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地形因子和物理保护对张广才岭次生林土壤有机碳密度的影响

周鑫 姜航 孙金兵 崔晓阳

周鑫, 姜航, 孙金兵, 崔晓阳. 地形因子和物理保护对张广才岭次生林土壤有机碳密度的影响[J]. 北京林业大学学报, 2016, 38(4): 94-106. doi: 10.13332/j.1000-1522.20150417
引用本文: 周鑫, 姜航, 孙金兵, 崔晓阳. 地形因子和物理保护对张广才岭次生林土壤有机碳密度的影响[J]. 北京林业大学学报, 2016, 38(4): 94-106. doi: 10.13332/j.1000-1522.20150417
ZHOU Xin, JIANG Hang, SUN Jin-bing, CUI Xiao-yang. Soil organic carbon density as affected by topography and physical protection factors in the secondary forest area of Zhangguangcai Mountains, northeast China[J]. Journal of Beijing Forestry University, 2016, 38(4): 94-106. doi: 10.13332/j.1000-1522.20150417
Citation: ZHOU Xin, JIANG Hang, SUN Jin-bing, CUI Xiao-yang. Soil organic carbon density as affected by topography and physical protection factors in the secondary forest area of Zhangguangcai Mountains, northeast China[J]. Journal of Beijing Forestry University, 2016, 38(4): 94-106. doi: 10.13332/j.1000-1522.20150417

地形因子和物理保护对张广才岭次生林土壤有机碳密度的影响

doi: 10.13332/j.1000-1522.20150417
基金项目: 

“十二五”国家科技支撑计划项目(2011BAD37B0103)、“973”国家重点基础研究发展计划 (2011CB403202)

详细信息
    作者简介:

    周鑫。主要研究方向:森林土壤学。 Email: luomoyuyoushang@163.com 地址:150040 黑龙江省哈尔滨市香坊区和兴路26号东北林业大学林学院。
    责任作者: 崔晓阳,教授,博士生导师。主要研究方向:森林土壤学方面的教学和研究工作。 Email: c_xiaoyang@126.com 地址:同上。

    周鑫。主要研究方向:森林土壤学。 Email: luomoyuyoushang@163.com 地址:150040 黑龙江省哈尔滨市香坊区和兴路26号东北林业大学林学院。
    责任作者: 崔晓阳,教授,博士生导师。主要研究方向:森林土壤学方面的教学和研究工作。 Email: c_xiaoyang@126.com 地址:同上。

Soil organic carbon density as affected by topography and physical protection factors in the secondary forest area of Zhangguangcai Mountains, northeast China

  • 摘要: 在张广才岭西部典型低山丘陵次生林区,按坡位、坡向差异对等设置36块样地,采集1 m深度剖面内不同发生层土样,研究了地形因子(坡位、坡向、坡度)对土壤有机碳含量、有机碳密度的影响,以及土壤有机碳与物理保护因子(黏粒、团聚体)的关系,并借助逐步回归分析量化各地形因子对土壤有机碳密度变异的相对贡献。结果表明,本地区土壤有机碳具有较大的空间变异性,土壤剖面的有机碳密度范围为8.9~31.3 kg/m。土壤有机碳的表聚特征明显,平均而言腐殖质层(A1层)集中了全剖面总有机碳的55.2%。坡位和坡向显著影响土壤有机碳的分布:下坡A1层有机碳密度是上坡的1.83倍,其1 m剖面有机碳密度是上坡的1.67倍, 阴坡A1层有机碳密度是阳坡的1.37倍,其1 m剖面有机碳密度是阳坡的1.17倍。坡度对上、下坡土壤有机碳含量和密度均无显著影响。排除坡位和坡积埋藏层等影响因子后,土壤有机碳含量、有机碳密度与黏粒、团聚体均无显著相关性,因此黏粒保护和团聚体保护并非土壤有机碳积累的控制因子。逐步回归显示,坡位是土壤有机碳数量分异的主控因子,可独立解释A1层有机碳密度空间变异的57.4%与1 m剖面有机碳空间变异的63.2%, 下层土壤埋藏层则是主控因子,可独立解释沉积层(B层)有机碳密度空间变异的63.4%, 黏粒和团聚体作为公认的土壤有机碳物理保护因子,却因贡献较小而在逐步回归过程中被剔除。研究结果可为区域森林土壤碳储量准确估算和碳汇林立地选择提供参考。
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  • 收稿日期:  2015-11-24
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地形因子和物理保护对张广才岭次生林土壤有机碳密度的影响

doi: 10.13332/j.1000-1522.20150417
    基金项目:

