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林业科学 ›› 2004, Vol. 40 ›› Issue (1): 18-23.doi: 10.11707/j.1001-7488.20040103

• 论文及研究报告 • 上一篇    下一篇

西藏色季拉山急尖长苞冷杉林生态系统的元素降水输入研究

辛学兵 王景生 翟明普   

  1. 中国林业科学研究院林业研究所,北京100091;西藏农牧学院高原生态研究所,林芝860000;北京林业大学资源与环境学院,北京100083
  • 收稿日期:2003-01-20 修回日期:1900-01-01 出版日期:2004-01-25 发布日期:2004-01-25

A Study on Inputs of Nutrients into Abies smithii Forest Ecosystem from Precipitation in Sejila Mountain in Tibet

Xin Xuebing,Wang Jingsheng,Zhai Mingpu   

  1. Forestry Research Institute, The Chinese Academy of Forestry Beijing100091;Institute of Plateau Ecology, Tibet Agriculture and Animal Husbandry College Linzhi860000;College of Resources and Environments, Beijing Forestry University Beijing100083
  • Received:2003-01-20 Revised:1900-01-01 Online:2004-01-25 Published:2004-01-25

摘要:

2000—2001年在西藏色季拉山对急尖长苞冷杉林生态系统进行了大气降水的连续观测,并对降水的元素和离子含量进行了常规分析。结果表明:急尖长苞冷杉林生态系统的大气降水中化学元素输入量的大小顺序为:Zn >N >Mg >Fe >Ca >P >Na >K ,各元素的输入量分别为25.1、23.3、8.1、4. 1、1. 9、0.4、0.026、0.00 7kg·hm-2a-1 ;SO42- 、HCO3-和Cl-的输入量分别为742.6、74.3和51. 6kg·hm-2a-1 ;养分的输入以降雨为主。林冠淋溶是以Na元素为主,而树干淋溶则是以P元素为主。林冠对Fe、Zn、HCO3- 、Cl- 、N、SO42-等元素和离子有吸收作用。

关键词: 西藏, 急尖长苞冷杉, 生态系统, 营养元素的降水输入

Abstract:

A study on precipitation in the Abies smithii forest ecosystem of Mountain Sejila in Tibet has been done in the year of 2000—2001. Contents of the nutrient elements and ions of precipitation have been analysed. The results showed: the content and input of nutrients from precipitation in the Abies smithii forest ecosystem of Mountain Sejila in Tibet were Zn >N >Mg >Fe >Ca >P >Na >K. The input quantities were 25.1、23.3、8.1、4.1、1.9、0.4、0.026、0.007 kg·hm-2a-1 respectively, and the input quantities of SO42-、HCO3-and Cl- were 742.6、74.3 and 51.6 kg·hm-2a-1 respectively. The main nutrient inputs were from rainfall. The main element in eluviations from forest canopy was the element Na, but that from tree trunks was the element P. The forest canopy possessed absorption capabilities upon the elements and/or ions of Fe, Zn, HCO3-, Cl-, N, SO42-and so on.

Key words: Tibet, Abies smithii, Ecosystem, Nutrient inputs from precipitation