中国的冻土
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GELISOLS OF CHINA
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    摘要:

    中国冻土面积大,分布规律特殊,对于研究世界冻土的形成、分布具有重要意义。中国冻土有高纬度冻土和高海拔冻土两种。高纬度冻土分布于东北地区,北纬53—46°N,面积38.2×104km2,纬度高而海拔较低,这类冻土的一系列特征主要受高纬度的影响;高海拔冻土主要分布于青藏高原和西部高山,面积176×104km2,占北半球高海拔冻土面积的75.7%,居世界首位,大部分分布于北纬35°N以南,最南达27°左右,纬度低而海拔高,其一系列特征主要受海拔高度的影响。两类冻土的土壤类型和性状各具特点,差异很大。高纬度冻土具有湿寒特点,植被为森林,土壤有机质含量高,pH低,不含CaCO3,盐基不饱和;高海拔冻土具有干寒特点,植被为草原和荒漠,土壤有机质含量很低,PH高,盐基饱和,大多富含石灰,部分含石膏磐层。目前中国及国际上均未将冻土列为独立的土壤分类单元,我们建议在中国土壤中,增设一个冻土土纲,下设正常冻土(高纬度冻土)和高寒冻土(高海拔冻土)两个亚纲。

    Abstract:

    China has a large area of gelisols distributed with a particular pattern, which is of great importance to the research on formaticn and distribution of gelisols in the world. The gelisols of China have two types: high-latitude and high-altitude gelisols. High-latitude gelisols are distributed in the Northeast region, 53-46°N latitude, with an area of 38.2×104km2 As their latitude is high but altitude is low, the scils have a series of characteristics influenced by the high latitude. High-altitude gelisols mainly occur in the Qinghai-Xizang plateau and western high anottutains, with an area of 176×104km2 which accounts for 75.7% of the total area of high-altitude gelisols in the Northern Hemisphere and ranks the first in the world. Most of them are dispersed in the regions south to 35°N latitude, and some even to 27°N latitude. Their location is high in altitude but low in latitude, and their characteristics are affected by the altitude.

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赵其国,王浩清,顾国安.中国的冻土[J].土壤学报,1993,30(4):341-354. Zhao Qiguo, Wang Haoqing, Gu Guoan. GELISOLS OF CHINA[J]. Acta Pedologica Sinica,1993,30(4):341-354.

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  • 在线发布日期: 2013-02-25
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