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Vertical variations in plant- and microbial-derived carbon components in grassland soils
Ma, Tian1; Dai, Guohua; Zhu, Shanshan1; Chen, Dima; Chen, Litong3; Lu, Xiao-Tao; Wang, Xiaobo4; Zhu, Juntao5; Zhang, Yangjian1,5; He, Jin-Sheng; Bai, Yongfei; Han, Xingguo1; Feng, Xiaojuan1
Source PublicationPLANT AND SOIL
AbstractAims Owing to different soil environments and organic carbon sources, soil organic carbon (SOC) composition and preservation mechanisms may vary substantially in deep versus surface soils. This study examines vertical variation of various SOC components (including lignin phenols, cutin, suberin and microbial lipids) across the Chinese-Mongolian grasslands. Methods Lignin phenols and hydrolysable lipids were isolated by cupric oxide oxidation and alkaline hydrolysis, respectively. A comprehensive list of environmental variables was compiled to disentangle influencing factors for the variation of various components at four different depths. Results Lignin phenols, suberin and microbial lipids were most abundant in the surface soil (0-10 cm). Ratios of cutin to suberin and microbial lipids to lignin phenols (in the alpine grasslands) were higher in the bottom-most soil. Calcium (Ca) rather than iron (Fe) plays an important role in the preservation of cutin and microbial lipids in the bottom soil with a high Ca:Fe ratio and high pH. The incorporation efficiency of suberin was higher in deeper than surface soils and showed an increasing trend with depth in the alpine (but not temperate) grasslands. Conclusions Compared to surface soils, the incorporation of root-derived carbon into SOC is more efficient in deeper soils due to stronger mineral protection and weaker microbial decomposition. Root-derived carbon is more important for SOC accrual in the alpine than temperate grasslands, especially at depth. These findings reveal differential distribution patterns and preservation mechanisms for SOC components in the surface versus deep soils, providing new information to understand SOC stability at different depths.
KeywordDeep soils Distribution patterns Preservation mechanisms Soil organic carbon Chinese-Mongolian grasslands
Subject AreaAgronomy ; Plant Sciences ; Soil Science
Indexed BySCI
WOS Research AreaAgriculture ; Plant Sciences
WOS IDWOS:000511594900028
Publication PlaceDORDRECHT
Corresponding Author Emailxfeng@ibcas.ac.cn
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Cited Times:3[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Affiliation1.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing 100093, Peoples R China
2.Univ Chinese Acad Sci, Coll Resources & Environm, Beijing 100049, Peoples R China
3.Lanzhou Univ, Coll Pastoral Agr Sci & Technol, State Key Lab Grassland & Agroecosyst, Lanzhou 730020, Peoples R China
4.Chinese Acad Sci, Northwest Inst Plateau Biol, Key Lab Adaptat & Evolut Plateau Biota, Xining 810008, Peoples R China
5.Chinese Acad Sci, Inst Appl Ecol, Shenyang 110016, Peoples R China
6.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China
7.Peking Univ, Dept Ecol, Coll Urban & Environm Sci, Beijing 100871, Peoples R China
Recommended Citation
GB/T 7714
Ma, Tian,Dai, Guohua,Zhu, Shanshan,et al. Vertical variations in plant- and microbial-derived carbon components in grassland soils[J]. PLANT AND SOIL,2020,446(1-2):441-455.
APA Ma, Tian.,Dai, Guohua.,Zhu, Shanshan.,Chen, Dima.,Chen, Litong.,...&Feng, Xiaojuan.(2020).Vertical variations in plant- and microbial-derived carbon components in grassland soils.PLANT AND SOIL,446(1-2),441-455.
MLA Ma, Tian,et al."Vertical variations in plant- and microbial-derived carbon components in grassland soils".PLANT AND SOIL 446.1-2(2020):441-455.
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