干旱区生态环境知识资源中心(Arid): Modeling the effects of farming management practices on soil organic carbon stock under two tillage practices in a semi-arid region, Morocco

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DOI	10.1016/j.heliyon.2020.e05889
	Modeling the effects of farming management practices on soil organic carbon stock under two tillage practices in a semi-arid region, Morocco
	Lembaid, Ibtissame; Moussadek, Rachid; Mrabet, Rachid; Douaik, Ahmed; Bouhaouss, Ahmed
通讯作者	Lembaid, I (corresponding author), Mohammed V Univ, Fac Sci, Rabat, Morocco. ; Lembaid, I (corresponding author), Natl Inst Agr Res Rabat INRA, Rabat, Morocco.
来源期刊	HELIYON
EISSN	2405-8440
出版年	2021
卷号	7 期号:1
英文摘要	Farming management practices are of paramount importance for soil organic carbon (SOC) sequestration in carbon (C) cycling at different scales. However, due to a lack of proper methodologies, estimating the impacts of different soil management practices on overall SOC stock remains inadequately quantified. In this paper, a process-based model, Denitrification-Decomposition (DNDC), was validated on midterm (9 years) and employed depending on the local climate, soil and management conditions, to assess the impacts of alternative management practices on SOC stock under two tillage systems, in a semi-arid region of Morocco. Validated results showed a good agreement between model simulated and observed values, based on the normalized root mean square error (RMSE) and Pearson correlation coefficient (r). This agreement indicates that the DNDC model could capture patterns and magnitudes changes across the climate zone, soil type, and management practices. Modeled results pointed out that, under no-tillage practice (NT), the SOC content increased by 30% compared to conventional tillage (CT). During the simulated period (9 years), the SOC sequestration potential (CSP) has been greatly improved with increased crop residue rate and application of farmyard manure (FY-manure). This increase ranged from 415 kg C/ha to 1787 kg C/ha under NT practice, and from 150 kg C/ha to 818 kg C/ha under CT system. In contrast, increasing fertilizer rate had low to negligible effect on SOC stock. On the other hand, CSP declined by 107-335 kg C/ha and by 177-354 kg C/ha under NT and CT practices respectively, when decreasing N-fertilizer rates. In light of these results, an increase in crop residue rate returned at surface after harvest and application of organic fertilizer, especially under NT practice, can substantially improve SOC stock in a semi-arid region.
英文关键词	Soil organic carbon DNDC model Farming management practices No-tillage system Climate change
类型	Article
语种	英语
开放获取类型	gold, Green Published
收录类别	SCI-E
WOS记录号	WOS:000618043400016
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/352831
作者单位	[Lembaid, Ibtissame; Bouhaouss, Ahmed] Mohammed V Univ, Fac Sci, Rabat, Morocco; [Lembaid, Ibtissame; Moussadek, Rachid; Mrabet, Rachid; Douaik, Ahmed] Natl Inst Agr Res Rabat INRA, Rabat, Morocco
推荐引用方式 GB/T 7714	Lembaid, Ibtissame,Moussadek, Rachid,Mrabet, Rachid,et al. Modeling the effects of farming management practices on soil organic carbon stock under two tillage practices in a semi-arid region, Morocco[J],2021,7(1).
APA	Lembaid, Ibtissame,Moussadek, Rachid,Mrabet, Rachid,Douaik, Ahmed,&Bouhaouss, Ahmed.(2021).Modeling the effects of farming management practices on soil organic carbon stock under two tillage practices in a semi-arid region, Morocco.HELIYON,7(1).
MLA	Lembaid, Ibtissame,et al."Modeling the effects of farming management practices on soil organic carbon stock under two tillage practices in a semi-arid region, Morocco".HELIYON 7.1(2021).