干旱区生态环境知识资源中心(Arid): Effects of Temporal Variation in Long-Term Cultivation on Organic Carbon Sequestration in Calcareous Soils: Nile Delta, Egypt

Arid

DOI	10.3390/su12114514
	Effects of Temporal Variation in Long-Term Cultivation on Organic Carbon Sequestration in Calcareous Soils: Nile Delta, Egypt
	Alnaimy, Manal 1; Zelenakova, Martina 2; Vranayova, Zuzana 3; Abu-Hashim, Mohamed 1
通讯作者	Zelenakova, Martina
来源期刊	SUSTAINABILITY
EISSN	2071-1050
出版年	2020
卷号	12 期号:11
英文摘要	Soil carbon sequestration is a riskier long-term strategy for climate mitigation than direct emissions reduction, but it plays a main role in closing carbon emission gaps. Effects of long-term cultivation on soil carbon sequestration were studied at the western edge of the Nile Delta near Alexandria, Egypt. Seven agricultural fields of different ages (0-50 years in use) were selected and compared with the surrounding desert (virgin soil) and desert shrub-land. Samples were taken at three horizons, 0-30, 30-60, and 60-90 cm, and tested for differences in physical and chemical properties. The results of long-term cultivation reveal that the European Commission (EC) value was 11.77 dS/m in virgin soil, while the EC values decreased to 5.82, 4.23, 3.74, 2.40, and 2.26 dS/m after 5, 10, 20, 30, and 50 years of cultivation, respectively. The calcareous rock fraction smaller than 50 mu m in size revealed another phenomenon, where active calcium carbonate content increased with cultivation practices from 1.15% (virgin soil) to 5.42%, 6.47%, 8.38%, and 10.13% after 5, 10, 20, and 30 years of cultivation, respectively, while shrub-land also showed a low amount of active CaCO3 with 1.38%. In fifty years of cultivation, soil bulk density decreased significantly from 1.67 to 1.11 g/cm(3), and it decreased to 1.65, 1.44, 1.40, and 1.25 g/cm(3) after 5, 10, 20, and 30 years, respectively. These results reveal that the increase in soil carbon stock in the upper 90 cm amounted to 41.02 t C/ha after five years of cultivation, compared to virgin soil with 13.47 t C/ha. Soil carbon levels increased steeply during the five years of cultivation, with an average rate of 8.20 t C/ha per year in the upper 90 cm. After the first five years of cultivation, the carbon sequestration rate slowed, reaching 4.68, 3.77, 2.58, and 1.93 t C/ha per year after 10, 20, 30, and 50 years, respectively, resulting in sequestration-potential values of 46.78, 75.63, 77.43, and 96.45 t C/ha. These results indicate that potential soil carbon sequestration resembles a logarithmic curve until the equilibrium state between carbon application and decomposition by microorganisms is reached.
英文关键词	cultivation age soil organic carbon climate mitigation carbon sequestration
类型	Article
语种	英语
国家	Egypt ; Slovakia
开放获取类型	gold
收录类别	SCI-E ; SSCI
WOS记录号	WOS:000543391800177
WOS关键词	LAND-USE ; INORGANIC CARBON ; C SEQUESTRATION ; TILLAGE ; POOL ; CO2
WOS类目	Green & Sustainable Science & Technology ; Environmental Sciences ; Environmental Studies
WOS研究方向	Science & Technology - Other Topics ; Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/319811
作者单位	1.Zagazig Univ, Dept Soil Sci, Fac Agr, Zagazig 44511, Egypt; 2.Tech Univ Kosice, Dept Environm Engn, Fac Civil Engn, Kosice 04200, Slovakia; 3.Tech Univ Kosice, Dept Bldg Facil, Fac Civil Engn, Kosice 04200, Slovakia
推荐引用方式 GB/T 7714	Alnaimy, Manal,Zelenakova, Martina,Vranayova, Zuzana,et al. Effects of Temporal Variation in Long-Term Cultivation on Organic Carbon Sequestration in Calcareous Soils: Nile Delta, Egypt[J],2020,12(11).
APA	Alnaimy, Manal,Zelenakova, Martina,Vranayova, Zuzana,&Abu-Hashim, Mohamed.(2020).Effects of Temporal Variation in Long-Term Cultivation on Organic Carbon Sequestration in Calcareous Soils: Nile Delta, Egypt.SUSTAINABILITY,12(11).
MLA	Alnaimy, Manal,et al."Effects of Temporal Variation in Long-Term Cultivation on Organic Carbon Sequestration in Calcareous Soils: Nile Delta, Egypt".SUSTAINABILITY 12.11(2020).