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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

文献类型：期刊论文

作者Pang, Rui1,3; Sun, Yue1,2; Xu, Xingliang1; Song, Minghua1; Ouyang, Hua1
刊名PLANT AND SOIL
出版日期2018-12-01
卷号433期号:1-2页码:339-352
关键词N-15-NO3- N-15-NH4+ Temperate grassland Grazing N-15 isotope labeling N-15 recovery
ISSN号0032-079X
DOI10.1007/s11104-018-3844-x
通讯作者Xu, Xingliang(xuxl@igsnrr.ac.cn) ; Ouyang, Hua(ohua@igsnrr.ac.cn)
英文摘要Aims 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.
WOS关键词LEYMUS-CHINENSIS POACEAE ; NET N MINERALIZATION ; VULGARIS L. PLANTS ; INNER-MONGOLIA ; NORTHERN CHINA ; NITROGEN MINERALIZATION ; LOESS PLATEAU ; CARBON SEQUESTRATION ; PRIMARY PRODUCTIVITY ; COMPENSATORY GROWTH
资助项目National Key R&D Program of China[2017YFA0604802] ; National Natural Science Foundation of China[31470560] ; National Natural Science Foundation of China[41601318]
WOS研究方向Agriculture ; Plant Sciences
语种英语
WOS记录号WOS:000449754900024
出版者SPRINGER
资助机构National Key R&D Program of China ; National Natural Science Foundation of China
源URL[http://ir.igsnrr.ac.cn/handle/311030/52488]  
专题中国科学院地理科学与资源研究所
通讯作者Xu, Xingliang; Ouyang, Hua
作者单位1.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 Gottingen, Dept Agr Soil Sci, D-37077 Gottingen, Germany
3.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China
推荐引用方式
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.

入库方式： OAI收割

来源：地理科学与资源研究所

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