Leaf nitrogen acquisition of Leymus chinensis varies with leaf age and land use change in a semiarid grassland

doi:10.1016/j.envexpbot.2020.104051

	Leaf nitrogen acquisition of Leymus chinensis varies with leaf age and land use change in a semiarid grassland
	Tang, Bo 1; Man, Jing 1; Bai, Yongfei2
	2020
发表期刊	ENVIRONMENTAL AND EXPERIMENTAL BOTANY
ISSN	0098-8472
卷号	175
摘要	Nitrogen (N) is a determinant nutrient for plant growth, but how patterns of leaf N acquisition vary with leaf age and land use changes remain unclear. We quantified the contributions of soil ammonium (NH4+), nitrate (NO3-), and dissolved organic N (DON) to age-specific leaf N nutrient of a dominant species, Leymus chinensis, under changing land use (i.e., grazing, mowing, and grazing exclusion) in a semiarid grassland. Along the leaf age gradient, soil NO3- and DON contributed more to leaf N in younger than older leaves, while the opposite was observed for soil NH4+. Under changing land use, the relative contribution of DON was higher than inorganic N in grazing sites, while the opposite was true for mowing sites. Moreover, relative contributions of NO3- and DON increased along the restoration chronosequences of L. chinensis communities, while the opposite pattern was observed for NH4+. Variation in the relative contributions of NH4+, NO3-, and DON with land use changes was driven by soil pH, NO3- to NH4+ ratio, DON concentration and arbuscular mycorrhizae colonization, respectively. These results demonstrate that age-specific leaf N acquisition is associated with the adaptive strategies of plants. Due to differences in the biotic and abiotic factors that drive plant N acquisition, tradeoffs in N utilization of L. chinensis occur between NH4+, NO3-, and DON under land use changes in semiarid grasslands.
关键词	Leaf N acquisition Leaf age Contributions of soil ammonium, nitrate and dissolved organic N Changes in land use
学科领域	Plant Sciences ; Environmental Sciences
DOI	10.1016/j.envexpbot.2020.104051
收录类别	SCI
语种	英语
WOS关键词	ARBUSCULAR MYCORRHIZAL FUNGI ; TERM GRAZING EXCLUSION ; INNER-MONGOLIA ; ORGANIC NITROGEN ; PHOTOSYNTHETIC CAPACITY ; INORGANIC NITROGEN ; ROOT RESPIRATION ; STABLE-ISOTOPES ; SOIL CARBON ; NET FLUXES
WOS研究方向	Plant Sciences ; Environmental Sciences & Ecology
WOS记录号	WOS:000538133100011
出版者	PERGAMON-ELSEVIER SCIENCE LTD
文献子类	Article
出版地	OXFORD
EISSN	1873-7307
资助机构	National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31630010, 31320103916]
作者邮箱	yfbai@ibcas.ac.cn
引用统计	被引频次：4[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.ibcas.ac.cn/handle/2S10CLM1/21730
专题	植被与环境变化国家重点实验室
作者单位	1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, 20 Nanxincun, Beijing 100093, Peoples R China 2.Univ Chinese Acad Sci, Coll Life Sci, 19A Yuquan Rd, Beijing 100049, Peoples R China 3.Univ Chinese Acad Sci, Coll Resources & Environm, 19A Yuquan Rd, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Tang, Bo,Man, Jing,Bai, Yongfei. Leaf nitrogen acquisition of Leymus chinensis varies with leaf age and land use change in a semiarid grassland[J]. ENVIRONMENTAL AND EXPERIMENTAL BOTANY,2020,175.
APA	Tang, Bo,Man, Jing,&Bai, Yongfei.(2020).Leaf nitrogen acquisition of Leymus chinensis varies with leaf age and land use change in a semiarid grassland.ENVIRONMENTAL AND EXPERIMENTAL BOTANY,175.
MLA	Tang, Bo,et al."Leaf nitrogen acquisition of Leymus chinensis varies with leaf age and land use change in a semiarid grassland".ENVIRONMENTAL AND EXPERIMENTAL BOTANY 175(2020).

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