期刊文献+

开垦对海北高寒草甸土壤有机碳的影响 被引量:27

Effects of reclamation on soil organic carbon in Haibei alpine meadow
在线阅读 下载PDF
导出
摘要 在中国科学院海北高寒草甸生态系统定位站地区,选择高寒草甸开垦后形成的农田(种植春油菜)作为研究对象,开垦年限分别为0、10、20和30年,利用土壤有机碳密度分组法,对0~10 cm、10~20 cm、20~30 cm、30~40 cm土层土壤有机碳(SOC)及不同组分(轻组有机碳LFOC,重组有机碳HFOC)含量及随开垦年限变化关系进行了研究。结果表明,高寒草甸开垦后土壤有机碳及其组分的变化主要发生在0~10 cm土层,LFOC下降最快,其次为HFOC和SOC,至30年时分别下降了48.63%、43.97%、37.64%。而0~40 cm土体内,SOC、LFOC和HFOC亦呈下降趋势,开垦30年,它们的下降速率分别为785.77、16.79和460.29 kg C.hm-2.yr-1。开垦将大大降低高寒草甸作为碳汇的功能,土壤碳库的总贮量由143 516.94 kg C.hm-2.yr-1下降至114 298.34 kg C.hm-2.yr-1,使其逆转为碳源。 With rapeseed fields having been reclaimed from alpine meadow for 0,10,20 and 30 years at the Haibei Research Station,Chinese Academy of Sciences as test objects,this paper studied the changes of soil organic carbon(SOC) and its fractions including light fraction organic carbon(LFOC) and heavy fraction organic carbon(HFOC)) in 0~10,10~20,20~30 and 30~40 cm soil layers with reclamation duration.The results showed that after the alpine meadow reclaimed,the changes of SOC and its fractions mainly occurred in 0...
出处 《生态学杂志》 CAS CSCD 北大核心 2006年第8期911-915,共5页 Chinese Journal of Ecology
基金 国家自然科学基金项目(40471133) 中国科学院知识创新工程重大项目(KZCX1-SW-01) 中国科学院资源环境领域野外台站研究基金资助项目。
关键词 开垦 高寒草甸 农田 土壤有机碳 轻组有机碳 reclamation alpine meadow cropland soil organic carbon light fraction.
  • 相关文献

参考文献13

  • 1[7]Aguilar R,Kelly EF,Heil RD.1988.Effects of cultivation on soils in northern Great Plains rangeland[J].Soil Sci.Soc.Am.J.,52:1081~1085.
  • 2[8]Blair GJ,Lefroy RDB.1995.Soil C fractions based on their degree of oxidation and the development of a C management index for agricultural systems[J].Aust.J.Agri.Res.,46:1459~1466.
  • 3[9]Davidson EA,Ackerman IL.1993.Changes in soil carbon inventories following cultivation of previously un-tilled soils[J].Biogeochemistry,20:161~193.
  • 4[10]Eswaran H,Van den Berg E,Reich P.1993.Organic carbon in soils of the world[J].Soil Sci.Soc.Am.J.,57:192~194.
  • 5[11]Houghton RA.1995.Changes in the storage of terrestrial carbon since 1850[A].Soils and Global Change[C].Boca Raton,Florida:CRC Press,Inc.45~65.
  • 6[12]Janzen HH.1987.Soil organic matter characteristics after long term cropping to various spring wheat rotations[J].Can.J.Soil Sci.,67:845~856.
  • 7[13]Jendinson DS,Adamas DE,Wild A.1991.Model estimated of CO2 emissions from soil in response to global warming[J].Nature,351:304~306.
  • 8[14]Post WM,Emanuel WR,Zinke PJ,et al.1982.Soil carbon and world life zones[J].Nature,298:156~159.
  • 9[15]Schlesinger WH.1977.Carbon balance in terrestrial detritus[J].Annu.Rev.Ecol.Syst.,8:51~81.
  • 10[16]Schlesinger WH.1995.An overview of global carbon cycle[A].In:Lai R,eds.Soils and Global Change[C].Boca Raton,Florida:CRC Press,Inc.9~25.

同被引文献542

引证文献27

二级引证文献396

相关作者

内容加载中请稍等...

相关机构

内容加载中请稍等...

相关主题

内容加载中请稍等...

浏览历史

内容加载中请稍等...
;
使用帮助 返回顶部