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Plasticity of fine-root functional traits in the litter layer in response to nitrogen addition in a subtropical forest plantation
Liu, Ruiqiang1,2; Huang, Zhiqun1; McCormack, M. Luke3,4; Zhou, Xuhui2; Wan, Xiaohua1; Yu, Zaipeng1; Wang, Minhuang1; Zheng, Lujia1
2017-06-01
Source PublicationPLANT AND SOIL
ISSN0032-079X
Volume415Issue:1-2Pages:317-330
Corresponding AuthorHuang, Zhiqun(zhiqunhuang@hotmail.com)
AbstractFine-root traits mediate the capacity of plants to acquire soil resources in different environments. This study aimed to examine the changes of fine-root traits when roots proliferate into the litter layer vs. mineral soils, and to determine fine-root trait plasticity of these roots in response to nitrogen (N) addition. A one-year N addition experiment was conducted in a 22-year-old broadleaf Mytilaria laosensis (Hamamelidaceae) plantation in subtropical China. Newly produced fine roots were collected monthly from the litter layer and upper mineral soil (0-10 cm) layer to measure root morphological traits and nutrient concentrations. Fine-root production was determined using ingrowth mesh screens in the litter layer. Fine-root production in the litter layer in the Mytilaria laosensis plantation was 2.6 g m(-2) yr.(-1) but increased 3- to 5-fold with N addition. Significant differences in fine-root morphological traits and nutrient concentrations were found between the litter layer and 0-10 cm mineral soil layer. Fine roots in the litter layer were thinner, with higher specific root length (SRL), higher specific root area (SRA), a higher proportion of fine-root biomass in lower, more absorptive root orders, and lower root tissue density (RTD) than those in 0-10 cm mineral soil layer. Higher carbon (C), N, phosphorus (P), potassium (K), calcium (Ca), magnesium (Mg) concentrations and lower C:N ratio (C/N) were also observed in fine roots in the litter layer, compared to the 0-10 cm mineral soil layer. Nitrogen addition significantly increased root P, K, and Ca concentrations, but had no effect on Mg concentration. Nitrogen addition did not affect most fine-root morphological traits but did result in decreased root diameter. Compared with the mineral soil, roots produced in the litter layer generally reflected a more absorptive strategy with smaller root diameter and lower RTD and with higher SRL, SRA, and nutrient concentrations which together are generally associated with more metabolically active, but shorter lived roots. Strong responses of fine-root production and nutrient concentrations to N addition also suggest that N may be a driving factor for fine-root growth into the litter layer. Further studies are required to identify the effect of fine-root growth into the litter layer on microbial activity.
KeywordFine root Mytilaria laosensis Nitrogen addition Nutrient concentrations Root morphology Trait plasticity
DOI10.1007/s11104-016-3168-7
WOS KeywordNUTRIENT FORAGING STRATEGIES ; LOWLAND TROPICAL FOREST ; AMAZONIAN RAIN-FOREST ; LIFE-SPAN ; TERRESTRIAL ECOSYSTEMS ; MYCORRHIZAL FUNGI ; TEMPERATE FOREST ; GROWTH ; DECOMPOSITION ; TREES
Indexed BySCI
Language英语
Funding ProjectNational Natural Science Foundation of China[41371269] ; National Natural Science Foundation of China[31570604] ; National Natural Science Foundation of China[31625007] ; National 973 Program of China[2014CB954002]
Funding OrganizationNational Natural Science Foundation of China ; National 973 Program of China
WOS Research AreaAgriculture ; Plant Sciences
WOS SubjectAgronomy ; Plant Sciences ; Soil Science
WOS IDWOS:000403495500023
PublisherSPRINGER
Citation statistics
Document Type期刊论文
Identifierhttp://ir.igsnrr.ac.cn/handle/311030/63376
Collection中国科学院地理科学与资源研究所
Corresponding AuthorHuang, Zhiqun
Affiliation1.Fujian Normal Univ, Coll Geog Sci, Minist Sci & Technol & Fujian Prov Funded, Key Lab Subtrop Mt Ecol, Fuzhou 350007, Peoples R China
2.East China Normal Univ, Sch Ecol & Environm Sci, Shanghai 200241, Peoples R China
3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China
4.Univ Minnesota, Dept Plant Biol, 1445 Gortner Ave, St Paul, MN 55108 USA
Recommended Citation
GB/T 7714
Liu, Ruiqiang,Huang, Zhiqun,McCormack, M. Luke,et al. Plasticity of fine-root functional traits in the litter layer in response to nitrogen addition in a subtropical forest plantation[J]. PLANT AND SOIL,2017,415(1-2):317-330.
APA Liu, Ruiqiang.,Huang, Zhiqun.,McCormack, M. Luke.,Zhou, Xuhui.,Wan, Xiaohua.,...&Zheng, Lujia.(2017).Plasticity of fine-root functional traits in the litter layer in response to nitrogen addition in a subtropical forest plantation.PLANT AND SOIL,415(1-2),317-330.
MLA Liu, Ruiqiang,et al."Plasticity of fine-root functional traits in the litter layer in response to nitrogen addition in a subtropical forest plantation".PLANT AND SOIL 415.1-2(2017):317-330.
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