Effect of long-term grazing on soil organic carbon content in semiarid steppes in Inner Mongolia

	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
刊名	ecological research
	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
合作状况	其它
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.
学科主题	生物科学
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
公开日期	2009-12-09
内容类型	期刊论文
源URL	[http://ir.nwipb.ac.cn/handle/363003/1361]
专题	西北高原生物研究所_中国科学院西北高原生物研究所
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
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,2005,20(5):519-527.
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,20(5),519-527.
MLA	Cui, XY,et al."Effect of long-term grazing on soil organic carbon content in semiarid steppes in Inner Mongolia".ecological research 20.5(2005):519-527.