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Response of fine root decomposition to different forms of N deposition in a temperate grassland

文献类型：期刊论文

作者Dong, Lili; Berg, Bjorn1,2; Sun, Tao5; Wang, Zhengwen; Han, Xingguo4
刊名SOIL BIOLOGY & BIOCHEMISTRY
出版日期2020
卷号147
关键词Root decomposition Nitrogen deposition Inorganic nitrogen Organic nitrogen Grassland
ISSN号0038-0717
DOI10.1016/j.soilbio.2020.107845
文献子类Article
英文摘要Despite the importance of plant litter decomposition for ecosystem nutrient cycling and soil fertility, it is still largely unknown how this biogeochemical process is affected by different forms of nitrogen (N). Numerous studies have investigated the effects of exogenous N addition on leaf litter decomposition, while the response of decomposing roots and their microbial communities to externally applied N is rarely studied. Fine roots, however, represent a key input to soil organic matter and understanding their decomposition under elevated atmospheric N deposition is important for predicting soil carbon (C) dynamics in response to changes in climatic conditions. In this study, we decomposed fine roots of five dominant grassland species for two years in field plots fertilized with different forms of N in a typical temperate grassland in Inner Mongolia. Ammonium nitrate was selected as inorganic N (IN), while urea and glycine were chosen as organic N (ON). Equal amounts of N (10 g N.m(-2).yr(-1)) with different ratios of IN: ON (control, 10 : 0, 7 : 3, 5 : 5, 3 : 7, and 0 : 10) were added to the soil. Our results showed that all exogenous N additions, either IN or ON forms, stimulated the decomposition rates across species. Furthermore, the treatment with a mixture of IN and ON fertilizers led to the strongest responses in decomposition rate, which were, on average, 20% higher than control, and 12% higher than using just IN addition across the five studied species. Our results suggest that we need to consider the different components in N deposition when examining nitrogen deposition effects on terrestrial ecosystem carbon and nutrient cycles.
学科主题Soil Science
出版地OXFORD
WOS关键词ORGANIC NITROGEN DEPOSITION ; EXTRACELLULAR ENZYME-ACTIVITIES ; LITTER DECOMPOSITION ; MICROBIAL COMMUNITY ; SEMIARID GRASSLAND ; WOODY ROOTS ; FOREST ; CARBON ; RATES ; DIVERSITY
WOS研究方向Agriculture
语种英语
WOS记录号WOS:000541372500014
出版者PERGAMON-ELSEVIER SCIENCE LTD
资助机构National Key Research and Development Program of China [2016YFC0500602] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [31901137] ; China Postdoctoral Science FoundationChina Postdoctoral Science Foundation [2018M640263] ; State Key Laboratory of Vegetation and Environmental Change [LVEC-2019kf06] ; CAS Key Laboratory of Tropical Forest Ecology, Xishuangbanna Tropical Botanical Garden, Chinese Academy of SciencesChinese Academy of Sciences ; Key Laboratory of Vegetation Ecology, Ministry of Education, Institute of Grassland Science, Northeast Normal University
源URL[http://ir.ibcas.ac.cn/handle/2S10CLM1/21713]  
专题植被与环境变化国家重点实验室
作者单位1.Univ Helsinki, Dept Forest Sci, FIN-00014 Helsinki, Finland
2.Chinese Acad Sci, Inst Appl Ecol, Erguna Forest Steppe Ecotone Res Stn, Shenyang 110016, Peoples R China
3.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat Environm Change, Beijing 100093, Peoples R China
4.Chinese Acad Sci, Inst Appl Ecol, Key Lab Forest Ecol & Management, Shenyang 110016, Peoples R China
5.Univ Gavle, Sect Biol, SE-80176 Gavle, Sweden
推荐引用方式
GB/T 7714		 Dong, Lili,Berg, Bjorn,Sun, Tao,et al. Response of fine root decomposition to different forms of N deposition in a temperate grassland[J]. SOIL BIOLOGY & BIOCHEMISTRY,2020,147.
APA Dong, Lili,Berg, Bjorn,Sun, Tao,Wang, Zhengwen,&Han, Xingguo.(2020).Response of fine root decomposition to different forms of N deposition in a temperate grassland.SOIL BIOLOGY & BIOCHEMISTRY,147.
MLA Dong, Lili,et al."Response of fine root decomposition to different forms of N deposition in a temperate grassland".SOIL BIOLOGY & BIOCHEMISTRY 147(2020).

入库方式： OAI收割

来源：植物研究所

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