Knowledge Management System of Northwest Institute of Plateau Biology, CAS
Effect of long-term grazing on soil organic carbon content in semiarid steppes in Inner Mongolia | |
Cui, XY ; Wang, YF ; Niu, HS ; Wu, J ; Wang, SP ; Schnug, E ; Rogasik, J ; Fleckenstein, J ; Tang, YH | |
2005-09-01 | |
发表期刊 | ECOLOGICAL RESEARCH
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摘要 | To clarify the response of soil organic carbon (SOC) content to season-long grazing in the semiarid typical steppes of Inner Mongolia, we examined the aboveground biomass and SOC in both grazing (G-site) and no grazing (NG-site) sites in two typical steppes dominated by Leymus chinensis and Stipa grandis, as well as one seriously degraded L. chinensis grassland dominated by Artemisia frigida. The NG-sites had been fenced for 20 years in L. chinensis and S. grandis grasslands and for 10 years in A. frigida grassland. Above-ground biomass at G-sites was 21-35% of that at NG-sites in L. chinensis and S. grandis grasslands. The SOC, however, showed no significant difference between G-site and NG-site in both grasslands. In the NG-sites, aboveground biomass was significantly lower in A. frigida grassland than in the other two grasslands. The SOC in A. frigida grassland was about 70% of that in L. chinensis grassland. In A. frigida grassland, aboveground biomass in the G-site was 68-82% of that in the NG-site, whereas SOC was significantly lower in the G-site than in the NG-site. Grazing elevated the surface soil pH in L. chinensis and A. frigida communities. A spatial heterogeneity in SOC and pH in the topsoil was not detected the G-site within the minimal sampling distance of 10 m. The results suggested that compensatory growth may account for the relative stability of SOC in G-sites in typical steppes. The SOC was sensitive to heavy grazing and difficult to recover after a significant decline caused by overgrazing in semiarid steppes.; To clarify the response of soil organic carbon (SOC) content to season-long grazing in the semiarid typical steppes of Inner Mongolia, we examined the aboveground biomass and SOC in both grazing (G-site) and no grazing (NG-site) sites in two typical steppes dominated by Leymus chinensis and Stipa grandis, as well as one seriously degraded L. chinensis grassland dominated by Artemisia frigida. The NG-sites had been fenced for 20 years in L. chinensis and S. grandis grasslands and for 10 years in A. frigida grassland. Above-ground biomass at G-sites was 21-35% of that at NG-sites in L. chinensis and S. grandis grasslands. The SOC, however, showed no significant difference between G-site and NG-site in both grasslands. In the NG-sites, aboveground biomass was significantly lower in A. frigida grassland than in the other two grasslands. The SOC in A. frigida grassland was about 70% of that in L. chinensis grassland. In A. frigida grassland, aboveground biomass in the G-site was 68-82% of that in the NG-site, whereas SOC was significantly lower in the G-site than in the NG-site. Grazing elevated the surface soil pH in L. chinensis and A. frigida communities. A spatial heterogeneity in SOC and pH in the topsoil was not detected the G-site within the minimal sampling distance of 10 m. The results suggested that compensatory growth may account for the relative stability of SOC in G-sites in typical steppes. The SOC was sensitive to heavy grazing and difficult to recover after a significant decline caused by overgrazing in semiarid steppes. |
文献类型 | 期刊论文 |
条目标识符 | http://210.75.249.4/handle/363003/55916 |
专题 | 中国科学院西北高原生物研究所 |
推荐引用方式 GB/T 7714 | Cui, XY,Wang, YF,Niu, HS,et al. Effect of long-term grazing on soil organic carbon content in semiarid steppes in Inner Mongolia[J]. ECOLOGICAL RESEARCH, Cui Xiaoyong, Wang Yanfen, Niu Haishan, Wu Jing, Wang Shiping, Schnug Ewald, Rogasik Jutta, Fleckenstein Jurgen, Tang Yanhong.Effect of long-term grazing on soil organic carbon content in semiarid steppes in Inner Mongolia.ECOLOGICAL RESEARCH,2005,20(5): 519-527,2005. |
APA | Cui, XY.,Wang, YF.,Niu, HS.,Wu, J.,Wang, SP.,...&Tang, YH.(2005).Effect of long-term grazing on soil organic carbon content in semiarid steppes in Inner Mongolia.ECOLOGICAL RESEARCH. |
MLA | Cui, XY,et al."Effect of long-term grazing on soil organic carbon content in semiarid steppes in Inner Mongolia".ECOLOGICAL RESEARCH (2005). |
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