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长白山高山冻原生态系统磷硫生物循环的研究

魏晶1 吴钢1 王欢1 郝莹婕2 尚文艳1   

  1. 1中国科学院生态环境研究中心系统生态重点实验室,北京 100085;2山西省平遥县乡建设局,平遥 031100
  • 收稿日期:2004-10-02 修回日期:2005-02-25 出版日期:2005-07-18

Phosphorus and sulphur bio-cycling in alpine tundra ecosystem of Changbai Mountains

WEI Jing,WU Gang,WANG Huan,HAO Yingjie,SHANG Wenyan   

  1. Key Laboratory of Systems Ecology,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085,China
  • Received:2004-10-02 Revised:2005-02-25 Online:2005-07-18

摘要: 利用分室模型对长白山高山冻原生态系统磷硫生物循环进行了研究.结果表明,长白山高山冻原植被-土壤系统中总磷和总硫净储存分别为16 088.6 t和26 079.4 t,其中土壤库分别占99.2%和99.5%.磷硫在土壤库、凋落物库和植被库的分布极不平衡,储量分别是:植被库中磷46.14 t、硫64.82 t,其中地上部分储存磷21.88 t、硫44.21 t,地下根系储存磷24.28 t、硫20.61 t,在植物亚系统中47.4%的磷和68.2%的硫储存在地上部分中;凋落物库中磷89.63 t、硫53.16 t;土壤库中磷15 952.8 t、硫26 014.6 t.长白山高山冻原植被-土壤系统中,磷年吸收量和年凋落物归还量分别为24.25和31.59 t;硫在地上植物活体、地下根系中年转移量和年凋落物归还量分别为31.18、10.12和21.06 t,硫自然归还率为67.5%.

关键词: 大豆, 品种生态区, 生态类型

Abstract: The study with compartment model on the phosphorus (P) and sulphur (S) bio-cycling in alpine tundra ecosystem of Changbai Mountains showed that the total storage of P and S was 16088.6 t and 26079.4 t,of which,46.14 t and 64.82 t was in vegetation pool,89.63 t and 53.16 t in litterfall pool,and 15952.8 t and 26 014.6 t in soil pool,respectively.The above?and below-ground vegetation pool stored 21.88 t and 44.21 t,and 24.28 t and 20.61 t of P and S,respectively, and the above-ground vegetation pool had 47.4% of P and 68.2% of S in the vegetation subsystem.The transferable P amount was 24.25 t·yr-1 through plant absorption and 31.59 t·yr-1 through litterfall return,while the transferable S amount was 31.18 t·yr-1,10.12 t·yr-1 and 21.06 t·yr-1 in the above-ground plant, below-ground root system,and litterfall return, respectively. The natural return ratio of S was 67.5%.

Key words: Soybean, Ecological regions, Ecological types