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黑土区坡耕地与坡林地表土团聚体有机碳库差异

李露 曹伟 赵鹏志 王恩姮

李露, 曹伟, 赵鹏志, 王恩姮. 黑土区坡耕地与坡林地表土团聚体有机碳库差异[J]. 北京林业大学学报, 2016, 38(12): 46-53. doi: 10.13332/j.1000-1522.20160078
引用本文: 李露, 曹伟, 赵鹏志, 王恩姮. 黑土区坡耕地与坡林地表土团聚体有机碳库差异[J]. 北京林业大学学报, 2016, 38(12): 46-53. doi: 10.13332/j.1000-1522.20160078
LI Lu, CAO Wei, ZHAO Peng-zhi, WANG En-heng.. Differences of soil organic carbon storage in surface soil aggregates between sloping farmland and sloping forestland in black soil region.[J]. Journal of Beijing Forestry University, 2016, 38(12): 46-53. doi: 10.13332/j.1000-1522.20160078
Citation: LI Lu, CAO Wei, ZHAO Peng-zhi, WANG En-heng.. Differences of soil organic carbon storage in surface soil aggregates between sloping farmland and sloping forestland in black soil region.[J]. Journal of Beijing Forestry University, 2016, 38(12): 46-53. doi: 10.13332/j.1000-1522.20160078

黑土区坡耕地与坡林地表土团聚体有机碳库差异

doi: 10.13332/j.1000-1522.20160078
基金项目: 

“十二五”国家科技支撑计划课题(2015BAD07B05)、国家自然科学青年科学基金项目(41302222)、林业公益性行业科研专项(201404202)、大学生创新训练计划项目(201410225067)。

详细信息
    作者简介:

    李露。主要研究方向:土壤侵蚀与土地生产力恢复。Email: 296179031@qq.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: 王恩姮,副教授。主要研究方向:土壤侵蚀与水土保持。 Email: enheng_wang@nefu.edu.cn 地址:同上。

    李露。主要研究方向:土壤侵蚀与土地生产力恢复。Email: 296179031@qq.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: 王恩姮,副教授。主要研究方向:土壤侵蚀与水土保持。 Email: enheng_wang@nefu.edu.cn 地址:同上。

Differences of soil organic carbon storage in surface soil aggregates between sloping farmland and sloping forestland in black soil region.

  • 摘要: 以东北黑土区典型坡耕地(玉米)和坡林地(退耕还落叶松林和樟子松林)表层土壤为研究对象,分别在坡上、坡中上、坡中、坡中下、坡下5个坡位设置取样点采集非原状土,风干后将土壤筛分为2~5 mm、1~2 mm、0.5~1 cm、0.25~0.5 mm、0.25 mm 5个粒级团聚体,分别计算每个粒级土壤风干团聚体所占比例,测定各粒级土壤风干团聚体有机碳含量,并以此为基础计算土壤团聚体有机碳贮量。通过对比不同坡位、各粒级风干团聚体组成及其有机碳含量与贮量变化规律,探明黑土区不同土地利用方式下坡地土壤团聚体有机碳库对不同侵蚀类型的响应特征。结果表明:坡耕地土壤团聚体迁移、沉积过程不同于坡林地,耕地土壤2 mm团聚体的组成比例显著高于2种林地,并在坡下达到最高值(70.30%);有机碳含量均随团聚体粒级减小逐渐增加,樟子松林地内各粒级有机碳含量(25.57~142.60 g/kg)显著高于耕地(22.58~30.06 g/kg)和退耕还落叶松林地(21.58~66.53 g/kg);坡林地土壤团聚体有机碳贮量由坡上至坡下逐渐增加,相同坡位处土壤团聚体有机碳贮量均为樟子松林地退耕还落叶松林地耕地。研究结果证实了黑土区耕作侵蚀的存在及其对土壤团聚体、团聚体有机碳库分布的影响,同时印证了退耕还林是减缓坡地黑土耕作侵蚀、提升有机碳库的长效途径。

     

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  • 收稿日期:  2016-03-01
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