    “十二五”国家科技支撑计划项目(2011BAD37B0103)、“973”国家重点基础研究发展计划 (2011CB403202)

    作者简介:

    周鑫。主要研究方向:森林土壤学。 Email: luomoyuyoushang@163.com 地址:150040 黑龙江省哈尔滨市香坊区和兴路26号东北林业大学林学院。
    责任作者: 崔晓阳,教授,博士生导师。主要研究方向:森林土壤学方面的教学和研究工作。 Email: c_xiaoyang@126.com 地址:同上。

    周鑫。主要研究方向:森林土壤学。 Email: luomoyuyoushang@163.com 地址:150040 黑龙江省哈尔滨市香坊区和兴路26号东北林业大学林学院。
    责任作者: 崔晓阳,教授,博士生导师。主要研究方向:森林土壤学方面的教学和研究工作。 Email: c_xiaoyang@126.com 地址:同上。

摘要: 在张广才岭西部典型低山丘陵次生林区,按坡位、坡向差异对等设置36块样地,采集1 m深度剖面内不同发生层土样,研究了地形因子(坡位、坡向、坡度)对土壤有机碳含量、有机碳密度的影响,以及土壤有机碳与物理保护因子(黏粒、团聚体)的关系,并借助逐步回归分析量化各地形因子对土壤有机碳密度变异的相对贡献。结果表明,本地区土壤有机碳具有较大的空间变异性,土壤剖面的有机碳密度范围为8.9~31.3 kg/m。土壤有机碳的表聚特征明显,平均而言腐殖质层(A1层)集中了全剖面总有机碳的55.2%。坡位和坡向显著影响土壤有机碳的分布:下坡A1层有机碳密度是上坡的1.83倍,其1 m剖面有机碳密度是上坡的1.67倍, 阴坡A1层有机碳密度是阳坡的1.37倍,其1 m剖面有机碳密度是阳坡的1.17倍。坡度对上、下坡土壤有机碳含量和密度均无显著影响。排除坡位和坡积埋藏层等影响因子后,土壤有机碳含量、有机碳密度与黏粒、团聚体均无显著相关性,因此黏粒保护和团聚体保护并非土壤有机碳积累的控制因子。逐步回归显示,坡位是土壤有机碳数量分异的主控因子,可独立解释A1层有机碳密度空间变异的57.4%与1 m剖面有机碳空间变异的63.2%, 下层土壤埋藏层则是主控因子,可独立解释沉积层(B层)有机碳密度空间变异的63.4%, 黏粒和团聚体作为公认的土壤有机碳物理保护因子,却因贡献较小而在逐步回归过程中被剔除。研究结果可为区域森林土壤碳储量准确估算和碳汇林立地选择提供参考。

English Abstract

周鑫, 姜航, 孙金兵, 崔晓阳. 地形因子和物理保护对张广才岭次生林土壤有机碳密度的影响[J]. 北京林业大学学报, 2016, 38(4): 94-106. doi: 10.13332/j.1000-1522.20150417
引用本文: 周鑫, 姜航, 孙金兵, 崔晓阳. 地形因子和物理保护对张广才岭次生林土壤有机碳密度的影响[J]. 北京林业大学学报, 2016, 38(4): 94-106. doi: 10.13332/j.1000-1522.20150417
ZHOU Xin, JIANG Hang, SUN Jin-bing, CUI Xiao-yang. Soil organic carbon density as affected by topography and physical protection factors in the secondary forest area of Zhangguangcai Mountains, northeast China[J]. Journal of Beijing Forestry University, 2016, 38(4): 94-106. doi: 10.13332/j.1000-1522.20150417
Citation: ZHOU Xin, JIANG Hang, SUN Jin-bing, CUI Xiao-yang. Soil organic carbon density as affected by topography and physical protection factors in the secondary forest area of Zhangguangcai Mountains, northeast China[J]. Journal of Beijing Forestry University, 2016, 38(4): 94-106. doi: 10.13332/j.1000-1522.20150417
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