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Nonlinear response of lucerne (Medicago sativa) biomass and biological nitrogen fixation to different irrigations and sowing modes
Yu, Mengmeng1,2; Tian, Yuqiang1,2; Gao, Qiong1,3; Xu, Xingliang4; Wen, Shuhai1,2; Fan, Zhenxu1,2; Li, Xiaobing2; Gong, Jirui2; Liu, Yinghui2
2018-04-01
Source PublicationAPPLIED SOIL ECOLOGY
ISSN0929-1393
Volume125Pages:257-263
Corresponding AuthorTian, Yuqiang(tyq@bnu.edu.cn) ; Xu, Xingliang(xuxl@igsnrr.ac.cn)
AbstractIt remains unclear how the biomass and biological nitrogen (N) fixation by lucerne (Medicago sativa) respond to different irrigations and sowing modes in arid and semi-arid regions. To clarify the question, a field N-15 isotope labeling experiment was conducted to evaluate the biological N fixation in pure and mixed lucerne (lucerne growing alone or lucerne growing with Elymus nutans (EN), Agropyron cristatum (AC) or Bromus inermis (BI)) under four water conditions: a control (CK) and three levels of irrigation (low (LI), medium (MI), and high (HI)) by the N-15 dilution technique. The biomass of lucerne in pure and mixed lucerne conditions responded nonlinearly to different irrigations, and in mixed lucerne, the biomass varied with the specific coexisting plant species, with the maximum in CK for lucerne-EN, in LI for lucerne-AC, and in HI for lucerne-BI. The N derived from the atmosphere (%Ndfa) in mixed lucerne (90.8%) was higher than that in pure lucerne (88.3%). Biological N fixation by lucerne in mixed lucerne ranged from 2.86 to 15.05 g Nm(-2), and that in pure lucerne was approximately 10.99 g Nm(-2). A positive relation was observed between the competitive response and N fixation by lucerne, which showed that interspecific competition or facilitation in mixed lucerne altered N fixation by lucerne. These findings indicate that an appropriate legume-grass mixture with moderate irrigation can promote the biomass of forages and biological N fixation by legumes and further improve soil quality in artificial grasslands.
KeywordLucerne (Medicago sativa) Biological nitrogen fixation Irrigation Sowing modes N-15 isotope dilution method
DOI10.1016/j.apsoil.2018.02.003
WOS KeywordWHITE CLOVER ; POSITIVE INTERACTIONS ; PERENNIAL RYEGRASS ; SMOOTH BROMEGRASS ; ISOTOPE-DILUTION ; FORAGE LEGUMES ; SOIL N ; ALFALFA ; WATER ; MANAGEMENT
Indexed BySCI
Language英语
Funding ProjectNational Key Research and Development Program of China[2016YFC0500502] ; National Natural Science Foundation of China[41771325] ; National Natural Science Foundation of China[41730639] ; National Natural Science Foundation of China[31470560] ; National Key Basic Research Program of China[2014CB138803] ; State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University[2017-FX-02]
Funding OrganizationNational Key Research and Development Program of China ; National Natural Science Foundation of China ; National Key Basic Research Program of China ; State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University
WOS Research AreaAgriculture
WOS SubjectSoil Science
WOS IDWOS:000430170700029
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/57371
Collection中国科学院地理科学与资源研究所
Corresponding AuthorTian, Yuqiang; Xu, Xingliang
Affiliation1.Beijing Normal Univ, State Key Lab Earth Surface Proc & Resource Ecol, CHESS, Beijing 100875, Peoples R China
2.Beijing Normal Univ, Fac Geog Sci, Sch Nat Resources, Beijing 100875, Peoples R China
3.Univ Puerto Rico, Dept Environm Sci, San Juan, PR 00936 USA
4.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China
Recommended Citation
GB/T 7714
Yu, Mengmeng,Tian, Yuqiang,Gao, Qiong,et al. Nonlinear response of lucerne (Medicago sativa) biomass and biological nitrogen fixation to different irrigations and sowing modes[J]. APPLIED SOIL ECOLOGY,2018,125:257-263.
APA Yu, Mengmeng.,Tian, Yuqiang.,Gao, Qiong.,Xu, Xingliang.,Wen, Shuhai.,...&Liu, Yinghui.(2018).Nonlinear response of lucerne (Medicago sativa) biomass and biological nitrogen fixation to different irrigations and sowing modes.APPLIED SOIL ECOLOGY,125,257-263.
MLA Yu, Mengmeng,et al."Nonlinear response of lucerne (Medicago sativa) biomass and biological nitrogen fixation to different irrigations and sowing modes".APPLIED SOIL ECOLOGY 125(2018):257-263.
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