东北地区旱地土壤有机碳密度的主控自然因素研究
Main natural factors controlling soil organic carbon density in the uplands of Northeast China
查看参考文献25篇
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文摘
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土壤有机碳(SOC)库在陆地生态系统中具有重要作用.基于全国第二次土壤普查获得的1 022个东北地区旱地土壤剖面数据,采用方差分析和回归分析方法分析了年均温、年均降水量、成土母质、土壤质地和pH值对旱地SOC密度的影响.结果表明,各因子对东北地区旱地SOC密度在表层和剖面均有显著影响.在5个自然因子中,对SOC密度变异程度的独立解释能力最大的在表层为气温,达32%,剖面为土壤质地,为28.7%.5个自然因子的综合作用分别能解释旱地表层和剖面SOC密度变异的51.2%和50.2%.其中,气温和土壤质地是影响东北地区旱地SOC密度的主要自然因子.因此,合理利用自然条件有利于该区旱地SOC的积累. |
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其他语种文摘
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Soil organic carbon pool plays an important role in the terrestrial ecosystems. The effect of mean annual temperature (MAT), mean annual precipitation (MAP), parent material, and soil texture and pH value on SOC density in the uplands of Northeast China was examined with the analysis of variance and regression analysis, using the data of 1 022 profiles obtained from the Second National Soil Survey of China. The results indicated that, SOC density in the uplands of Northeast China was significant affected by all these factors, and MAT has the largest ability to independently explain the variability of SOC density in the surface layer, about 32%, while soil texture in the profile layer, about 28.7%. All these 5 natural factors can explain 51.2% and 50.2% variability of SOC density in the surface and profile layers, respectively. Among these 5 factors, climate and soil texture are the main natural factors controlling SOC density in the uplands of Northeast China. Therefore, it is benefit for SOC accumulation to make use of natural conditions rationally in the uplands. |
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来源
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生态环境学报
,2009,18(3):1049-1053 【扩展库】
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关键词
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土壤有机碳密度
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主控自然因素
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旱地
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东北地区
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地址
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中国科学院南京土壤研究所, 土壤与农业可持续发展国家重点实验室, 江苏, 南京, 210008
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语种
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中文 |
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文献类型
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研究性论文 |
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ISSN
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1674-5906 |
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学科
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环境科学基础理论 |
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基金
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国家自然科学基金创新研究群体项目
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中国科学院知识创新工程重大项目
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中国科学院知识创新工程领域前沿项目
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文献收藏号
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CSCD:3695698
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