Effects of land-use patterns on soil carbon and nitrogen variations along revegetated hillslopes in the Chinese Loess Plateau

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	Effects of land-use patterns on soil carbon and nitrogen variations along revegetated hillslopes in the Chinese Loess Plateau
	Gao, Guangyao; Tuo, Dengfeng; Han, Xiaoyang; Jiao, Lei; Li, Junran; Fu, Bojie
刊名	SCIENCE OF THE TOTAL ENVIRONMENT
	2020-12-01
卷号	746 页码:1-10
关键词	Revegetation Land-use pattern Soil carbon and nitrogen Aboveground biomass Loess hillslope
ISSN号	0048-9697
英文摘要	In water-limited areas, revegetation of abandoned croplands may lead to extensive land-use changes and considerable variations on soil carbon (C) and nitrogen (N). However, the impact of land-use patterns (i.e., the spatial combinations of different land-use types) on soil C and N variations following revegetation remains unclear. In this study, we measured soil organic carbon (SOC), total carbon (TC), and total nitrogen (TN) stocks to a depth of 200 cm in grassland (GL), shrubland (SL), young forestland (YF), and mature forestland (MF) under four land-use patterns in a catchment located in the Chinese Loess Plateau. The highest SOC, TC and TN stocks occurred in MF and the lowest was found in GL. Compared to every single land-use type, soil C and N stocks significantly increased under different land-use patterns. The highest SOC stock (6.51 kg m(-2)) was found in the GL-YF-SL pattern, and the highest TC stock (47.25 kg m(-2)) and TN stock (0.70 kg m(-2)) were both observed in the MF-YF pattern. SOC stocks showed significantly positive correlations with TC and TN stocks under different land-use patterns (p < 0.05), except for the GL-MF. The soil C-N interactions were stronger in the MF-SL and GL-YF-SL patterns compared to the GL-MF and MF-SL. Redundancy analysis indicated that the SOC, TC, and TN variations were well explained by aboveground biomass and land-use patterns, with accumulated variance of 41.6% and 54.2% in Axis 1 and Axis 2, respectively. The differences of soil C and N accumulation among land-use patterns were mostly related to different vegetation coverage and the intensity of soil erosion. This study indicates that creating proper spatial distribution of land-use types on hillslopes could benefit soil C and N sequestrations and ecosystem restoration in semi-arid environments. (C) 2020 Elsevier B.V. All rights reserved.
内容类型	期刊论文
源URL	[http://ir.rcees.ac.cn/handle/311016/44291]
专题	生态环境研究中心_城市与区域生态国家重点实验室
推荐引用方式 GB/T 7714	Gao, Guangyao,Tuo, Dengfeng,Han, Xiaoyang,et al. Effects of land-use patterns on soil carbon and nitrogen variations along revegetated hillslopes in the Chinese Loess Plateau[J]. SCIENCE OF THE TOTAL ENVIRONMENT,2020,746:1-10.
APA	Gao, Guangyao,Tuo, Dengfeng,Han, Xiaoyang,Jiao, Lei,Li, Junran,&Fu, Bojie.(2020).Effects of land-use patterns on soil carbon and nitrogen variations along revegetated hillslopes in the Chinese Loess Plateau.SCIENCE OF THE TOTAL ENVIRONMENT,746,1-10.
MLA	Gao, Guangyao,et al."Effects of land-use patterns on soil carbon and nitrogen variations along revegetated hillslopes in the Chinese Loess Plateau".SCIENCE OF THE TOTAL ENVIRONMENT 746(2020):1-10.