干旱区生态环境知识资源中心(Arid): Effects of rainfall manipulation and nitrogen addition on plant biomass allocation in a semiarid sandy grassland

Arid

DOI	10.1038/s41598-020-65922-0
	Effects of rainfall manipulation and nitrogen addition on plant biomass allocation in a semiarid sandy grassland
	Zhang, Jing 1; Zuo, Xiaoan 1; Zhao, Xueyong1 ; Ma, Jianxia 1; Medina-Roldan, Eduardo 2
通讯作者	Zuo, Xiaoan
来源期刊	SCIENTIFIC REPORTS
ISSN	2045-2322
出版年	2020
卷号	10 期号:1
英文摘要	Extreme climate events and nitrogen (N) deposition are increasingly affecting the structure and function of terrestrial ecosystems. However, the response of plant biomass to variations to these global change drivers is still unclear in semi-arid regions, especially in degraded sandy grasslands. In this study, a manipulative field experiment run over two years (from 2017 to 2018) was conducted to examine the effect of rainfall alteration and nitrogen addition on biomass allocation of annuals and perennial plants in Horqin sandy grassland, Northern China. Our experiment simulated extreme rainfall and extreme drought (a 60% reduction or increment in the growing season rainfall with respect to a control background) and N addition (20 g/m2) during the growing seasons. We found that the sufficient rainfall during late July and August compensates for biomass losses caused by insufficient water in May and June. When rainfall distribution is relatively uniform during the growing season, extreme rainfall increased aboveground biomass (AGB) and belowground biomass (BGB) of annuals, while extreme drought reduced AGB and BGB of perennials. Rainfall alteration had no significant impacts on the root-shoot ratio (R/S) of sandy grassland plants, while N addition reduced R/S of grassland species when there was sufficient rainfall in the early growing season. The biomass of annuals was more sensitive to rainfall alteration and nitrogen addition than the biomass of perennials. Our findings emphasize the importance of monthly rainfall distribution patterns during the growing season, which not only directly affect the growth and development of grassland plants, but also affect the nitrogen availability of grassland plants.
类型	Article
语种	英语
国家	Peoples R China
开放获取类型	Green Published, gold
收录类别	SCI-E
WOS记录号	WOS:000543961800003
WOS关键词	SPECIES-DIVERSITY ; LOESS PLATEAU ; PRECIPITATION ; WATER ; PRODUCTIVITY ; PATTERNS ; LEAF ; COMMUNITIES ; DEPOSITION ; NUTRIENTS
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/319793
作者单位	1.Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, Lanzhou 730000, Peoples R China; 2.Xian Jiaotong Liverpool Univ, Hlth & Environm Sci Dept, Suzhou 215123, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Jing,Zuo, Xiaoan,Zhao, Xueyong,et al. Effects of rainfall manipulation and nitrogen addition on plant biomass allocation in a semiarid sandy grassland[J],2020,10(1).
APA	Zhang, Jing,Zuo, Xiaoan,Zhao, Xueyong,Ma, Jianxia,&Medina-Roldan, Eduardo.(2020).Effects of rainfall manipulation and nitrogen addition on plant biomass allocation in a semiarid sandy grassland.SCIENTIFIC REPORTS,10(1).
MLA	Zhang, Jing,et al."Effects of rainfall manipulation and nitrogen addition on plant biomass allocation in a semiarid sandy grassland".SCIENTIFIC REPORTS 10.1(2020).