干旱区生态环境知识资源中心(Arid): Effects of Slope Aspect and Rainfall on Belowground Deep Fine Root Traits and Aboveground Tree Height

Arid

DOI	10.3389/fpls.2021.684468
	Effects of Slope Aspect and Rainfall on Belowground Deep Fine Root Traits and Aboveground Tree Height
	Ma Lihui; Liu Xiaoli; Chai Jie; Wang Youke; Yang Jingui
通讯作者	Liu, XL (corresponding author), Northwest A&F Univ, Coll Water Resources & Architectural Engn, Yangling, Shaanxi, Peoples R China.
来源期刊	FRONTIERS IN PLANT SCIENCE
ISSN	1664-462X
出版年	2021
卷号	12
英文摘要	The vertical root distribution and rooting depth are the main belowground plant functional traits used to indicate drought resistance in arid and semiarid regions. The effects of the slope aspect on the aboveground traits are visible but not the belowground deep root traits. We aimed to investigate the fine root traits of the locust tree (Robinia pseudoacacia L.) planted on southerly and northerly aspects, and the variations in the rooting depth in regions with different rainfall, as well as assessing how deep rooting, might affect the response to drought in a loess region. We selected three study sites with different rainfall amounts, with six sampling plots at each site (three each with southerly and northerly aspects). Soil core samples were collected down to the depth where no roots were present. The locust trees tended to develop deeper fine roots rather than greater heights. The tree height and diameter were greater for locust trees on northerly aspects, whereas trees on southerly aspects had significantly deeper rooting depths. Fine root traits (root length, root area, and root dry weight density) were higher in the southerly aspect for both Changwu and Ansai, but lower in Suide. The ratio of the root front depth tree height ranged from 1.04 to 3.17, which was higher on southerly than northerly aspects, and it increased as the rainfall decreased. Locust tree growth traits (belowground fine root and aboveground tree height) were positively correlated with the mean annual rainfall. The soil moisture content of the topsoil decreased as the rainfall decreased, but the pattern varied in the deep layer. Our results suggest that the variations in the belowground rooting depth under different slope aspects may be related to plant survival strategies. The vertical extension of the rooting depth and tree height may be key functional traits that determine plant growth in drought-prone regions.
英文关键词	fine root functional trait root distribution slope aspect vertical tree extension
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000715837100001
WOS关键词	VERTICAL-DISTRIBUTION ; LOESS PLATEAU ; SPATIAL-DISTRIBUTION ; EVOLUTION-CANYON ; SOIL-MOISTURE ; STAND AGE ; WATER ; PHENOLOGY ; DYNAMICS ; FORESTS
WOS类目	Plant Sciences
WOS研究方向	Plant Sciences
来源机构	西北农林科技大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/368277
作者单位	[Ma Lihui; Wang Youke] Northwest A&F Univ, Inst Water Saving Agr Arid Areas China, Yangling, Shaanxi, Peoples R China; [Ma Lihui; Wang Youke] Northwest A&F Univ, Inst Soil & Water Conservat, Yangling, Shaanxi, Peoples R China; [Liu Xiaoli; Yang Jingui] Northwest A&F Univ, Coll Water Resources & Architectural Engn, Yangling, Shaanxi, Peoples R China; [Chai Jie] Northwest A&F Univ, Language Culture Coll, Yangling, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Ma Lihui,Liu Xiaoli,Chai Jie,et al. Effects of Slope Aspect and Rainfall on Belowground Deep Fine Root Traits and Aboveground Tree Height[J]. 西北农林科技大学,2021,12.
APA	Ma Lihui,Liu Xiaoli,Chai Jie,Wang Youke,&Yang Jingui.(2021).Effects of Slope Aspect and Rainfall on Belowground Deep Fine Root Traits and Aboveground Tree Height.FRONTIERS IN PLANT SCIENCE,12.
MLA	Ma Lihui,et al."Effects of Slope Aspect and Rainfall on Belowground Deep Fine Root Traits and Aboveground Tree Height".FRONTIERS IN PLANT SCIENCE 12(2021).