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Nitrogen addition increases the production and turnover of the lower-order roots but not of the higher-order roots of Bothriochloa ischaemum
Wang, Guoliang; Xue, Sha; Liu, Fang; Liu, Guobin; Wang, GL (reprint author), Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi Provinc, Peoples R China.
SubtypeArticle
2017
Source PublicationPLANT AND SOIL
ISSN0032-079X
description.correspondentemailglwang@nwsuaf.edu.cn
Volume415Issue:1-2Pages:423-434
AbstractGlobal nitrogen deposition alters grassland ecosystems. Whether added nitrogen changes root production and turnover by root orders is unclear. We compared the root dynamics across four root orders of Bothriochloa ischaemum treated with nitrogen addition (0-10 g N m(-2) year(-1)). The higher order roots exhibited lower production, turnover, number, length, and biomass, indicating a hierarchical system of B. ischaemum. At whole root system level, nitrogen addition increased length production, biomass production and turnover. At root order level, nitrogen addition increased length production, biomass production, and turnover of the first two order roots but not of the third- and fourth-order roots. Nitrogen addition reduced root biomass, and the belowground to aboveground biomass ratio, supporting the functional equilibrium hypothesis. The increased root production, turnover and decreased root number, length and biomass were mainly attributed to the increasing ammonium and nitrate nitrogen. Nitrogen addition increased the length production (7-30%), biomass production (10-34%) and turnover (8-35%) of the first two order roots but not of the higher order roots compared with the control pots. The discrepancy in root characteristics and their responses to nitrogen availability among root orders should be considered in establishing root dynamic models.
KeywordGrass Nitrogen Deposition Production Root Dynamic Root Order Turnover
Subject AreaAgriculture ; Plant Sciences
DOI10.1007/s11104-016-3160-2
URL查看原文
Indexed BySCI
Publication PlaceDORDRECHT
Language英语
WOS IDWOS:000403495500031
PublisherSPRINGER
Funding OrganizationNational Natural Science Foundation of China [41471438, 41371508]; Key Technologies R D Program [2015BAC01B03]; Chinese Academy of Sciences [KFZD-SW-306-2] ; National Natural Science Foundation of China [41471438, 41371508]; Key Technologies R D Program [2015BAC01B03]; Chinese Academy of Sciences [KFZD-SW-306-2]
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Cited Times:13[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.iswc.ac.cn/handle/361005/7982
Collection水保所科研产出--SCI_2017--SCI
Corresponding AuthorWang, GL (reprint author), Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi Provinc, Peoples R China.
AffiliationNorthwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi Provinc, Peoples R China
Recommended Citation
GB/T 7714
Wang, Guoliang,Xue, Sha,Liu, Fang,et al. Nitrogen addition increases the production and turnover of the lower-order roots but not of the higher-order roots of Bothriochloa ischaemum[J]. PLANT AND SOIL,2017,415(1-2):423-434.
APA Wang, Guoliang,Xue, Sha,Liu, Fang,Liu, Guobin,&Wang, GL .(2017).Nitrogen addition increases the production and turnover of the lower-order roots but not of the higher-order roots of Bothriochloa ischaemum.PLANT AND SOIL,415(1-2),423-434.
MLA Wang, Guoliang,et al."Nitrogen addition increases the production and turnover of the lower-order roots but not of the higher-order roots of Bothriochloa ischaemum".PLANT AND SOIL 415.1-2(2017):423-434.
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