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Water use strategies for two dominant tree species in pure and mixed plantations of the semiarid Chinese Loess Plateau
Yakun Tang1; Xu Wu2,3; Yunming Chen1; Jie Wen1; Yuli Xie1; Senbao Lu1; Chen, YM (reprint author), Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China.
SubtypeArticle
2018
Source PublicationECOHYDROLOGY
ISSN1936-0584
description.correspondentemailymchen@ms.iswc.ac.cn
Volume11Issue:4
AbstractUnderstanding the water sources and physiological responses to soil moisture pulses for plantation species, particularly in mixed plantations, are essential to assess the water use strategy and vegetation restoration in semiarid regions. We used hydrogen stable isotopes in plant and soil water to determine the potential water sources for Pinus tabuliformis and Hippophae rhamnoides in both pure and mixed plantations in the semiarid Chinese Loess Plateau during the vigorous growing season (June-August) in 2016. Stomatal conductance (g(c)), midday leaf water potential ((m)) and photosynthetic rate (P-r) were measured concurrently to analyse the physiological response. The P.tabuliformis in the pure plantation depended largely on shallow and middle soil layers regardless of precipitation amount, permitting this species to maintain stable (m) at the expense of P-r through stomatal control. In contrast, H.rhamnoides in the pure plantation shifted its water source from shallow to deep soil layers following decreases in precipitation, allowing this species to maintain stable g(c) and P-r at the expense of (m). Thus, P.tabuliformis and H.rhamnoides displayed isohydric and anisohydric behaviour, respectively. Additionally, both species in mixed plantations largely absorbed water from shallow soil layers and shifted to deep soil layers when precipitation decreased. Mixed afforestation significantly reduced (p<.05) P-r for P.tabuliformis and (m) for H.rhamnoides. Although contrasting physiological responses were adopted by these species, the major proportion of water resources were competitively obtained from similar soil depthsindicating that their mixed afforestation requires further investigation.
KeywordHydrogen Stable Isotope Physiological Response Soil Moisture Pulse Water Use Strategy
Subject AreaEnvironmental Sciences & Ecology ; Water Resources
DOI10.1002/eco.1943
Indexed BySCI
Publication Place111 RIVER ST, HOBOKEN 07030-5774, NJ USA
Language英语
WOS IDWOS:000434219200008
PublisherWILEY
Funding OrganizationNational Natural Science Foundation of China [41501576] ; National Natural Science Foundation of China [41501576] ; China Special Fund for Meteorological Research in the Public Interest [GYHY201506001-3] ; China Special Fund for Meteorological Research in the Public Interest [GYHY201506001-3]
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Document Type期刊论文
Identifierhttp://ir.iswc.ac.cn/handle/361005/8238
Collection水保所科研产出--SCI_2018--SCI
Corresponding AuthorChen, YM (reprint author), Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China.
Affiliation1.Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China
2.Chinese Acad Sci, State Key Lab Soil Eros & Dryland Farming Loess P, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China
3.Minist Water Resources, Yangling 712100, Shaanxi, Peoples R China
4.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Yakun Tang,Xu Wu,Yunming Chen,et al. Water use strategies for two dominant tree species in pure and mixed plantations of the semiarid Chinese Loess Plateau[J]. ECOHYDROLOGY,2018,11(4).
APA Yakun Tang.,Xu Wu.,Yunming Chen.,Jie Wen.,Yuli Xie.,...&Chen, YM .(2018).Water use strategies for two dominant tree species in pure and mixed plantations of the semiarid Chinese Loess Plateau.ECOHYDROLOGY,11(4).
MLA Yakun Tang,et al."Water use strategies for two dominant tree species in pure and mixed plantations of the semiarid Chinese Loess Plateau".ECOHYDROLOGY 11.4(2018).
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