干旱区生态环境知识资源中心(Arid): Shrub encroachment increases soil carbon and nitrogen stocks in temperate grasslands in China

Arid

DOI	10.1002/ldr.3259
	Shrub encroachment increases soil carbon and nitrogen stocks in temperate grasslands in China
	Li, He 1,4; Shen, Haihua 1,5; Zhou, Luhong 1; Zhu, Yankun 1,5; Chen, Leiyi 1; Hu, Huifeng 1; Zhang, Pujin 1; Fang, Jingyun 1,2,3
通讯作者	Shen, Haihua ; Fang, Jingyun
来源期刊	LAND DEGRADATION & DEVELOPMENT
ISSN	1085-3278
EISSN	1099-145X
出版年	2019
卷号	30 期号:7 页码:756-767
英文摘要	Shrub encroachment has significant impacts on carbon (C) and nitrogen (N) dynamics of grassland ecosystems, but, how it influences soil organic C (SOC) and soil total N (STN) stocks of grasslands is not well documented, especially in deep soils. Here, we examined these effects by investigating the SOC density (SOCD) and the STN density (STND) at depths of up to 5m in shrub patches and grassy matrix at 18 grassland sites in Inner Mongolia, China. Our results revealed that 44.0-54.1% of SOC and 65.5-74.8% of STN were stored in soil layers of 100cm to 500cm, and that shrub encroachment resulted in a significant accumulation of SOC and STN in shrub patches. The mean SOCD at 0-500cm soil layers in shrub patches and grassy matrix was 11.34 and 8.39kgCm(-2), respectively, and the mean STND was 2.45 and 2.13kgNm(-2), respectively. These differences between the shrub patches and grassy matrix were equivalent to an increase in the mean SOC and STN stocks of 2.95kgCm(-2) and 0.32kgNm(-2), respectively. Increases in SOCD and STND mainly occurred in 30-300cm soil layers, and varied between typical grassland and desert grassland. The changes in SOCD and STND exhibited significant negative correlations with temperature and pH and positive correlations with precipitation and plant biomass. Our findings suggest that shrub encroachment can significantly accumulate SOC and STN in deep soils in temperate grasslands, which helps to understand soil C and N dynamics in shrub-encroached grasslands.
英文关键词	deep soils land cover change shrub encroachment soil organic carbon soil total nitrogen
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000465039700004
WOS关键词	WOODY PLANT ENCROACHMENT ; INNER MONGOLIAN GRASSLANDS ; LAND-USE CHANGE ; ORGANIC-CARBON ; TEMPORAL DYNAMICS ; BULK-DENSITY ; ECOSYSTEM ; DEEP ; CLIMATE ; IMPACTS
WOS类目	Environmental Sciences ; Soil Science
WOS研究方向	Environmental Sciences & Ecology ; Agriculture
来源机构	北京大学 ; 中国科学院植物研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/217458
作者单位	1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China; 2.Peking Univ, Dept Ecol, Coll Urban & Environm, Minist Educ, Beijing 100871, Peoples R China; 3.Peking Univ, Minist Educ, Key Lab Earth Surface Proc, Beijing 100871, Peoples R China; 4.Jiangsu Normal Univ, Sch Geog Geomat & Planning, Xuzhou 221116, Jiangsu, Peoples R China; 5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Li, He,Shen, Haihua,Zhou, Luhong,et al. Shrub encroachment increases soil carbon and nitrogen stocks in temperate grasslands in China[J]. 北京大学, 中国科学院植物研究所,2019,30(7):756-767.
APA	Li, He.,Shen, Haihua.,Zhou, Luhong.,Zhu, Yankun.,Chen, Leiyi.,...&Fang, Jingyun.(2019).Shrub encroachment increases soil carbon and nitrogen stocks in temperate grasslands in China.LAND DEGRADATION & DEVELOPMENT,30(7),756-767.
MLA	Li, He,et al."Shrub encroachment increases soil carbon and nitrogen stocks in temperate grasslands in China".LAND DEGRADATION & DEVELOPMENT 30.7(2019):756-767.