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
Nitrogen acquisition strategies during the winter-spring transitional period are divergent at the species level yet convergent at the ecosystem level in temperate grasslands

文献类型：期刊论文

作者Ma, Linna; Liu, Guofang; Xu, Xiaofeng4; Xin, Xiaoping3; Bai, Wenming; Zhang, Lihua; Chen, Shiping; Wang, Renzhong1
刊名SOIL BIOLOGY & BIOCHEMISTRY
出版日期2018
卷号122页码:150-159
关键词Early spring Microbial biomass N-15 labeling Plant-soil feedback Plant N uptake Temperate grassland
ISSN号0038-0717
DOI10.1016/j.soilbio.2018.04.020
文献子类Article
英文摘要Nitrogen (N) is a major limiting element for productivity in temperate grasslands, particularly during early spring when soil N availability is low and the vegetative demand for it is high. Therefore, knowing whether and how plant species adopt different N acquisition strategies during the winter-spring transitional period is essential for understanding ecosystem functioning in temperate grasslands. In this study, parallel experiments with N-15 tracer were conducted to examine plant N acquisition strategies during winter-spring transition in a meadow and a typical steppe in northern China. We found that soil microbes immobilized 20% of the N-15 tracer during the spring thawing period at both sites, and then released half of it back to the soil before late spring, confirming that soil microbes competed effectively with the plant roots for mineral N in early spring. Perennial bunch grasses adopted an active N acquisition strategy at the beginning of the spring thawing period. In contrast, perennial forbs and rhizome grasses began to take up N in the middle of the spring thawing period, and they acquired more N than the bunch grasses. However, sagebrushes and legumes accounted for little N-15 recovery, indicating their dependence on internal N accumulation or N fixation. At the ecosystem level, no significant difference in the magnitude of plant N-15 uptake was observed between the meadow steppe and typical steppe, although the plant biomass N in the meadow steppe was twice that of the typical steppe during the thawing period. This was attributed to the higher soil inorganic N and faster net N mineralization rate in the meadow steppe than in the typical steppe. Our results suggest that temporal niche differentiation in N acquisition during early spring may facilitate species coexistence in temperate grasslands despite strong plant-microbe or plant-plant competition for N. The divergent N acquisition strategies at the species level and convergent N acquisition strategies at the ecosystem level should be considered for model development to better simulate vegetation growth particularly under spring N stress.
学科主题Soil Science
出版地OXFORD
WOS关键词SOIL MICROBIAL BIOMASS ; INORGANIC NITROGEN ; ARCTIC TUNDRA ; POPULATION-DYNAMICS ; COMMUNITY STRUCTURE ; SEASONAL DYNAMICS ; ALPINE ECOSYSTEM ; LEYMUS-CHINENSIS ; NORTHERN CHINA ; CARBON
语种英语
WOS记录号WOS:000435053800016
出版者PERGAMON-ELSEVIER SCIENCE LTD
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) [31770527] ; Chinese Academy of Agriculture Sciences and Hulunber Grassland Ecosystem Observation and Research Station ; San Diego State University ; U.S. National Science FoundationNational Science Foundation (NSF) [1702797]
源URL[http://ir.ibcas.ac.cn/handle/2S10CLM1/20666]  
专题植被与环境变化国家重点实验室
作者单位1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China
2.Chinese Acad Agr Sci, Inst Agr Resources & Reg Planning, Beijing 100081, Peoples R China
3.San Diego State Univ, Biol Dept, San Diego, CA 92182 USA
4.Univ Chinese Acad Sci, Beijing, Peoples R China
推荐引用方式
GB/T 7714		 Ma, Linna,Liu, Guofang,Xu, Xiaofeng,et al. Nitrogen acquisition strategies during the winter-spring transitional period are divergent at the species level yet convergent at the ecosystem level in temperate grasslands[J]. SOIL BIOLOGY & BIOCHEMISTRY,2018,122:150-159.
APA Ma, Linna.,Liu, Guofang.,Xu, Xiaofeng.,Xin, Xiaoping.,Bai, Wenming.,...&Wang, Renzhong.(2018).Nitrogen acquisition strategies during the winter-spring transitional period are divergent at the species level yet convergent at the ecosystem level in temperate grasslands.SOIL BIOLOGY & BIOCHEMISTRY,122,150-159.
MLA Ma, Linna,et al."Nitrogen acquisition strategies during the winter-spring transitional period are divergent at the species level yet convergent at the ecosystem level in temperate grasslands".SOIL BIOLOGY & BIOCHEMISTRY 122(2018):150-159.

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。