Effects of long-term grazing exclusion on vegetation structure, soil water holding capacity, carbon and nitrogen sequestration capacity in an alpine meadow on the Tibetan Plateau

NWIPB OpenIR

	Effects of long-term grazing exclusion on vegetation structure, soil water holding capacity, carbon and nitrogen sequestration capacity in an alpine meadow on the Tibetan Plateau
	Yang, Yong-sheng; Zhang, Fa-wei; Xie, Xian-rong; Wang, Jun-bang; Li, Ying-nian; Huang, Xiao-tao; Li, Hui-ting; Zhou, Hua-kun
	2023
发表期刊	JOURNAL OF MOUNTAIN SCIENCE
卷号	20 期号:3 页码:779
摘要	Grazing exclusion is one of the primary management practices used to restore degraded grasslands on the Tibetan Plateau. However, to date, the effects of long-term grazing exclusion measures on the process of restoring degraded alpine meadows have not been evaluated. In this study, moderately degraded plots, in which the vegetation coverage was approximately 65% and the dominant plant species was Potentilla anserina L, with grazing exclusion for 2 to 23 years, were selected in alpine meadows of Haibei in Qinghai-Tibet Plateau. Plant coverage, plant height, biomass, soil bulk density, saturated water content, soil organic carbon (SOC) and total nitrogen (TN) were evaluated. The results were as follows: (1) With increased grazing exclusion duration, aboveground biomass and total saturated water content at 0-40 cm depth, the average SOC and TN contents in moderately degraded alpine meadows increased as a power function, and the plant height increased as a log function. (2) The average soil bulk density at 0-40 cm depth first decreased and then increased with increasing grazing exclusion duration, and the minimum value of 0.90 g center dot cm(-3) was reached at 15.23 years. The plant coverage, total belowground biomass at 0-40 cm depth, total aboveground and belowground biomass first increased and then decreased, their maximum values (80.49%, 2452.92 g center dot m(-2), 2891.06 g center dot m(-2)) were reached at 9.41, 9.46 and 10.25 years, respectively. Long-term grazing exclusion is apparently harmful for the sustainable restoration of degraded alpine meadows. The optimal duration of grazing exclusion for the restoration of moderately degraded alpine meadows was 10 years. This research suggests that moderate disturbance should be allowed in moderately degraded alpine meadows after 10 years of grazing exclusion.
收录类别	SCIE
文献类型	期刊论文
条目标识符	http://210.75.249.4/handle/363003/61681
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	Yang, Yong-sheng,Zhang, Fa-wei,Xie, Xian-rong,et al. Effects of long-term grazing exclusion on vegetation structure, soil water holding capacity, carbon and nitrogen sequestration capacity in an alpine meadow on the Tibetan Plateau[J]. JOURNAL OF MOUNTAIN SCIENCE,2023,20(3):779.
APA	Yang, Yong-sheng.,Zhang, Fa-wei.,Xie, Xian-rong.,Wang, Jun-bang.,Li, Ying-nian.,...&Zhou, Hua-kun.(2023).Effects of long-term grazing exclusion on vegetation structure, soil water holding capacity, carbon and nitrogen sequestration capacity in an alpine meadow on the Tibetan Plateau.JOURNAL OF MOUNTAIN SCIENCE,20(3),779.
MLA	Yang, Yong-sheng,et al."Effects of long-term grazing exclusion on vegetation structure, soil water holding capacity, carbon and nitrogen sequestration capacity in an alpine meadow on the Tibetan Plateau".JOURNAL OF MOUNTAIN SCIENCE 20.3(2023):779.