干旱区生态环境知识资源中心(Arid): Spectral responses to labile organic carbon fractions as useful soil quality indicators across a climatic gradient

Arid

DOI	10.1016/j.ecolind.2019.106042
	Spectral responses to labile organic carbon fractions as useful soil quality indicators across a climatic gradient
	Ramirez, Paulina B.1; Calderon, Francisco J.2; Fonte, Steven J.3; Santibanez, Fernando 4; Bonilla, Carlos A.1,5
通讯作者	Bonilla, Carlos A.
来源期刊	ECOLOGICAL INDICATORS
ISSN	1470-160X
EISSN	1872-7034
出版年	2020
卷号	111
英文摘要	Light fraction (LF) and permanganate-oxidizable C (PDXC) demonstrate high reliability as indicators for monitoring soil functioning in response to changes in soil organic carbon (SOC). However, mechanisms affecting the amount and composition of labile fractions and their relationship with SOC content at regional scales have not been thoroughly studied. The aim of this study was to examine the spectral features associated with these labile organic matter fractions in samples collected from 75 sites under different soil types, land use and climatic conditions in Chile. Topsoil was analyzed for total C and N content, aggregate stability, and texture. Additionally, the spectral properties of LF material and whole soils were analyzed using diffuse reflectance mid-infrared spectroscopy (MidIR). Our results show that LF shared a similar spectral composition but with different band intensities across climatic regimes. LF spectra were associated with O-alkyl C in cool and rainy areas, whereas a relative accumulation of aromatic structures was found in warmer areas. Whole soils spectra showed that SOC, PDXC and aggregability were related to the prevalence of aliphatic and polysaccharides compounds in colder areas. While in warm arid areas, the stabilization of aliphatic compounds was found to be related to clay minerals. Furthermore, we found that PDXC and SOC content were closely related and changes in PDXC were affected by variations in climate conditions. The understanding of spectral features linked to labile SOC fractions on at larger geographical scale will contribute to the development of sustainable land management options for the prevention of land degradation in the context of adaptation to climate change.
英文关键词	Alkyl C Chile Infrared spectroscopy light fraction (LF) permanganate oxidizable carbon (PDXC) Soil carbon
类型	Article
语种	英语
国家	Chile ; USA
开放获取类型	Bronze
收录类别	SCI-E
WOS记录号	WOS:000512603300078
WOS关键词	PERMANGANATE-OXIDIZABLE CARBON ; MATTER FRACTIONS ; REFLECTANCE SPECTROSCOPY ; RAINFALL EROSIVITY ; AGRICULTURAL SOILS ; LAND-USE ; MANAGEMENT ; TILLAGE ; SEQUESTRATION ; STABILIZATION
WOS类目	Biodiversity Conservation ; Environmental Sciences
WOS研究方向	Biodiversity & Conservation ; Environmental Sciences & Ecology
来源机构	Colorado State University
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/314358
作者单位	1.Pontificia Univ Catolica Chile, Dept Ingn Hidraul & Ambiental, Ave Vicuna Mackenna 4860, Santiago 7820436, Chile; 2.USDA ARS, Cent Great Plains Res Stn, Akron, CO 80720 USA; 3.Colorado State Univ, Dept Soil & Crop Sci, Ft Collins, CO 80523 USA; 4.Univ Chile, Dept Ingn & Suelos, Casilla 1004, Santiago, Chile; 5.Ctr Desarrollo Urbano Sustentable CONICYT FONDAP, El Comendador 1916, Santiago 7520245, Chile
推荐引用方式 GB/T 7714	Ramirez, Paulina B.,Calderon, Francisco J.,Fonte, Steven J.,et al. Spectral responses to labile organic carbon fractions as useful soil quality indicators across a climatic gradient[J]. Colorado State University,2020,111.
APA	Ramirez, Paulina B.,Calderon, Francisco J.,Fonte, Steven J.,Santibanez, Fernando,&Bonilla, Carlos A..(2020).Spectral responses to labile organic carbon fractions as useful soil quality indicators across a climatic gradient.ECOLOGICAL INDICATORS,111.
MLA	Ramirez, Paulina B.,et al."Spectral responses to labile organic carbon fractions as useful soil quality indicators across a climatic gradient".ECOLOGICAL INDICATORS 111(2020).