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Extreme natural drought enhances interspecific facilitation in semiarid agroforestry systems
Gao, Xiaodong1,2,3; Liu, Zhipeng4; Zhao, Xining1,2,3; Ling, Qiang3; Huo, Gaopeng3; Wu, Pute1,2,3
2018-10-01
Source PublicationAGRICULTURE ECOSYSTEMS & ENVIRONMENT
ISSN0167-8809
Volume265Pages:444-453
Corresponding AuthorZhao, Xining(zxn@nwafu.edu.cn)
AbstractAgroforestry is a widely advocated adaptation strategy for enhancing agricultural resilience to extreme climates. However, it is somewhat controversial and there is limited evidence regarding its efficacy in semiarid regions. Here we describe studies on jujube agroforestry regimes using two different cash crops: the annual fodder species rape (Brassica napus) and the perennial daylily (Hemerocallis fulva). The jujube agroforestry systems were characterized with respect to their interspecific water interactions and their responses to extreme natural drought using stable isotopic techniques and in situ soil water observations in China's semiarid Loess Plateau region. We found that agroforestry altered the jujube trees' water sources but its impact depended on soil wetness: compared to monocultures, jujube trees in agroforestry systems generally shifted to deeper water under dry conditions but to shallower water under wet conditions. Complementary water use between jujube trees and crops was observed on most sampling dates, but there was clear evidence of water competition in the shallow layer under relatively wet conditions. Furthermore, a simple index, Relative Difference in Soil Water content (RDSW), was developed to indicate interspecific water interactions under various wetness conditions. It was found that facilitative interspecific interactions were clearly enhanced in both agroforestry systems during extreme drought. In addition, jujube yields in agroforestry systems were clearly higher than in monoculture. These findings demonstrate that agroforestry is a climate-smart agricultural system and can increase the resilience of semiarid jujube plantations to extreme real-world drought.
KeywordIntercropping Water use Soil water Stable isotopes Interaction Bayesian mixing model
DOI10.1016/j.agee.2018.07.001
WOS KeywordLOESS PLATEAU ; SOIL-WATER ; CLIMATE-CHANGE ; COCOA AGROFORESTRY ; PLANT-COMMUNITIES ; CHINA ; COMPETITION ; TREES ; MANAGEMENT ; MOISTURE
Indexed BySCI
Language英语
Funding ProjectNational Key R&D Program of China[2016YFC0400204] ; National Natural Science Foundation of China[41571506] ; National Natural Science Foundation of China[41771316] ; National Natural Science Foundation of China[51579212] ; Integrative Science Technology Innovation Engineering Project of Shaanxi[2016KTZDNY-01-03] ; Young-Talent Nurturing program of the Northwest AF University
Funding OrganizationNational Key R&D Program of China ; National Natural Science Foundation of China ; Integrative Science Technology Innovation Engineering Project of Shaanxi ; Young-Talent Nurturing program of the Northwest AF University
WOS Research AreaAgriculture ; Environmental Sciences & Ecology
WOS SubjectAgriculture, Multidisciplinary ; Ecology ; Environmental Sciences
WOS IDWOS:000443664900045
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/54313
Collection中国科学院地理科学与资源研究所
Corresponding AuthorZhao, Xining
Affiliation1.Northwest A&F Univ, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China
2.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, Yangling 712100, Shaanxi, Peoples R China
3.Nat Engn Res Ctr Water Saving & Irrigat Technol, Yangling 712100, Shaanxi, Peoples R China
4.Nanjing Agr Univ, Coll Resources & Environm Sci, Nanjing 210095, Jiangsu, Peoples R China
Recommended Citation
GB/T 7714
Gao, Xiaodong,Liu, Zhipeng,Zhao, Xining,et al. Extreme natural drought enhances interspecific facilitation in semiarid agroforestry systems[J]. AGRICULTURE ECOSYSTEMS & ENVIRONMENT,2018,265:444-453.
APA Gao, Xiaodong,Liu, Zhipeng,Zhao, Xining,Ling, Qiang,Huo, Gaopeng,&Wu, Pute.(2018).Extreme natural drought enhances interspecific facilitation in semiarid agroforestry systems.AGRICULTURE ECOSYSTEMS & ENVIRONMENT,265,444-453.
MLA Gao, Xiaodong,et al."Extreme natural drought enhances interspecific facilitation in semiarid agroforestry systems".AGRICULTURE ECOSYSTEMS & ENVIRONMENT 265(2018):444-453.
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