干旱区生态环境知识资源中心(Arid): Comparison of organic carbon stock of Regosols under two different climates and land use in Tunisia

Arid

DOI	10.1007/s12517-020-06011-4
	Comparison of organic carbon stock of Regosols under two different climates and land use in Tunisia
	Znaidi, Ahlem; Brahim, Nadhem; Ibrahim, Hatem; Bol, Roland; Chaouachi, Maher
通讯作者	Brahim, N (corresponding author), Univ Tunis El Manar, Fac Sci Tunis, Tunis 2092, Tunisia.
会议名称	2nd Conference of the Arabian-Journal-of-Geosciences (CAJG)
会议日期	NOV 25-28, 2019
会议地点	Sousse, TUNISIA
英文摘要	Drylands are affected by desertification and by a serious process of degradation. Studying the properties of their soils and their carbon sequestration characteristics is a key step as a major contribution for their conservation to cope with the global warming issue. Considering the geographical position of Tunisia, most of its territory is in the dryland zone with a deficit in water balance, and half of its area is only occupied by Lithosols and Regosols. These soils and despite their existence in dry climates are either pastureland or agricultural land, they play a considerable role for the peasants; however, their organic carbon stocks remain little studied and not well known. The present work focuses on the state of the carbon stock in the Regosols of Tunisia. Two study sites were studied; the first was a Regosol in Gafsa under arid climate, the second, another Regosol in Kairouan under semiarid climate. In these two sites, we also have two different modes of land use. In fact, in each site, we have a plot in an olive grove adjacent to another in a pastoral mode. Results showed that soil particle size, pH, and bulk density were very close. The difference was observed in the content of organic carbon and therefore in organic carbon stock. In olive groves, the organic carbon stocks of the soil, 1-m deep, were 8.22 (+/- 0.72) Kg.C.m(-2) in Gafsa and 12 (+/- 0.46) Kg.C.m(-2) in Kairouan. This increase mainly concerned the surface layers (0-20 cm) and the deepest layers (80-100 cm). By comparing the carbon stocks of soils under olive groves with those under pasture, the gain in 15 years varied between 1.48 and 2.46 Kg.C.m(-2). These results prove the low organic matter content of Regosols from North Africa, but on the other hand, their great capacity to sequester organic carbon. These same soils, if organically amended, could be fertile and productive soils, but also, could act as a carbon sink to cope with global warming.
英文关键词	Dryland Regosol Soil organic carbon Land-use change Carbon pools Tunisia
来源出版物	ARABIAN JOURNAL OF GEOSCIENCES
ISSN	1866-7511
EISSN	1866-7538
出版年	2020
卷号	13
期号	19
出版者	SPRINGER HEIDELBERG
类型	Article; Proceedings Paper
语种	英语
收录类别	CPCI-S
WOS记录号	WOS:000574573400008
WOS关键词	SOIL ; MANAGEMENT ; EMISSIONS ; NITROGEN
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
资源类型	会议论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/337076
作者单位	[Znaidi, Ahlem; Chaouachi, Maher] Univ Monastir, Inst Super Biotechnol Monastir, Ave Taher Haddad,BP 74, Monastir 5000, Tunisia; [Brahim, Nadhem] Univ Tunis El Manar, Fac Sci Tunis, Tunis 2092, Tunisia; [Ibrahim, Hatem] Univ Carthage, Fac Sci Bizerte, Jarzouna 7021, Tunisia; [Bol, Roland] Juelich Res Ctr, Inst Biogeosci, Agrosphere Inst IBG 3, D-52428 Julich, Germany; [Bol, Roland] Bangor Univ, Environm Ctr Wales, Sch Nat Sci, Deiniol Rd, Bangor LL57 2UW, Gwynedd, Wales
推荐引用方式 GB/T 7714	Znaidi, Ahlem,Brahim, Nadhem,Ibrahim, Hatem,et al. Comparison of organic carbon stock of Regosols under two different climates and land use in Tunisia[C]:SPRINGER HEIDELBERG,2020.