He Nianpeng1; Zhang Yunhai2; Dai Jingzhong3; Han Xingguo2; Baoyin Taogetao4; Yu Guirui1
Source Publicationjournalofgeographicalsciences
AbstractTo explore the optimal land-use for soil carbon (C) sequestration in Inner Mongolian grasslands, we investigated C and nitrogen (N) storage in soil and soil fractions in 8 floristi- cally and topographically similar sites which subjected to different land-use types (free-grazing, grazing exclusion, mowing, winter grazing, and reclamation). Compared with free-grazing grasslands, C and N storage in the 0-50 cm layer increased by 18.3% (15.5 Mg C ha~(-1)) and 9.3% (0.8 Mg N ha~(-1)) after 10-yr of grazing exclusion, respectively, and 21.9% (18.5 Mg C ha~(-1)) and 11.5% (0.9 Mg N ha~(-1)) after 30-yr grazing exclusion, respectively. Similarly, soil C and N storage increased by 15.3% (12.9 Mg C ha~(-1)) and 10.2% (0.8 Mg N h~(a-1)) after 10-yr mowing, respectively, and 19.2% (16.2 Mg C ha~(-1)) and 7.1% (0.6 Mg N ha~(-1)) after 26-yr mowing, respectively. In contrast, soil C and N storage declined by 10.6% (9.0 Mg C ha~(-1)) and 11.4% (0.9 Mg N ha~(-1)) after 49-yr reclamation, respectively. Moreover, increases in C and N storage mainly occurred in sand and silt fractions in the 0-10 cm soil layer with grazing exclusion and mowing. Our findings provided evidence that Inner Mongolian grass- lands have the capacity to sequester C and N in soil with improved management practices, which were in the order: grazing exclusion > mowing > winter grazing > reclamation.
Document Type期刊论文
First Author Affilication中国科学院地理科学与资源研究所
Recommended Citation
GB/T 7714
He Nianpeng,Zhang Yunhai,Dai Jingzhong,et al. landuseimpactonsoilcarbonandnitrogensequestrationintypicalsteppeecosystemsinnermongolia[J]. journalofgeographicalsciences,2012,22(5):859.
APA He Nianpeng,Zhang Yunhai,Dai Jingzhong,Han Xingguo,Baoyin Taogetao,&Yu Guirui.(2012).landuseimpactonsoilcarbonandnitrogensequestrationintypicalsteppeecosystemsinnermongolia.journalofgeographicalsciences,22(5),859.
MLA He Nianpeng,et al."landuseimpactonsoilcarbonandnitrogensequestrationintypicalsteppeecosystemsinnermongolia".journalofgeographicalsciences 22.5(2012):859.
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