Symbiotic nitrogen fixation and interspecific transfer by Caragana microphylla in a temperate grassland with N-15 dilution technique
Ouyang, SN; Tian, YQ; Liu, QY; Zhang, L; Sun, Y; Xu, XL; Liu, YH
2016
Source PublicationAPPLIED SOIL ECOLOGY
ISSN0929-1393
Volume108Pages:221-227
AbstractQuantification of symbiotic nitrogen (N) fixation by legume and its N transfer to the neighboring plants is an important prerequisite to understand the N cycling in the N-limited grasslands. The objective of this study is to explore the symbiotic N-2-fixation by a legume shrub (Caragana microphylla) and its N transfer to coexisting non-legumes with the N-15 dilution technique. A paired experimental design (legume vs. non-legume quadrats) was used. A small amount (0.03 gN m(-2)) of N-15-labeled KNO3 (99.5% N-15 enrichment) was evenly distributed in these paired labeled quadrats, with only water additions as the control. One month after the N-15 addition, aboveground parts of C. microphylla and four non-legumes of reference plants (i.e. Cleistogenes squarrosa, Artemisia frigida, Artemisia capillaris and Leymus chinensis) in both labeled and controlled quadrats were harvested. Symbiotic N-2-fixation and transfer to non-legumes were estimated based on the aboveground biomass and its N-15 in these plant species. The N derived from the atmosphere (%Ndfa) of C microphylla was estimated to range from 84 to 95%. According to the aboveground biomass of C. microphylla, symbiotic N-2-fixation was estimated to be 4.3 gm(-2) yr(-1) in the mixed C. microphylla community in the temperate grassland of northern China. The amount of N transfer from C microphylla to their coexisting plants varied with plant species. About half of above N in C. squarrosa derived from C microphylla, while L. chinensis showed almost no N derived from C microphylla. Both A. frigida and A. capillaris showed about 36% and 37% of N derived from C microphylla, respectively. Totally, about 17% of N fixed in the aboveground part of C microphylla was transferred to its associated species. Considering the amount of N fixed and transferred by C microphylla, we conclude that C microphylla plays an important role in the N cycling of temperate grasslands in northern China. (C) 2016 Elsevier B.V. All rights reserved.
SubtypeJournal
KeywordCaragana microphylla Nitrogen fixation Nitrogen transfer Temperate grassland N-15 dilution technique
Subject AreaAgriculture
WOS Subject ExtendedSoil Science
WOS KeywordNATURAL-ABUNDANCE ; SUBTERRANEAN CLOVER ; FORAGE LEGUMES ; N-2 FIXATION ; SOIL ; PASTURE ; N-2-FIXATION ; LIMITATION ; COMMUNITY ; LUCERNE
Indexed BySCI
Language英语
WOS IDWOS:000386643800025
PublisherELSEVIER SCIENCE BV
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/44151
Collection生态系统网络观测与模拟院重点实验室_生态网络实验室
Recommended Citation
GB/T 7714
Ouyang, SN,Tian, YQ,Liu, QY,et al. Symbiotic nitrogen fixation and interspecific transfer by Caragana microphylla in a temperate grassland with N-15 dilution technique[J]. APPLIED SOIL ECOLOGY,2016,108:221-227.
APA Ouyang, SN.,Tian, YQ.,Liu, QY.,Zhang, L.,Sun, Y.,...&Liu, YH.(2016).Symbiotic nitrogen fixation and interspecific transfer by Caragana microphylla in a temperate grassland with N-15 dilution technique.APPLIED SOIL ECOLOGY,108,221-227.
MLA Ouyang, SN,et al."Symbiotic nitrogen fixation and interspecific transfer by Caragana microphylla in a temperate grassland with N-15 dilution technique".APPLIED SOIL ECOLOGY 108(2016):221-227.
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