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Effects of forest floor characteristics on soil labile carbon as varied by topography and vegetation type in the Chinese Loess Plateau

文献类型：期刊论文

作者Wang, Baorong2,3; Liu, Dong4; Yang, Jiajia1; Zhu, Zhaolong5; Darboux, Frederic5; Jiao, Juying4; An, Shaoshan2,4
刊名CATENA
出版日期2021
卷号196页码:13
关键词Soil labile carbon fractions Forest floor Vegetation type Slope Loess Plateau
ISSN号0341-8162
DOI10.1016/j.catena.2020.104825
通讯作者An, Shaoshan(shan@ms.iswc.ac.cn)
英文摘要Vegetation type and topographic characteristics are important factors that affect the amount and spatial distribution of the forest floor and the soil carbon cycling. However, the relationships among vegetation type, topographic characteristics, forest floor properties, soil properties and soil labile organic carbon (LOC) fractions remain to be elucidated. Here, we conducted a field observational study to explore the relationships between the soil LOC fractions (microbial biomass carbon (MBC), extractable organic carbon (EOC) and permanganate oxidizable carbon (Pox-C)) and forest floor characteristics under various vegetation types (forest, forest-steppe and steppe) and topographic features (slope position and aspect). Our results showed that the vegetation type and topography are both important factors that significantly influence the forest floor properties (i.e., stock, thickness and coverage). The soil total nitrogen and phosphorus were significantly increased, and the soil pH and bulk density were decreased, with an increase in litter stock, coverage and thickness. Simultaneously, the SOC and soil LOC fractions were increased significantly with the increase in litter stock, coverage and thickness. Over 50% of the variation in the SOC and soil LOC fractions was jointly explained by environmental factors, litter properties and soil properties. Our results demonstrated that the SOC and soil LOC fractions are directly influenced by soil physical and chemical properties (e.g., pH, bulk density and soil total nitrogen) and indirectly affected by external environmental factors. Changes in vegetation and topography lead to increases in the litter stock, coverage, thickness and water content in the backslope position and northern slope, which could create favorable soil nutrient and environmental conditions (e.g., higher soil moisture and lower bulk density) to further enhance SOC and soil LOC fraction sequestration. The forest floor potentially links environmental factors and soil properties and serves as an important factor for soil C cycling.
WOS关键词LAND-USE CHANGE ; ORGANIC-MATTER REMOVAL ; LITTER DECOMPOSITION ; MICROBIAL BIOMASS ; SLOPE ASPECT ; TOTAL NITROGEN ; FRACTIONS ; MANAGEMENT ; IMPACT ; POOLS
资助项目National Natural Sciences Foundation of China[41671280] ; National Natural Sciences Foundation of China[41771317] ; National Natural Sciences Foundation of China[41877074] ; key projects in the National Science & Technology Pillar Program during the Twelfth Five-Year Plan period[2015BAC01B01] ; Chinese Academy of Sciences[161461KYSB20170013]
WOS研究方向Geology ; Agriculture ; Water Resources
语种英语
WOS记录号WOS:000583955200014
出版者ELSEVIER
资助机构National Natural Sciences Foundation of China ; key projects in the National Science & Technology Pillar Program during the Twelfth Five-Year Plan period ; Chinese Academy of Sciences
源URL[http://ir.igsnrr.ac.cn/handle/311030/156405]  
专题中国科学院地理科学与资源研究所
通讯作者An, Shaoshan
作者单位1.Northwest A&F Univ, Coll Nat Resources & Environm, Yangling 712100, Shaanxi, Peoples R China
2.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, State Key Lab Soil Eros & Thyland Fanning Loess P, Yangling 712100, Shaanxi, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Northwest A&F Univ, Inst Soil & Water Conservat, State Key Lab Soil Eros & Thyland Fanning Loess P, Yangling 712100, Shaanxi, Peoples R China
5.INRA, Lab Sols & Environm, UMR 1120, F-54518 Vandoeuvre Les Nancy, France
推荐引用方式
GB/T 7714		 Wang, Baorong,Liu, Dong,Yang, Jiajia,et al. Effects of forest floor characteristics on soil labile carbon as varied by topography and vegetation type in the Chinese Loess Plateau[J]. CATENA,2021,196:13.
APA Wang, Baorong.,Liu, Dong.,Yang, Jiajia.,Zhu, Zhaolong.,Darboux, Frederic.,...&An, Shaoshan.(2021).Effects of forest floor characteristics on soil labile carbon as varied by topography and vegetation type in the Chinese Loess Plateau.CATENA,196,13.
MLA Wang, Baorong,et al."Effects of forest floor characteristics on soil labile carbon as varied by topography and vegetation type in the Chinese Loess Plateau".CATENA 196(2021):13.

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来源：地理科学与资源研究所

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