Response of water use efficiency and plant-soil C:N:P stoichiometry to stand quality in Robinia pseudoacacia on the Loess Plateau of China

doi:10.1016/j.catena.2021.105571

	Response of water use efficiency and plant-soil C:N:P stoichiometry to stand quality in Robinia pseudoacacia on the Loess Plateau of China
	Su, Bingqian 1,2; Shangguan, Zhouping 1,3
刊名	CATENA
	2021-11-01
卷号	206 页码:10
关键词	Afforestation Water use efficiency C:N:P stoichiometry Stand quality index Robinia pseudoacacia
ISSN号	0341-8162
DOI	10.1016/j.catena.2021.105571
通讯作者	Shangguan, Zhouping(shangguan@ms.iswc.ac.cn)
英文摘要	The evaluation of stand quality is of great significance for forest management and sustainable development. Water use efficiency (WUE) and the carbon (C), nitrogen (N), and phosphorus (P) stoichiometric characteristics of plants and soil are important indexes used to evaluate plant water and nutrients adaptation strategies. However, little is known about the effects of stand quality on WUE and plant soil C:N:P stoichiometry. In this study, the growth characteristics of Robinia pseudoacacia plantations and understory plants in an age series of 8-, 15-, 25-, and 35-year-old stands were investigated, and the leaf-level WUE and C:N:P stoichiometry in plants and soil were measured on the Loess Plateau. The results showed that the species richness, Shannon-Weiner diversity index, and evenness index reached their peaks in the 35-year-old stands with increasing afforestation age. WUE reached its highest value in the 35-year-old stands but was only significantly higher than that in the 8-year-old stands. Stand age had different effects on C, N, and P nutrients and stoichiometry in leaves, fine roots, and soil. The most obvious trend was that soil total P decreased significantly with increasing afforestation age, and the leaf N:P ratio was greater than 16 in the four stand ages, which indicated that P was the main limiting factor in R. pseudoacacia plantations. Leaf nutrients and stoichiometry are closely related to forest growth characteristics, while root nutrients and stoichiometry are more related to understory plant composition and diversity. Importantly, the WUE had no significant change with the increase in the stand quality index, and the response of soil stoichiometry to stand quality was stronger than that of plant stoichiometry. These results help us further understand coordinated plant-soil restoration after afforestation.
资助项目	Science and Technology Innovation Program of Shaanxi Academy of Forestry[SXLK2020-0101] ; National Natural Science Foundation of China[41771549] ; National Natural Science Foundation of China[42077452]
WOS关键词	BIOLOGICAL STOICHIOMETRY ; UNDERSTORY VEGETATION ; CARBON SEQUESTRATION ; MICROBIAL COMMUNITY ; ATMOSPHERIC CO2 ; FOREST GROWTH ; LEAF TRAITS ; TREE GROWTH ; FINE-ROOT ; ECOSYSTEM
WOS研究方向	Geology ; Agriculture ; Water Resources
语种	英语
出版者	ELSEVIER
WOS记录号	WOS:000688449100078
资助机构	Science and Technology Innovation Program of Shaanxi Academy of Forestry ; National Natural Science Foundation of China
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/165477]
专题	中国科学院地理科学与资源研究所
通讯作者	Shangguan, Zhouping
作者单位	1.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 3.Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Su, Bingqian,Shangguan, Zhouping. Response of water use efficiency and plant-soil C:N:P stoichiometry to stand quality in Robinia pseudoacacia on the Loess Plateau of China[J]. CATENA,2021,206:10.
APA	Su, Bingqian,&Shangguan, Zhouping.(2021).Response of water use efficiency and plant-soil C:N:P stoichiometry to stand quality in Robinia pseudoacacia on the Loess Plateau of China.CATENA,206,10.
MLA	Su, Bingqian,et al."Response of water use efficiency and plant-soil C:N:P stoichiometry to stand quality in Robinia pseudoacacia on the Loess Plateau of China".CATENA 206(2021):10.