干旱区生态环境知识资源中心(Arid): Soil aggregation, aggregate-associated organic carbon, and total nitrogen under different land use in Regosols of coastal arid lands in Gabes, Tunisia

Arid

DOI	10.1007/s12517-021-08289-4
	Soil aggregation, aggregate-associated organic carbon, and total nitrogen under different land use in Regosols of coastal arid lands in Gabes, Tunisia
	Bouajila, Abdelhakim; Omar, Zohra; Magherbi, Ghalya
通讯作者	Bouajila, A (corresponding author), Univ Gabes, Fac Sci Gabes, Cite Erriadh Zrig 6072, Gabes, Tunisia.
来源期刊	ARABIAN JOURNAL OF GEOSCIENCES
ISSN	1866-7511
EISSN	1866-7538
出版年	2021
卷号	14 期号:18
英文摘要	This study investigates soil aggregate distribution, soil organic carbon (SOC), and total nitrogen (TN) concentrations in total soil and within aggregates under different land uses in Regosols of Ghannouch, southern arid region of Tunisia. From three sites, i.e., native soils (NS), olive-growing soil (OG), and seasonal-crop soil (SC) land use, four depths were sampled (0-10, 10-20, 20-40, and >40 cm) and separated into three aggregate-size classes (macroaggregates >0.250mm; microaggregates 0.250-0.050 mm; and <0.050 mm size class). The SOC and TN concentrations in total soil were higher and decreased with depth in SC and in OG than in NS land use. The three land uses showed that microaggregates constituted the major proportion (65-92%) across depths. Macroaggregate amounts were 4 to 5 times higher in NS than in SC and OG. The SOC and TN tend to be concentrated in macroaggregates and in <0.050mm size class in OG and SC soils. Nevertheless in NS, SOC and TN concentrations were higher in <0.050-mm size class. The increase of SOC and TN within aggregates is the result of the increase of SOC in total soil. We observed that cultivation enhances SOC and TN of Regosols, but it decreases their physical protection within macroaggregates. Moreover, higher positive correlation was found between SOC in total soil and SOC in macroaggregates (r=0.81). More studies about the distribution of SOC and TN in soil aggregates are required in arid soils to improve their fertility and to enhance their function as a sink of greenhouse gases.
英文关键词	Organic carbon Nitrogen Aggregation Regosols Tunisia
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000692411400002
WOS关键词	DIFFERENT TILLAGE SYSTEMS ; LONG-TERM APPLICATION ; NO-TILLAGE ; MICROBIAL BIOMASS ; MATTER DYNAMICS ; SEQUESTRATION ; STABILITY ; IMPACT ; STABILIZATION ; MECHANISMS
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/2XILL650/362567
作者单位	[Bouajila, Abdelhakim; Omar, Zohra; Magherbi, Ghalya] Univ Gabes, Fac Sci Gabes, Cite Erriadh Zrig 6072, Gabes, Tunisia
推荐引用方式 GB/T 7714	Bouajila, Abdelhakim,Omar, Zohra,Magherbi, Ghalya. Soil aggregation, aggregate-associated organic carbon, and total nitrogen under different land use in Regosols of coastal arid lands in Gabes, Tunisia[J],2021,14(18).
APA	Bouajila, Abdelhakim,Omar, Zohra,&Magherbi, Ghalya.(2021).Soil aggregation, aggregate-associated organic carbon, and total nitrogen under different land use in Regosols of coastal arid lands in Gabes, Tunisia.ARABIAN JOURNAL OF GEOSCIENCES,14(18).
MLA	Bouajila, Abdelhakim,et al."Soil aggregation, aggregate-associated organic carbon, and total nitrogen under different land use in Regosols of coastal arid lands in Gabes, Tunisia".ARABIAN JOURNAL OF GEOSCIENCES 14.18(2021).