地理学报 ›› 2000, Vol. 67 ›› Issue (5): 533-544.doi: 10.11821/xb200005003

• 论文 • 上一篇    下一篇

中国土壤有机碳库及空间分布特征分析

王绍强1, 周成虎1, 李克让1, 朱松丽2, 黄方红1   

  1. 1. 中国科学院地理科学与资源研究所资源与环境信息系统国家重点实验室,北京100101;
    2. 北京师范大学环境科学研究所,北京100875
  • 收稿日期:2000-05-15 修回日期:2000-07-10 出版日期:2000-09-15 发布日期:2000-09-15
  • 基金资助:
    中国科学院“九五”重大A类项目(KZ95T-03-02-04);国家重点科技攻关专题项目(96-911-01-01)

Analysis on Spatial Distribution Characteristics of Soil Organic Carbon Reservoir in China

WANG Shao qiang1, ZHOU Cheng hu1, LI Ke rang1, ZHU Song li2, HUANG Fang hong1   

  1. 1. The State Key Laboratory of Resources and Environment Information System, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China;
    2. Institute of Environmental Science, Beijing Normal University, Beijing 100875, China
  • Received:2000-05-15 Revised:2000-07-10 Online:2000-09-15 Published:2000-09-15
  • Supported by:
    The Key Project of Chinese Academy of Science,No.KZ95T-03-02-04;and the Key Project of State Science Technique,No.96-911-01-01

摘要: 土壤有机碳库是陆地碳库的主要组成部分,在陆地碳循环研究中有着重要的作用。根据中国第二次土壤普查实测2473个典型土壤剖面的理化性质,以及土壤各类型分布面积,估算中国土壤有机碳库的储量约为924.18×108t,平均碳密度为10.53kg/m2,表明中国土壤是一个巨大的碳库。其空间分布总体规律上表现为:东部地区大致是随纬度的增加而递增,北部地区呈现随经度减小而递减的趋势,西部地区则呈现随纬度减小而增加的趋势。

关键词: 碳循环, 全球变化, 土壤有机碳库

Abstract: The paper respectively adopted physiochemical properties of every soil stratum from2 473 soil profiles of the second soil survey. The corresponding carbon content of soil is estimated by utilizing conversion coefficient 0 58. First, we calculated the carbon content of every stratum of different soil stirp in the same soil subtype. Then, we took soil stratum depth as weight coefficient to acquire the average physiochemical properties of various kinds of soil stirp. Finally, we got the average depth, organic content, duck density and carbon density of different soil subtypes through area averaging. The total carbon quantity of different kinds of soil can be calculated by the following expression: C j=0 58S jH jO W j where j is the soil type, C j is the carbon storage of j soil type, S j is the distribution area of j soil type, H j is the average depth of j soil type, O j is the average organic content of j soil type, and W j is the average bulk density of j soil type. In the second soil survey, the total amount of soil organic carbon is about 924 18?10 8 t and carbon density is about 10 53 kgC/m2 in China according to the statistic country area 877 63?106hm2. The spatial distribution characteristics of soil organic carbon in China are that the carbon storage increases with the increase of latitude in eastern China and the carbon storage decreases with the decrease of longitude in northern China. There is a transition zone where carbon storage varies greatly in China. Moreover, there is an increasing tendency of carbon density with the decrease of latitude in western China. Soil circle has implications on global change, but the difference in soil spatial distribution is substantial in China. Because the structure of soil is inhomogeneous, mistakes will be resulted in estimating soil carbon reservoir. It is thus necessary to farther resolve soil respiration, organic matter conversion and others related problems, and build uniform and normal methods of measurment and sampling.

Key words: terrestrial ecosystem, global change, soil carbon reservoir, carbon cycle

中图分类号: 

  • S153.6