| 青藏铁路沿线土壤有机碳含量变异特征分析 |
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| 引用本文： | 李晓明,崔明,周金星,方健梅.青藏铁路沿线土壤有机碳含量变异特征分析[J].林业资源管理,2011(5). |
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| 作者姓名： | 李晓明 崔明 周金星 方健梅 |
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| 作者单位： | 中国林科院荒漠化研究所,北京,100091 |
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| 摘 要： | 土壤有机碳是陆地碳库的重要组成部分,青藏高原作为全球的敏感区域,其土壤有机碳库的变化对研究全球变化具有重要意义。本研究选取青藏铁路格尔木至当雄段,设置20条样带177个样地,进行了实地调查,并对取回的土壤样品进行室内土壤理化性质分析,得到包括土壤有机碳含量、土壤pH值、海拔高度、土层厚度、土壤机械组成、土壤温度、植被盖度等在内的相关数据。采用方差分析和逐步回归分析的方法,分析了青藏铁路沿线的土壤有机碳含量与土层厚度、土壤pH值、海拔高度、土壤机械组成、土壤温度、植被盖度等因素的关系,结果表明,青藏铁路沿线土壤有机碳含量主要受到土壤pH值和植被盖度的影响。本研究为综合分析青藏铁路沿线土壤有机碳含量变化特征和进一步研究铁路运营对沿线环境影响提供了本底数据和重要依据。
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| 关 键 词： | 青藏铁路 土壤有机碳 方差分析 逐步回归分析 |
Analysis of Variation Characteristics of Soil Organic Carbon Content along the Qinghai -Tibet Railway |
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| 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 Management,2011(5). |
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| Authors: | LI Xiaoming CUI Ming ZHOU Jinxing FANG Jianmei |
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| 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. |
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| Keywords: | Qinghai-Tibet Railway soil organic carbon variance analysis stepwise regression analysis |
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