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Plant Diversity ›› 1995, Vol. 17 ›› Issue (02): 1-3.

• 研究论文 •    

哀牢山北部木果石栎林的元素积累及循环

刘文耀 谢寿昌 谢克金 李寿昌   

  1. 中国科学院昆明生态研究所
  • 出版日期:1995-04-25 发布日期:1995-04-25

STUDY ON THE ACCUMULATION AND BIOLOGICAL CYCLES OF CHEMICAL ELEMENTS IN LITHOCARPUS XYLOCARPUS FOREST IN NORTH SIDE OF AILAO MOUNTAIN

LIU Wen-Yao XIE Shou-Chang XIE Ke-Jin LI Shou-Chang   

  1. Kunming Institute of Ecology, Chinese Academy of Sciences
  • Online:1995-04-25 Published:1995-04-25

摘要: 根据对哀牢山北部徐家坝地区木果石栎林化学元素的吸收、分布及其生物循环的研究结果表明,碳素在树干中含量最高,而其它元素的含量均以叶片最高,枝和根其次,树干最低。该森林群落中碳、氮、磷、钾、钙、镁、锰、钠、铝和铁元素的积累量达260 346kg/hm2,其中乔木层的元素积累量占该群落元素总积累量的98.5%,灌木层和草本层的元素积累量仅分别占1.3%和0.2%。在该群落中各元素的积累量以碳>钙>氮>钾>镁>铝>磷>钠>铁>锰为序。碳、钙和氮在树干中积累最多,铁和钾在根系中积累较多。土壤中碳、氮和铝的贮量较高,磷、镁和钾较少。该群落元素的年吸收量分别为:碳8409,氮84,磷10,钾56,钙92,镁19,锰10,铝12和铁5kg/hm2. 通过凋落物每年归还给土壤的元素总量的约3872kg/hm2,其中以碳、钙和氮的归还量最多,分别占年总归还量的95.7%,1.4%和1.4%。在该群落中各元素的循环周转期分别为:碳69年,氮29年,磷46年,钾48年,钙38年,镁刀年,锰19年,铝60年和铁184年。

关键词: 木果石栎林, 化学元素, 积累量, 生物循环

Abstract: The paper deals with the absorption, distribution and biological cycles of chemical el-ements in L. xylocarpus forest in north side of Ailao Mountain, Yunnan province. The results show that C is the most abundant element in the various plants of the forest community, especially in the trunk of trees. The content of inorganic elements from leaves, branches, roots and trunk graduately declined. The accumulation of chemical elements in the community .are estimated 260 346kg/ hm2, in which the accumulation ofchemical elements in tree layer account for 98.7 of the total. The accumulation of chemical elements in the community decreases in the order of OCa>N>Mg>Al>P>Na>Fe>Mn. C, Ca and N are stored mainly in trunk. Al and Fe are stored mainly in roots.

Key words: Lithocarpus xylocarpus forest