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题名: Effect of long-term grazing on soil organic carbon content in semiarid steppes in Inner Mongolia
作者: Cui, XY; Wang, YF; Niu, HS; Wu, J; Wang, SP; Schnug, E; Rogasik, J; Fleckenstein, J; Tang, YH
刊名: ECOLOGICAL RESEARCH
出版日期: 2005-09-01
卷号: 20, 期号:5, 页码:519-527
关键词: aboveground biomass ; light grazing ; carbon storage ; grasslands ; compensatory growth
学科分类: 生物科学
文章类型: Article
中文摘要: 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.
英文摘要: 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.
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
类目[WOS]: Ecology
研究领域[WOS]: Environmental Sciences & Ecology
关键词[WOS]: XILIN RIVER-BASIN ; TEMPERATE GRASSLAND ; SHORTGRASS STEPPE ; TALLGRASS PRAIRIE ; SONGNEN PLAIN ; ROOT BIOMASS ; MIXED-GRASS ; RESPONSES ; ECOSYSTEM ; NITROGEN
收录类别: SCI
语种: 英语
WOS记录号: WOS:000231804600002
Citation statistics:
内容类型: 期刊论文
URI标识: http://210.75.249.4/handle/363003/1361
Appears in Collections:中国科学院西北高原生物研究所_期刊论文

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作者单位: 1.Chinese Acad Sci, Grad Sch, Beijing 100039, Peoples R China
2.CAS, NW Inst Plateau Biol, Xining 810008, Peoples R China
3.Chinese Acad Sci, Inst Bot, Beijing 100044, Peoples R China
4.Fed Agr Res Ctr, Inst Plant Nutr & Soil Sci, D-38116 Braunschweig, Germany
5.Natl Inst Environm Studies, Tsukuba, Ibaraki 3058506, Japan

Recommended Citation:
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
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