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. 成都生物研究所
  3. 中国科学院成都生物研究所
  4. 生物多样性与生态系统服务领域
  5. 生态系统恢复与生物多样性保育四川省重点实验室
Resource stoichiometry mediates soil C loss and nutrient transformations in forest soils

文献类型：期刊论文

作者Yin, Huajun1; Phillips, Richard P.2; Liang, Rubiao1; Xu, Zhenfeng3; Liu, Qing1
刊名APPLIED SOIL ECOLOGY
出版日期2016-12
卷号108页码:248-257
ISSN号0929-1393
关键词Rhizosphere Exudate Soil microbial community Soil carbon pool Nutrient availability Subalpine coniferous forest
DOI10.1016/j.apsoil.2016.09.001
产权排序1
文献子类Article
英文摘要Root exudation is increasingly being recognized as an important driver of ecosystem processes; however, few studies have examined the degree to which variations in exudate stoichiometry and soil resources affect microbial controls of nutrient availability and decomposition. We added root exudate mimics of varying chemical quality to soils collected from two adjacent forest stands (one a similar to 70 year-old spruce plantation, the other a similar to 200 year-old spruce-fir forest) that differ strongly in N availability. The exudate treatments were added for 50 consecutive days, and included water (control), C alone, N alone, and three combinations of C and N that varied stoichiometrically (i.e., C:N ratio of 10, 50 and 100). Exudate additions containing little or no N promoted the greatest losses of soil C in two soils, with the greatest losses occurring in the moderately labile (i.e., acid-extractable) fraction of the low N plantation soils. However, despite the uniformity of priming effects between sites (similar to 7% loss of soil C for both), there was little congruence in exudate-induced effects on microbial biomass and activity. In the plantation soils, exudates generally increased microbial biomass (especially fungi), accelerated N cycling and increased lignin-degrading enzyme activities relative to controls. In contrast, exudate additions to spruce-fir soils mostly decreased microbial biomass, decelerated N cycling, and had variable impacts on lignin degrading enzyme activities (decreased phenol oxidase but increased peroxidase). Collectively, this study suggests that while root exudates with low C and N have the potential to accelerate soil C losses by stimulating microbes to mine N from soil organic matter, the consequences of exudate inputs on nutrient fluxes are less predictable, and may hinge on the recalcitrance of (soil organic matter) SOM, N availability and microbial communities. (C) 2016 Elsevier B.V. All rights reserved.
学科主题Agriculture/agronomy
URL标识查看原文
WOS关键词MICROBIAL COMMUNITY COMPOSITION ; EASTERN TIBETAN PLATEAU ; ROOT-INDUCED CHANGES ; ORGANIC-MATTER ; NITROGEN TRANSFORMATIONS ; CARBON INPUTS ; RHIZOSPHERE ; BACTERIAL ; ECOSYSTEM ; TURNOVER
WOS研究方向Agriculture
语种英语
出版者ELSEVIER SCIENCE BV
WOS记录号WOS:000386643800028
源URL[http://210.75.237.14/handle/351003/29900]  
专题生物多样性与生态系统服务领域_生态系统恢复与生物多样性保育四川省重点实验室
成都生物研究所_生态研究
生物多样性与生态系统服务领域_中国科学院山地生态恢复与生物资源利用重点实验室
生物多样性与生态系统服务领域_生态研究
通讯作者Liu, Qing
作者单位1.Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization & Ecological Restoration and Biodiversity Conservation, Chengdu Institute of Biology, Chinese Academy of Sciences, No. 9 Section 4, Renmin Nan Road, Chengdu, 610041, China;
2.Indiana Univ, Dept Biol, 1001 E Third St, Bloomington, IN 47403 USA;
3.Sichuan Agr Univ, Inst Forest & Ecol, Key Lab Ecol Forestry Engn, Chengdu 611130, Peoples R China
推荐引用方式
GB/T 7714		 Yin, Huajun,Phillips, Richard P.,Liang, Rubiao,et al. Resource stoichiometry mediates soil C loss and nutrient transformations in forest soils[J]. APPLIED SOIL ECOLOGY,2016,108:248-257.
APA Yin, Huajun,Phillips, Richard P.,Liang, Rubiao,Xu, Zhenfeng,&Liu, Qing.(2016).Resource stoichiometry mediates soil C loss and nutrient transformations in forest soils.APPLIED SOIL ECOLOGY,108,248-257.
MLA Yin, Huajun,et al."Resource stoichiometry mediates soil C loss and nutrient transformations in forest soils".APPLIED SOIL ECOLOGY 108(2016):248-257.

入库方式： OAI收割

来源：成都生物研究所

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。