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Effects of clipping and shading on (NO3-)-N-15 and (NH4+)-N-15 recovery by plants in grazed and ungrazed temperate grasslands
Pang, Rui1,2; Sun, Yue1,3; Xu, Xingliang1; Song, Minghua1; Ouyang, Hua1
2018-12-01
Source PublicationPLANT AND SOIL
ISSN0032-079X
Volume433Issue:1-2Pages:339-352
Corresponding AuthorXu, Xingliang(xuxl@igsnrr.ac.cn) ; Ouyang, Hua(ohua@igsnrr.ac.cn)
AbstractAims In natural ecosystems, plants generally promote the acquisition of nitrogen (N) through the input of carbon (C) into the soil. The present study aimed to clarify how changes in C input affect N uptake by plants. Methods In situ N-15 labeling (((NH4)-N-15)(2)SO4 and (KNO3)-N-15) was performed in grazed and ungrazed Leymus chinensis grasslands located in Inner Mongolia, northern China. Clipping and shading treatments were used to reduce C allocation to roots by limiting photosynthesis because grazing can produce such similar effect through defoliation. Results Grazing increased the allocation of photosynthate to roots and the relative biomass of Carex duriuscula but decreased the relative biomass of L. chinensis. Grazing decreased N-15-NH4+ recovery (grazed: 30.9% vs. ungrazed: 39.3%) but increased N-15-NO3- recovery (grazed: 26.9% vs. ungrazed: 17.6%), which may be due to changes in the NH4+/NO3- ratio and species composition. Clipping and shading reduced N-15 recovery, mainly because they decreased C supply for N uptake by reducing photosynthesis. Conclusions These findings indicate that the reduction of the C input to soil decreases N-15 recovery by plants in temperate grasslands, which contributes to our understanding of the trade-off between C and N and grassland N cycles.
KeywordN-15-NO3- N-15-NH4+ Temperate grassland Grazing N-15 isotope labeling N-15 recovery
DOI10.1007/s11104-018-3844-x
WOS KeywordLEYMUS-CHINENSIS POACEAE ; NET N MINERALIZATION ; VULGARIS L. PLANTS ; INNER-MONGOLIA ; NORTHERN CHINA ; NITROGEN MINERALIZATION ; LOESS PLATEAU ; CARBON SEQUESTRATION ; PRIMARY PRODUCTIVITY ; COMPENSATORY GROWTH
Indexed BySCI
Language英语
Funding ProjectNational Key R&D Program of China[2017YFA0604802] ; National Natural Science Foundation of China[31470560] ; National Natural Science Foundation of China[41601318]
Funding OrganizationNational Key R&D Program of China ; National Natural Science Foundation of China
WOS Research AreaAgriculture ; Plant Sciences
WOS SubjectAgronomy ; Plant Sciences ; Soil Science
WOS IDWOS:000449754900024
PublisherSPRINGER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/52489
Collection中国科学院地理科学与资源研究所
Corresponding AuthorXu, Xingliang; Ouyang, Hua
Affiliation1.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, 11A Datun Rd, Beijing 100101, Peoples R China
2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China
3.Univ Gottingen, Dept Agr Soil Sci, D-37077 Gottingen, Germany
Recommended Citation
GB/T 7714
Pang, Rui,Sun, Yue,Xu, Xingliang,et al. Effects of clipping and shading on (NO3-)-N-15 and (NH4+)-N-15 recovery by plants in grazed and ungrazed temperate grasslands[J]. PLANT AND SOIL,2018,433(1-2):339-352.
APA Pang, Rui,Sun, Yue,Xu, Xingliang,Song, Minghua,&Ouyang, Hua.(2018).Effects of clipping and shading on (NO3-)-N-15 and (NH4+)-N-15 recovery by plants in grazed and ungrazed temperate grasslands.PLANT AND SOIL,433(1-2),339-352.
MLA Pang, Rui,et al."Effects of clipping and shading on (NO3-)-N-15 and (NH4+)-N-15 recovery by plants in grazed and ungrazed temperate grasslands".PLANT AND SOIL 433.1-2(2018):339-352.
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