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| Retention of early-spring nitrogen in temperate grasslands: The dynamics of ammonium and nitrate nitrogen differ | |
Ma, Linna; Zhang, Chaoxue1; Feng, Jinchao2; Liu, Guofang; Xu, Xiaofeng3; Lue, Yixia1; He, Weiming1; Wang, Renzhong1
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| 2020 | |
| Source Publication | GLOBAL ECOLOGY AND CONSERVATION
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| Volume | 24 |
| Abstract | In nitrogen (N)-limited temperate regions, winter is an important period of N accumulation. The accumulated N is released during snowmelt and thawing, and the availability peaks in early spring. However, the early-spring dynamics of specific N forms (i.e., ammonium NH4+ and nitrate NO3-) in temperate grasslands are still not fully understood. Here, we added (NH4+)-N-15 and (NO3-)-N-15 (equivalent to 150 mg (15)Nm(-2)) to the soils of a meadow steppe and a typical steppe in northern China immediately after snowmelt, then quantified the retention dynamics of (NH4+)-N-15 and (NO3-)-N-15 in soils, microbes, and plants over the subsequent growing season. Approximately 70% of the added N-15 tracers were initially retained within the soil-microbe-plant systems in both temperate grasslands. In early spring, much N-15 was immobilized in soils and microbes, while little had been taken up by plants. During the subsequent growing season, approximately 45% of the N-15 was rapidly lost by the soils and microbes, but plant N-15 acquisition gradually increased. Although soils and plants retained similar levels of (NH4+)-N-15 and (NO3-)-N-15 during the growing season, soil microbes retained more (NH4+)-N-15 than (NO3-)-N-15. Different plant taxa had distinct N-15 acquisition capacities: perennial grasses and forbs accumulated the N-15 tracers rapidly, while annuals did not. Perennial grasses were effective immobilizers of the (NH4+)-N-15, whereas forbs were effective immobilizers of the (NO3-)-N-15. These findings provided evidence of the substantial retention of early-spring N over the following growing season in temperate grasslands, regardless of the vegetation type and N form. However, it was clear that the dynamics of early-spring (NH4+)-N-15 and (NO3-)-N-15 differed within the soil-microbe-plant systems. (C) 2020 The Authors. Published by Elsevier B.V. |
| Keyword | Early spring Microbial N N-15 labeling N retention Plant N uptake Temperate grassland |
| Subject Area | Biodiversity Conservation ; Ecology |
| DOI | 10.1016/j.gecco.2020.e01335 |
| Indexed By | SCI |
| Language | 英语 |
| WOS Keyword | SOIL MICROBIAL BIOMASS ; ARCTIC TUNDRA ; WINTER ; CARBON ; FOREST ; PLANT ; IMMOBILIZATION ; DEPOSITION ; SNOW ; N-15 |
| WOS Research Area | Biodiversity & Conservation ; Environmental Sciences & Ecology |
| WOS ID | WOS:000608479300024 |
| Publisher | ELSEVIER |
| Subtype | Article |
| Publication Place | AMSTERDAM |
| EISSN | 2351-9894 |
| Funding Organization | National Key Research and Development Program of China [2016YFC0500501] ; National Natural Science Foundation of ChinaNational Natural Science Foundation of China (NSFC) [32071602] ; Chinese Academy of Agriculture Sciences |
| Corresponding Author Email | weiminghe@ibcas.ac.cn ; wangrz@ibcas.ac.cn |
| OA | gold |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.ibcas.ac.cn/handle/2S10CLM1/21471 |
| Collection | 植被与环境变化国家重点实验室 |
| Affiliation | 1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China 2.Univ Chinese Acad Sci, Beijing, Peoples R China 3.Chinese Acad Forestry, Inst Desertificat Studies, Beijing 100091, Peoples R China 4.San Diego State Univ, Dept Biol, San Diego, CA 92182 USA |
| Recommended Citation GB/T 7714 | Ma, Linna,Zhang, Chaoxue,Feng, Jinchao,et al. Retention of early-spring nitrogen in temperate grasslands: The dynamics of ammonium and nitrate nitrogen differ[J]. GLOBAL ECOLOGY AND CONSERVATION,2020,24. |
| APA | Ma, Linna.,Zhang, Chaoxue.,Feng, Jinchao.,Liu, Guofang.,Xu, Xiaofeng.,...&Wang, Renzhong.(2020).Retention of early-spring nitrogen in temperate grasslands: The dynamics of ammonium and nitrate nitrogen differ.GLOBAL ECOLOGY AND CONSERVATION,24. |
| MLA | Ma, Linna,et al."Retention of early-spring nitrogen in temperate grasslands: The dynamics of ammonium and nitrate nitrogen differ".GLOBAL ECOLOGY AND CONSERVATION 24(2020). |
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| 1-s2.0-S235198942030（1722KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Application Full Text | |
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