Analysis of Variation Characteristics of Soil Organic Carbon Content along the Qinghai-Tibet Railway

Abstract

Abstract: Soil organic carbon is the main part of terrestrial carbon reservior.The dynamic change of soil organic carbon storage of the Tibetan Plateau,as one of the most sensitive areas in the world,plays an essential role in the study of global change.The paper reports a research that attempts to analyze the variation characteristics of soil organic carbon content along the Qinghai-Tibet railway between Ge’ermu and Damxung.Data from 177 soil profiles of 20 transects,through field investigation and laboratory analysis,were collected,including altitude,vegetation coverage,soil organic carbon content,soil pH values,soil texture,and soil temperature.And the variance and stepwise regression analysis were employed to analyze the relationship of soil organic carbon content with soil depth,soil pH values,altitude,soil texture,soil temperature and vegetation coverage.The results indicated that soil organic carbon content along the Qinghai-Tibet Railway was primarily affected by the soil pH value and vegetation coverage.This study also provides data to support the further analysis of soil organic carbon dynamic change along the Qinghai-Tibet Railway and the impact of its running on the environment alongside.

Key words: Qinghai-Tibet Railway, soil organic carbon, variance analysis, stepwise regression analysis

CLC Number:

S718.516

LI Xiaoming, CUI Ming, ZHOU Jinxing, FANG Jianmei. Analysis of Variation Characteristics of Soil Organic Carbon Content along the Qinghai-Tibet Railway[J]. FOREST RESOURCES WANAGEMENT, 2011, (5): 41-46.

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