Nitrogen addition increases the production and turnover of the lower-order roots but not of the higher-order roots of Bothriochloa ischaemum

doi:10.1007/s11104-016-3160-2

ISWC OpenIR > 水保所科研产出--SCI > 2017--SCI

	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.
文章类型	Article
	2017
发表期刊	PLANT AND SOIL
ISSN	0032-079X
通讯作者邮箱	glwang@nwsuaf.edu.cn
卷号	415 期号:1-2 页码:423-434
摘要	Global 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.
关键词	Grass Nitrogen Deposition Production Root Dynamic Root Order Turnover
学科领域	Agriculture ; Plant Sciences
DOI	10.1007/s11104-016-3160-2
URL	查看原文
收录类别	SCI
出版地	DORDRECHT
语种	英语
WOS记录号	WOS:000403495500031
出版者	SPRINGER
项目资助者	National 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]
引用统计
文献类型	期刊论文
条目标识符	sbir.nwafu.edu.cn/handle/361005/7982
专题	水保所科研产出--SCI_2017--SCI
通讯作者	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.
作者单位	Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi Provinc, Peoples R China
推荐引用方式 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.