Variations in soil nutrient availability across Tibetan grassland from the 1980s to 2010s

doi:10.1016/j.geoderma.2018.12.009

CORC > 兰州理工大学 > 兰州理工大学 > 土木工程学院

	Variations in soil nutrient availability across Tibetan grassland from the 1980s to 2010s
	Tian, Liming 2,3,4; Zhao, Lin 2,3,5; Wu, Xiaodong 3; Hu, Guojie 3; Fang, Hongbing 6; Zhao, Yonghua 3; Sheng, Yu 7; Chen, Ji 7; Wu, Jichun 7; Li, Wangping 1
刊名	Geoderma
	2019-03-15
卷号	338 页码:197-205
关键词	Climate change Decision trees Ecosystems Nitrogen Permafrost Phosphorus Potassium Vegetation Alpine grasslands Available nutrients Available phosphorus Environmental factors Nutrient availability Permafrost degradation Soil available nutrients Tibetan Plateau
ISSN号	00167061
DOI	10.1016/j.geoderma.2018.12.009
英文摘要	Changes in soil nutrient availability attributed to climate change and associated permafrost degradation have been reported in several ecosystems. However, little is known about the changes of soil nutrient availability in alpine grassland ecosystems. Based on a comprehensive dataset and random forest models, we investigated soil available nutrients changes and their relationships with environmental factors for the top 10 cm soils across Tibetan grassland between the 1980s and 2010s. During this period, topsoil available nitrogen stocks increased significantly by 24%, while available phosphorus and potassium stocks decreased significantly by 3% and 23%, respectively. Topsoil nutrient availability dynamics varied substantially among vegetation types. Initial nutrient stocks explained the largest proportions of available nutrients changes, though climate, permafrost, vegetation, soil properties, and their interactions also had significant contributions. The increasing rate of active layer thickness was negatively related to soil available nitrogen dynamics but did not significantly change available phosphorus and potassium, indicating that the increase in the annual depth of surface thaw of the permafrost was associated with an increase in soil nitrogen availability but no significant changes in available phosphorus and potassium. These results suggest that the Tibetan alpine grassland ecosystems may shift from nitrogen-limited to phosphorus or potassium-limited in the future. © 2018 Elsevier B.V.
WOS研究方向	Agriculture
语种	英语
出版者	Elsevier B.V., Netherlands
WOS记录号	WOS:000457657000021
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/150207]
专题	土木工程学院
作者单位	1.School of Civil Engineering, Lanzhou University of Technology, Lanzhou; 730050, China; 2.School of Geographical Sciences, Nanjing University of Information Science & Technology, Nanjing; 210044, China; 3.Cryosphere Research Station on the Qinghai-Tibetan Plateau, State Key Laboratory of Cryospheric Sciences, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou; 730000, China; 4.Key Laboratory for Bio-resource and Eco-environment of Ministry of Education, College of Life Sciences, Sichuan University, Chengdu; 610064, China; 5.University of Chinese Academy of Sciences, Beijing; 100049, China; 6.School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou; 730070, China; 7.State Key Laboratory of Frozen Soil Engineering, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou; 730000, China; 8.Agricultural and Forestry Experiment Station, Palmer Research Center, University of Alaska Fairbanks, Palmer; AK; 99645, United States
推荐引用方式 GB/T 7714	Tian, Liming,Zhao, Lin,Wu, Xiaodong,et al. Variations in soil nutrient availability across Tibetan grassland from the 1980s to 2010s[J]. Geoderma,2019,338:197-205.
APA	Tian, Liming.,Zhao, Lin.,Wu, Xiaodong.,Hu, Guojie.,Fang, Hongbing.,...&Zhang, Xiumin.(2019).Variations in soil nutrient availability across Tibetan grassland from the 1980s to 2010s.Geoderma,338,197-205.
MLA	Tian, Liming,et al."Variations in soil nutrient availability across Tibetan grassland from the 1980s to 2010s".Geoderma 338(2019):197-205.