Changes of soil organic and inorganic carbon in relation to grassland   degradation in Northern Tibet

doi:10.1007/s11284-017-1447-2

CORC > 北京大学 > 城市与环境学院

	Changes of soil organic and inorganic carbon in relation to grassland degradation in Northern Tibet
	Liu, Shuli ; Tang, Yanhong ; Zhang, Fawei ; Du, Yangong ; Lin, Li ; Li, Yikang ; Guo, Xiaowei ; Li, Qian ; Cao, Guangmin
刊名	ECOLOGICAL RESEARCH
	2017
关键词	Soil carbon Grassland degradation Carbon storage Northern Tibet QINGHAI PROVINCE LAND DEGRADATION CLIMATE-CHANGE ALPINE MEADOW CO2 EMISSIONS CHINA STORAGE SEQUESTRATION PLATEAU MANAGEMENT
DOI	10.1007/s11284-017-1447-2
英文摘要	The effect of livestock grazing on grassland degradation and the resulting impact on soil carbon concentration is an important factor in carbon estimation. We addressed this issue using field observations and laboratory analysis of samples from Tibetan grassland. Based on the field measurements, we investigated the soil organic carbon (SOC) and soil inorganic carbon (SIC) under two contrasting degradation states: lightly or non-degraded grasslands (LDG) and heavily degraded grasslands (HDG). We assessed their relationships with environmental factors using data collected from 99 sites across Northern Tibet during 2011-2012. Data were analyzed using a linear mixed-effects model and one-way ANOVA. The results showed that: (1) SOC concentration decreased and SIC concentration increased following grassland degradation, especially at soil depths in the range of 0-10 cm (P < 0.05); (2) the major environmental factors affecting SOC and SIC were soil pH and plant biomass; (3) spatially, the SOC density increased with the mean annual temperature and mean annual precipitation, whereas SIC exhibited the opposite trend; (4) the SOC density increased at first and then decreased with increasing grazing intensity, with an opposite trend in SIC; and (5) soil carbon storage in this region was 0.14 Pg smaller in the HDG than in the LDG. This study suggests that grassland degradation can significantly affect the vertical distribution and storage of SOC and SIC. The carbon sequestration capacity of the top 100 cm of soil in Northern Tibet was estimated as 0.14 Pg.; National Natural Science Foundation of China [41030105]; "Strategic Priority Research Program-Climate Change: Carbon Budget, Related Issues" of the Chinese Academy of Sciences [XDA05050404]; Ministry of the Environment, Japan; SCI(E); ARTICLE; 3; 395-404; 32
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/473758]
专题	城市与环境学院
推荐引用方式 GB/T 7714	Liu, Shuli,Tang, Yanhong,Zhang, Fawei,et al. Changes of soil organic and inorganic carbon in relation to grassland degradation in Northern Tibet[J]. ECOLOGICAL RESEARCH,2017.
APA	Liu, Shuli.,Tang, Yanhong.,Zhang, Fawei.,Du, Yangong.,Lin, Li.,...&Cao, Guangmin.(2017).Changes of soil organic and inorganic carbon in relation to grassland degradation in Northern Tibet.ECOLOGICAL RESEARCH.
MLA	Liu, Shuli,et al."Changes of soil organic and inorganic carbon in relation to grassland degradation in Northern Tibet".ECOLOGICAL RESEARCH (2017).