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OALib Journal期刊
ISSN: 2333-9721
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青藏高原腹地溪流中的氮和有机碳及其相互关系
DOI: 10.3724/SP.J.1145.2013.00532, PP. 532-536
Keywords: 有机碳,氮,青藏高原,溪流
Abstract:
氮和有机碳都是溪流中非常重要的物质，其相互关系是生物圈中最基本的生物地球化学联系之一.实地调查了青藏高原腹地溪流中氮和有机碳的状况，并对氮和有机碳之间的关系进行了探讨.结果表明，no3-n是青藏高原腹地溪流中总氮（tn）的主要成分，占80.4%.在溪流中tn的变异性小于no3-n的变异性，nh4-n的变异性最大.总有机碳（toc）主要由溶解性有机碳（doc）组成，占86.5%，doc的变异性略大于toc的变异性.溪流水体中的c:n比值很低，平均值仅为2.632，且都低于hillebrand和sommer提出的比值（c:n=119:17），说明溪流中的微生物主要受c限制.有机碳与tn和nh4-n没有显著相关性，与no3-n负相关.no3-n:tn与有机碳负相关，而nh4-n:tn与有机碳没有显著相关性.有机碳与c:n显著正相关，tn和no3-n与c:n显著负相关，nh4-n与c:n无显著相关性.
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