Tussock microhabitats increase nitrogen uptake by plants in an alpine wetland
Hu, Yi-Heng1; Zhang, Xiao-Ya1; Zhang, Kun2; Song, Ming-Hua3; Gao, Jun-Qin1; Dorodnikov, Maxim4,5,6,7; Soromotin, Andrey7; Kuzyakov, Yakov4,5,7,8
Source PublicationPLANT AND SOIL
Corresponding AuthorGao, Jun-Qin(gaojq@bjfu.edu.cn)
AbstractPurpose Tussock microhabitat is a universal phenomenon in wetlands, where soil and plant properties differ from their surrounding lawns. This study aims to investigate the differences of plant nitrogen (N) uptake between tussocks and lawns, which would further affect ecosystem functions. Methods A N-15 labeling experiment was conducted in tussocks and lawns of an alpine wetland where plant growth is limited by soil available N. N-15 label was injected as NH4+, NO3- or glycine in tussocks and lawns at 0-10 or 10-30 cm depths and traced in plants after two hours. Results The mineral N content was two times higher in the tussocks with better aeration than the lawns. The plant biomass and root-to-shoot ratio were much higher in the tussocks than the lawns. The relative contributions of NH4+, NO3- and glycine to total N uptake were similar between tussocks and lawns at each soil depth, but the plants on the tussocks took up three times more N and had twice the N-15 recovery of the lawns. Conclusion N uptake by plants on the tussocks was 2-4 times higher compared to the lawns likely due to higher plant biomass and root-to-shoot ratio as well as higher mineral N contents in soil. Therefore, despite the area of tussocks being five times smaller than that of lawns, tussocks strongly increase the ecosystem productivity, nutrient utilization and cycling in wetlands.
KeywordMicrohabitats Tussock microrelief Wetland ecosystems N-15 labeling and tracing N uptake pattern Environmental heterogeneity
Indexed BySCI
Funding ProjectNational Natural Science Foundation of China[41871077] ; TerrArctic project[89-DON]
Funding OrganizationNational Natural Science Foundation of China ; TerrArctic project
WOS Research AreaAgriculture ; Plant Sciences
WOS SubjectAgronomy ; Plant Sciences ; Soil Science
WOS IDWOS:000673185100001
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Document Type期刊论文
Corresponding AuthorGao, Jun-Qin
Affiliation1.Beijing Forestry Univ, Sch Ecol & Nat Conservat, Beijing 100083, Peoples R China
2.Southwest Forestry Univ, Natl Plateau Wetlands Res Ctr, Kunming 650224, Yunnan, Peoples R China
3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China
4.Univ Gottingen, Dept Soil Sci Temperate Ecosyst, D-37077 Gottingen, Germany
5.Univ Gottingen, Dept Agr Soil Sci, D-37077 Gottingen, Germany
6.Univ Gottingen, Biogeochem Agr Ecosyst, D-37077 Gottingen, Germany
7.Tyumen State Univ, Tyumen 625003, Russia
8.RUDN Univ, Agrotechnol Inst, Moscow 117198, Russia
Recommended Citation
GB/T 7714
Hu, Yi-Heng,Zhang, Xiao-Ya,Zhang, Kun,et al. Tussock microhabitats increase nitrogen uptake by plants in an alpine wetland[J]. PLANT AND SOIL,2021:12.
APA Hu, Yi-Heng.,Zhang, Xiao-Ya.,Zhang, Kun.,Song, Ming-Hua.,Gao, Jun-Qin.,...&Kuzyakov, Yakov.(2021).Tussock microhabitats increase nitrogen uptake by plants in an alpine wetland.PLANT AND SOIL,12.
MLA Hu, Yi-Heng,et al."Tussock microhabitats increase nitrogen uptake by plants in an alpine wetland".PLANT AND SOIL (2021):12.
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