中国科学院机构知识库网格
Chinese Academy of Sciences Institutional Repositories Grid
首页 机构 成果 学者
  
  1. CAS IR Grid
  2. 植物研究所
  3. 中国科学院植物研究所
  4. 植被与环境变化国家重点实验室
Retention of early-spring nitrogen in temperate grasslands: The dynamics of ammonium and nitrate nitrogen differ

文献类型：期刊论文

作者Ma, Linna; Zhang, Chaoxue2; Feng, Jinchao3; Liu, Guofang; Xu, Xiaofeng1; Lue, Yixia2; He, Weiming2; Wang, Renzhong2
刊名GLOBAL ECOLOGY AND CONSERVATION
出版日期2020
卷号24
关键词Early spring Microbial N N-15 labeling N retention Plant N uptake Temperate grassland
DOI10.1016/j.gecco.2020.e01335
文献子类Article
英文摘要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.
学科主题Biodiversity Conservation ; Ecology
出版地AMSTERDAM
电子版国际标准刊号2351-9894
WOS关键词SOIL MICROBIAL BIOMASS ; ARCTIC TUNDRA ; WINTER ; CARBON ; FOREST ; PLANT ; IMMOBILIZATION ; DEPOSITION ; SNOW ; N-15
WOS研究方向Biodiversity & Conservation ; Environmental Sciences & Ecology
语种英语
WOS记录号WOS:000608479300024
出版者ELSEVIER
资助机构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
源URL[http://ir.ibcas.ac.cn/handle/2S10CLM1/21471]  
专题植被与环境变化国家重点实验室
作者单位1.Chinese Acad Forestry, Inst Desertificat Studies, Beijing 100091, Peoples R China
2.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China
3.Univ Chinese Acad Sci, Beijing, Peoples R China
4.San Diego State Univ, Dept Biol, San Diego, CA 92182 USA
推荐引用方式
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).

入库方式： OAI收割

来源：植物研究所

浏览0
下载0
收藏0
其他版本

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。