建同位素质量平衡方程,评估了泰山、蒙山地区大气氮污染的水平和来源。结果表明:苔藓氮含量在泰山和蒙山之间没有显著差异,蒙山苔藓氮同位素比值比泰山明显偏负;泰山、蒙山地区大气氮湿沉降通量分别为26.3、 28.8 kg/(ha·a),高于最易受影响的陆地生态系统石南灌丛的大气氮沉降阈值5~10 kg/(ha·a),以及酸性针叶林的大气氮沉降阈值15~20 kg/(ha·a),属于高氮沉降地区。2个地区大气氮沉降的主要来源不同,泰山氮沉降受城市氮源影响显著,其硝态氮沉降水平较高;蒙山氮沉降主要受到农业氮源的影响,其铵态氮沉降通量远高于硝态氮沉降通量。

关键词(KeyWords):大气氮沉降;氮同位素;生物指示;苔藓;泰山;蒙山

基金项目(Foundation):国家自然科学基金项目(42003011)

作者(Author): 李佳伊,王阳,邓同玥,董玉平

DOI: 10.13349/j.cnki.jdxbn.20250522.002

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