干旱区生态环境知识资源中心(Arid): Spectroscopic and chromatographic investigation of soil organic matter composition for different agrosystems from arid saline soils from Southeastern Tunisia

Arid

DOI	10.1007/s12517-020-05569-3
	Spectroscopic and chromatographic investigation of soil organic matter composition for different agrosystems from arid saline soils from Southeastern Tunisia
	Omar, Zohra 1; Bouajila, Abdelhakim 1; Bouajila, Jalloul 2; Rahmani, Rami 3; Besser, Houda 1,4; Hamed, Younes 1,4
通讯作者	Omar, Zohra
来源期刊	ARABIAN JOURNAL OF GEOSCIENCES
ISSN	1866-7511
EISSN	1866-7538
出版年	2020
卷号	13 期号:13
英文摘要	In Tunisia, several studies estimated the soil organic matter (SOM) stocks. However, little is known about SOM composition and dynamics especially in arid regions. Globally, arid soils of Tunisia are saline. This study aims to investigate the composition and stability of SOM in salt-affected soils under different vegetation covers in Southeastern Tunisia. Two depths are sampled in ten profiles from different localities. SOM composition was assessed by FTIR spectroscopy and gas chromatography-mass spectrometry (GC/MS). The results showed that, despite the differences of studied soils, SOM contents are low (< 20 g/kg) and decrease with soil depth. The lowest content of SOM is attributed to native soils which suggest that SOM in arid saline soils is mainly controlled by available litter input. FTIR spectroscopy revealed that SOM is predominated by polysaccharides, aliphatic C, and aromatic C. Polysaccharides and aliphatic C increased with soil depth for agricultural and native soils. However, aromatic C increased with soil depth for agricultural soils, while it decreased for native soils. Agricultural soils are enriched in aliphatic C and polysaccharides compared with native soils that had higher content of aromatic C. Thus, the chemical composition of SOM in arid saline soils is strongly influenced by litter input quality and decomposition rate of SOM. GC/MS analyses which showed the predominance of mid-chain n-alkanes confirm those finding. Because of their relative recalcitrance and/or their protection by association with soil minerals, polysaccharides, mid-chain n-alkanes, aliphatic C, and aromatic C may have crucial effect on SOM stabilization in arid saline soils.
英文关键词	Soil organic matter FTIR GC MS Salinity Arid soils Tunisia
类型	Article
语种	英语
国家	Tunisia ; France
收录类别	SCI-E
WOS记录号	WOS:000541421900001
WOS关键词	FT-IR SPECTROSCOPY ; CARBON SEQUESTRATION ; CHEMICAL-COMPOSITION ; MOLECULAR-STRUCTURE ; HUMIC SUBSTANCES ; CLIMATE-CHANGE ; COVER CROP ; LAND-USE ; FOREST ; MANAGEMENT
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/319407
作者单位	1.Univ Gabes, Fac Sci Gabes, Res Unit Geosyst Georessources & Geoenvironm 3G, Gabes 6072, Tunisia; 2.Univ Paul Sabatier, Univ Toulouse, Fac Pharm Toulouse, Lab IMRCP UMR CNRS 5623, 118 Route Narbonne, F-31062 Toulouse, France; 3.Univ Gabes, High Inst Appl Biol Med, Res Unit Valorizat Act Biomol, Gabes, Tunisia; 4.Int Assoc Water Resources Southern Mediterranean, Gafsa, Tunisia
推荐引用方式 GB/T 7714	Omar, Zohra,Bouajila, Abdelhakim,Bouajila, Jalloul,et al. Spectroscopic and chromatographic investigation of soil organic matter composition for different agrosystems from arid saline soils from Southeastern Tunisia[J],2020,13(13).
APA	Omar, Zohra,Bouajila, Abdelhakim,Bouajila, Jalloul,Rahmani, Rami,Besser, Houda,&Hamed, Younes.(2020).Spectroscopic and chromatographic investigation of soil organic matter composition for different agrosystems from arid saline soils from Southeastern Tunisia.ARABIAN JOURNAL OF GEOSCIENCES,13(13).
MLA	Omar, Zohra,et al."Spectroscopic and chromatographic investigation of soil organic matter composition for different agrosystems from arid saline soils from Southeastern Tunisia".ARABIAN JOURNAL OF GEOSCIENCES 13.13(2020).