气候变化及人类活动对中国土壤有机碳储量的影响

doi:10.11821/xb200305011

地理学报 ›› 2003, Vol. 58 ›› Issue (5): 727-734.doi: 10.11821/xb200305011

气候变化及人类活动对中国土壤有机碳储量的影响

周涛¹, 史培军¹, 王绍强²

1. 北京师范大学环境演变与自然灾害教育部重点实验室，北京师范大学资源科学研究所，北京 100875；
2. 中国科学院地理科学与资源研究所，北京 100101

收稿日期:2002-11-15 修回日期:2003-04-12 出版日期:2003-09-25 发布日期:2003-09-25
作者简介:周涛 (1972-), 男, 博士, 湖南冷水江人。主要从事土地利用/土地覆被变化与碳循环方面的研究, 已发表论文10余篇。Email: zhoutao13@263.net
基金资助:
国家重点基础研究发展规划项目 (G1999043404)；国家重点基础研究发展规划项目(2002CB412501)；北京师范大学青年基金 (107192)

Impacts of Climate Change and Human Activities on Soil Carbon Storage in China

ZHOU Tao¹, SHI Peijun¹, WANG Shaoqiang²

1. Key Laboratory of Environmental Change and Natural Disaster, Ministry of Education of China; Institute of Resources Science, Beijing Normal University, Beijing 100875, China;
2. Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China

Received:2002-11-15 Revised:2003-04-12 Online:2003-09-25 Published:2003-09-25
Supported by:
National Key Project for Basic Research, No.G1999043404; National Key Basic Research and Development Program, No. 2002CB412501; Youth Fund of Beijing Normal University, No.107192

摘要/Abstract

摘要：

对中国1998年第二次土壤普查中的2000多个土壤剖面中碳储量与年平均温度 (T)、年降水量 (P) 的相关性研究表明：它们之间的相关性在不同的温度带下具有很大的差异，在T ≤10^oC的地区，土壤有机碳储量与温度的负相关性最强；在10^oC< T ≤ 20^oC的地区，受与降水正相关的影响，土壤有机碳储量与年平均温度表现出一种正相关性；而在T > 20^oC的地区，土壤有机碳储量与温度和降水的相关性都很差。由于温度和降水在中国存在很强的正相关性，因此在相关分析中宜采用偏相关分析方法。受人类耕种的影响，耕地土壤有机碳储量与温度、降水相关性远低于非耕地土壤。对具有相同土壤属性和气候条件的同一地区的耕地土壤与非耕地土壤样本进行的配对检验表明，耕地土壤与非耕地土壤有机碳储量之间存在显著差异，土地利用的改变在总体上导致了土壤碳的释放。

关键词: 土壤有机碳储量, 气候, 人类活动, 偏相关, 耕地, 中国

Abstract:

More than 2000 soil samples obtained from the second soil census in China in the year 1998 were applied to analyse the correlations of soil organic carbon storage (SOC) and climatic factors, including annual mean temperature (T), and sum of precipitation (P). The results show that: (1) the correlations are quite different in different temperature zones. In the area where T ≤10^oC, the correlation between SOC and temperature has the strongest negative correlation. In the area where 10^oC < T ≤20^oC, a positive correlation appears under the influence of precipitation. In the area where T > 20 ^oC, the correlation between SOC and temperature and precipitation is inadequate. (2) Due to the strong positive correlation between temperature and precipitation in China, the partial correlation method is thus better than Pearson correlation method. (3) The correlation between SOC and temperature and precipitation in cultured soil is weaker than that of non-cultured soil, which could attribute to human activities. (4) 26 pairs of soil samples, each pair coming from the same place which has the same soil properties and the same climatic condition, and consisting of one sample in cultured soil and the other in non-cultured soil, are used to analyse the difference of soil organic carbon storage between cultured and non-cultured soil. The results show that the differences of SOC are significant in two types of soils, and as a whole there is certain SOC released to the atmosphere as forest or grassland is converted to cropland.

Key words: soil organic carbon storage, climate, human activities, partial correlation, cultured soil, China

周涛,史培军,王绍强. 气候变化及人类活动对中国土壤有机碳储量的影响[J]. 地理学报, 2003, 58(5): 727-734.

ZHOU Tao, SHI Peijun, WANG Shaoqiang. Impacts of Climate Change and Human Activities on Soil Carbon Storage in China[J]. Acta Geographica Sinica, 2003, 58(5): 727-734.

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气候变化及人类活动对中国土壤有机碳储量的影响

Impacts of Climate Change and Human Activities on Soil Carbon Storage in China

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