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  4. 中科院海岸带环境过程与生态修复重点实验室
Warming-dominated climate change impacts on soil organic carbon fractions and aggregate stability in Mollisols

文献类型：期刊论文

作者Zhou, Meng3,4; Xiao, Yang3,4; Zhang, Xingyi4; Sui, Yueyu4; Xiao, Leilei2; Lin, Jinkuo1; Cruse, Richard M.5; Ding, Guangwei6; Liu, Xiaobing3,4,7
刊名GEODERMA
出版日期2023-10-01
卷号438页码:14
ISSN号0016-7061
关键词Carbohydrate Lignin FTIR Solid-state13C NMR Particulate organic matter Silt and clay fractions
DOI10.1016/j.geoderma.2023.116618
通讯作者Liu, Xiaobing(liuxb@iga.ac.cn)
英文摘要Mollisols contain high amounts of soil organic carbon (SOC), which is highly susceptible to climate change; thus, climate change could indirectly influence soil aggregate stability, but the dominant factor affecting aggregate stability remains controversial. Here, a soil transplanting test from high-latitude to low-latitude locations was initiated in 2004 to investigate the influences of warming-dominated climate change (approximately 3-4.7 celcius) on the quantity and molecular composition of OC fractions in surface (0-20 cm) soils, aggregate stability changes and underlying mechanisms. Different initial soil organic matter (SOM) contents of 50.6 g kg � 1 (SOM5), 58.8 g kg � 1 (SOM6), and 108.9 g kg- 1 (SOM11) were established in situ soils and in transplanted soils to simulate warming. The 15-year warming-dominated climate change presented no noticeable change in the SOC content in the lower SOM Mollisols (SOM5 and SOM6) but increased the SOC content by 13.3% in the higher SOM Mollisol (SOM11). In terms of labile OC fractions, warming-dominated climate change significantly increased the dissolved organic carbon (DOC) content by 20.1%-47.7% but reduced the easily oxidizable organic carbon (EOC) and microbial biomass carbon (MBC) contents by 22.1%-33.6%. Irrespective of any treatment, warming-dominated climate change decreased soil aggregate stability, as evidenced by the reduction in mean weight diameter (MWD) and geometric mean diameter (GMD) of 41.7%-79.3% and an increase in fractal dimension (D) of 28.6%-58.5%. For hierarchically organized soil aggregates, warming-dominated climate change increased the proportion and OC content of particulate organic matter inside free microaggregates (Fm-POM) as well as nonaggregated silt + clay-sized organic matter (nA-MOM). However, climate change decreased the proportion and OC content of silt + clay-sized fractions inside microaggregates within macroaggregates (mM-MOM). Of importance, warming-dominated climate change increased the amount of carbohydrates and decreased the amount of lignin in the mM-MOM, Fm-POM, and nAMOM fractions. Therefore, we speculated that chemical protection by mineral association within macroaggregates and nA-MOM fractions and physical protection by the occlusion of POM within free microaggregates might be the primary mechanisms for SOC stabilization under long-term climate change in Mollisols. The long-term warming-dominated climate change results demonstrated a positive effect on SOC content in higher SOM Mollisols, DOC, carbohydrate C, free microaggregate-associated C and nonaggregated silt + clay-sized associated C but exhibited a negative effect on EOC, MBC, lignin C, silt + clay-sized inside microaggregates within macroaggregates C and aggregate stability. These variables all contributed to the reduction in soil aggregate stability and might act as sensitive indicators of warming-dominated climate change in Mollisols, which in turn affect farmland ecosystem C fluxes in response to further climate change.
WOS关键词STATE C-13 NMR ; MICROBIAL COMMUNITY ; LAND-USE ; STABILIZATION MECHANISMS ; THERMAL-ACCLIMATION ; MATTER ; RESPIRATION ; TEMPERATURE ; POOLS ; MANAGEMENT
WOS研究方向Agriculture
语种英语
WOS记录号WOS:001048977800001
资助机构National Key R amp;D Program of China ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Professional Association of the Alliance of International Science Organizations ; Excellent Young Program of the Natural Science Foundation of Heilongjiang Province in China
源URL[http://ir.yic.ac.cn/handle/133337/33444]  
专题烟台海岸带研究所_中科院海岸带环境过程与生态修复重点实验室
烟台海岸带研究所_近岸生态与环境实验室
通讯作者Liu, Xiaobing
作者单位1.Shandong Normal Univ, Coll Geog & Environm, Jinan 250300, Peoples R China
2.Chinese Acad Sci, Yantai Inst Coastal Zone Res, Key Lab Coastal Environm Proc & Ecol Remediat, Yantai 264003, Peoples R China
3.Northeast Agr Univ, Coll Resources & Environm, Harbin 150030, Peoples R China
4.Chinese Acad Sci, Northeast Inst Geog & Agroecol, State Key Lab Black Soils Conservat & Utilizat, Harbin 150081, Peoples R China
5.Iowa State Univ, Dept Agron, Ames, IA USA
6.Northern State Univ, Chem Dept, Aberdeen, SD 57401 USA
7.Chinese Acad Sci, Northeast Inst Geog & Agroecol, Harbin, Peoples R China
推荐引用方式
GB/T 7714		 Zhou, Meng,Xiao, Yang,Zhang, Xingyi,et al. Warming-dominated climate change impacts on soil organic carbon fractions and aggregate stability in Mollisols[J]. GEODERMA,2023,438:14.
APA Zhou, Meng.,Xiao, Yang.,Zhang, Xingyi.,Sui, Yueyu.,Xiao, Leilei.,...&Liu, Xiaobing.(2023).Warming-dominated climate change impacts on soil organic carbon fractions and aggregate stability in Mollisols.GEODERMA,438,14.
MLA Zhou, Meng,et al."Warming-dominated climate change impacts on soil organic carbon fractions and aggregate stability in Mollisols".GEODERMA 438(2023):14.

入库方式： OAI收割

来源：烟台海岸带研究所

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