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Strong priming of soil organic matter induced by frequent input of labile carbon
Zhou,Jie; Wen,Yuan; Shi,Lingling; Marshall,Miles R.; Kuzyakov,Yakov; Blagodatskaya,Evgenia; Zang,Huadong
2021
发表期刊SOIL BIOLOGY & BIOCHEMISTRY
ISSN0038-0717
卷号152页码:108069
摘要Labile carbon (C) inputs to soil (e.g., litter and root exudation) can prime soil organic matter (SOM) decomposition, and strongly influence SOM dynamics. The direction and intensity of priming, as well as the net C balance in soil, depend on the amount and frequency of labile C inputs. Most recent priming studies are based on single C additions, which are not truly representative of common litter inputs or root exudation in terrestrial ecosystems. Here, we evaluated the effects of C-14-labeled glucose addition to soil in the same final amounts (360 mu g C g(-1)) split into two temporal patterns: seldom (20% of microbial biomass every two months) and frequent addition (4% of microbial biomass every 10 days) on the dynamics of CO2 production and SOM priming over a 200-day incubation. For the first time, we combined enzyme kinetics with substrate-induced growth respiration and fungal diversity to monitor microbially mediated SOM mineralization in response to the labile C input frequency. Frequent glucose addition decreased C-14 incorporation into microbial biomass and almost doubled cumulative priming compared to seldom addition, resulting in a net loss of SOM for seldom and frequent C additions of 94 and 367 mu g C g(-1) respectively. Larger priming loss of SOM with frequent C inputs was accompanied by increased activities of beta-glucosidase, chitinase, and acid phosphatase, and by a shift in fungal community towards increased abundance of K-strategist fungal species (mainly Mortierellales sp. and Trichoderma sp.) capable of SOM mineralization. In conclusion, frequent labile C inputs (e.g., rhizodeposits in rhizosphere or litterfall in disturephere) to soil will stimulate a shift in fungal community structure and functions, resulting in intensive priming of SOM decomposition and CO2 losses.
关键词Carbon balance Enzyme kinetics Fungal community Microbial growth kinetics Priming effect Soil organic matter MICROBIAL BIOMASS ATMOSPHERIC CO2 DIVERSITY NITROGEN DECOMPOSITION MECHANISMS GLUCOSE FUNGI IDENTIFICATION SEQUESTRATION
DOI10.1016/j.soilbio.2020.108069
WOS记录号WOS:000595644500009
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文献类型期刊论文
条目标识符http://ir.kib.ac.cn/handle/151853/73097
专题中国科学院昆明植物研究所
作者单位1.China Agr Univ, Coll Agron & Biotechnol, Beijing, Peoples R China
2.Georg August Univ Gottingen, Dept Crop Sci, Biogeochem Agroecosyst, Gottingen, Germany
3.Chinese Acad Sci, Inst Bot, Key Lab Econ Plants & Biotechnol, Kunming, Yunnan, Peoples R China
4.China & East Asia Off, World Agroforestry Ctr, Kunming, Yunnan, Peoples R China
5.Marshall, Miles R.] Bangor Univ, Sch Nat Sci, Bangor LL57 2UW, Gwynedd, Wales
6.Georg August Univ Gottingen, Dept Soil Sci Temperate Ecosyst, Gottingen, Germany
7.Georg August Univ Gottingen, Dept Agr Soil Sci, Gottingen, Germany
8.RUDN Univ, Agrotechnol Inst, Moscow, Russia
9.UFZ Helmholtz Ctr Environm Res, Dept Soil Ecol, Halle, Germany
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Zhou,Jie,Wen,Yuan,Shi,Lingling,et al. Strong priming of soil organic matter induced by frequent input of labile carbon[J]. SOIL BIOLOGY & BIOCHEMISTRY,2021,152:108069.
APA Zhou,Jie.,Wen,Yuan.,Shi,Lingling.,Marshall,Miles R..,Kuzyakov,Yakov.,...&Zang,Huadong.(2021).Strong priming of soil organic matter induced by frequent input of labile carbon.SOIL BIOLOGY & BIOCHEMISTRY,152,108069.
MLA Zhou,Jie,et al."Strong priming of soil organic matter induced by frequent input of labile carbon".SOIL BIOLOGY & BIOCHEMISTRY 152(2021):108069.
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