干旱区生态环境知识资源中心(Arid): Evolving characteristics of dissolved organic matter in soil profiles during 56 years of revegetation in Mu Us Sandy Land

Arid

DOI	10.1007/s11104-023-06414-8
	Evolving characteristics of dissolved organic matter in soil profiles during 56 years of revegetation in Mu Us Sandy Land
	Wang, Yixiang; Hu, Hanzhe; Zhou, Yajie; Zhang, Buran; Li, Shuo; Liu, Jun; Tong, Xiaogang
通讯作者	Tong, XG
来源期刊	PLANT AND SOIL
ISSN	0032-079X
EISSN	1573-5036
出版年	2024
卷号	497 期号:1-2 页码:567-584
英文摘要	Background and aimsDissolved organic matter (DOM) is a vital bioactive component in soil nutrient cycling. However, the dynamics of its characteristics and composition along the soil profile during desertification reversal are poorly understood.MethodsSoil samples were gathered from shrub and arbor forests that have been established for 25, 35, 46, and 56 years on semifixed sand of Mu Us Sandy Land. The evolution of DOM composition and chemical properties were explored by ultraviolet-visible and fluorescence spectrophotometry.ResultsAfter 56 revegetation years, DOM increased significantly. In arbor lands, DOM was impacted mainly by dissolved organic carbon, with mean concentrations increasing from 58.89 mg center dot kg-1 to 131.95 mg center dot kg-1 in 0-100 cm soil profile. In the shrubland, changes in dissolved organic nitrogen were more remarkable, with mean concentrations increasing from 3.43 mg center dot kg-1 to 6.82 mg center dot kg-1 in 0-100 cm soil profile. Concurrently, as soil depth increased, noticeably decreased in the proportion of humic-like components within DOM, while protein-like components displayed an upward trend. The chemical properties of DOM in arbor lands display a higher proportion of hydrophobic substances along with an elevated aromaticity and humification degree. Conversely, in shrubland, the DOM composition exhibits a higher proportion of tryptophan components that are more available for microbial metabolism. Correlation analysis showed that DOM content and specific environmental factors (including soil depth, vegetation type, and afforestation age) profoundly affected soil DOM properties.ConclusionsThe DOM in arbor land and surface soil layer were more humified and relatively stable. Conversely, the DOM in shrubland and deeper soil layers contains more bioactive substances for microbial utilization.
英文关键词	Dissolved organic matter Soil profile EEM-PARAFAC Vegetation restoration Mu Us Sandy Land
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:001111261100001
WOS关键词	PLANT LITTER DECOMPOSITION ; MICROBIAL COMMUNITY ; MOLECULAR-WEIGHT ; FOLIAR LITTER ; CARBON ; NITROGEN ; FLUORESCENCE ; DYNAMICS ; CLIMATE ; DEGRADABILITY
WOS类目	Agronomy ; Plant Sciences ; Soil Science
WOS研究方向	Agriculture ; Plant Sciences
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/405083
推荐引用方式 GB/T 7714	Wang, Yixiang,Hu, Hanzhe,Zhou, Yajie,et al. Evolving characteristics of dissolved organic matter in soil profiles during 56 years of revegetation in Mu Us Sandy Land[J],2024,497(1-2):567-584.
APA	Wang, Yixiang.,Hu, Hanzhe.,Zhou, Yajie.,Zhang, Buran.,Li, Shuo.,...&Tong, Xiaogang.(2024).Evolving characteristics of dissolved organic matter in soil profiles during 56 years of revegetation in Mu Us Sandy Land.PLANT AND SOIL,497(1-2),567-584.
MLA	Wang, Yixiang,et al."Evolving characteristics of dissolved organic matter in soil profiles during 56 years of revegetation in Mu Us Sandy Land".PLANT AND SOIL 497.1-2(2024):567-584.