干旱区生态环境知识资源中心(Arid): Impacts of soil organic carbon and tillage systems on structural stability as quantified by the high energy moisture characteristic (HEMC) method

Arid

DOI	10.31545/intagr/145805
	Impacts of soil organic carbon and tillage systems on structural stability as quantified by the high energy moisture characteristic (HEMC) method
	Farahani, Elham; Emami, Hojat; Keshavarz, Peyman
通讯作者	Emami, H (corresponding author)，Ferdowsi Univ Mashhad, Dept Soil Sci, Mashhad 9177948974, Razavi Khorasan, Iran.
来源期刊	INTERNATIONAL AGROPHYSICS
ISSN	0236-8722
EISSN	2300-8725
出版年	2022
卷号	36 期号:1 页码:13-26
英文摘要	The impact of different tillage systems on the structural stability of the soil as quantified by high energy moisture characteristics has not been studied to date in the semi-arid region of northeastern Iran. Therefore, in this research, the effects of conventional, reduced, and no-tillage treatments under wheat-corn crop rotation on the organic carbon content, soil organic carbon stocks and microbial biomass carbon and also the aggregate stability of a clay loam soil (Aridisol, in USDA soil classification) were evaluated in northeastern Iran. Measurements were made at two depths (0-15 and 15-30 cm) three years after the establishment of experiment. Aggregate stability was determined using the high energy moisture characteristics, mean weight diameter and the percentage of water-stable aggregates. The high energy moisture characteristics stability indices (i.e. structural index, volume of drainable pores, and slope at the inflection point of high energy moisture characteristics) were higher for the slow (on average 0.053 hPa-1, 0.4 g g(-1), and 0.022 hPa(-1) for structural index, volume of drainable pores and slope at the inflection point, respectively) than the fast wetting rate (on average 0.014 hPa(-1), 0.2 g g(-1), and 0.012 hPa(-1) for structural index, volume of drainable pores and slope at the inflection point, respectively). The modal suction was higher for the fast (18.61 hPa in average) than for the slow wetting rate (7.63 hPa in average). Organic carbon, soil organic carbon stocks and microbial biomass carbon were higher for no-tillage as compared with the reduced and conventional treatments, due to the use of a cover crop (clover) and because crop residues were retained in this system. The treatments contained greater organic carbon, soil organic carbon stocks and microbial biomass carbon (no-tillage at both depths and reduced at a depth of 0-15 cm) showed mainly high stability ratios and indices, regardless of the wetting rate. The values of modal suction were lower in the treatments which contained greater organic carbon, soil organic carbon stocks, and microbial biomass carbon, which results in a stable soil structure. The no-tillage system, which produced the maximum organic carbon and soil organic carbon stock among the tillage systems, showed the highest amounts of mean weight diameter (0.15 mm), and water-stable aggregates (92%). Our findings revealed that the high energy moisture characteristics method was highly sensitive to macroaggregate stability in water.
英文关键词	aggregate slaking microbial activity soil management structural stability Aridisols
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000754733700002
WOS关键词	AGGREGATE STABILITY ; MICROBIAL BIOMASS ; MATTER ; QUALITY ; SEQUESTRATION ; ROTATION ; COMPOST ; DENSITY ; ACID
WOS类目	Agronomy
WOS研究方向	Agriculture
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/376674
作者单位	[Farahani, Elham; Emami, Hojat] Ferdowsi Univ Mashhad, Dept Soil Sci, Mashhad 9177948974, Razavi Khorasan, Iran; [Keshavarz, Peyman] Agr & Nat Resources Ctr, Soil & Water Res Dept, Mashhad 9165966416, Razavi Khorasan, Iran
推荐引用方式 GB/T 7714	Farahani, Elham,Emami, Hojat,Keshavarz, Peyman. Impacts of soil organic carbon and tillage systems on structural stability as quantified by the high energy moisture characteristic (HEMC) method[J],2022,36(1):13-26.
APA	Farahani, Elham,Emami, Hojat,&Keshavarz, Peyman.(2022).Impacts of soil organic carbon and tillage systems on structural stability as quantified by the high energy moisture characteristic (HEMC) method.INTERNATIONAL AGROPHYSICS,36(1),13-26.
MLA	Farahani, Elham,et al."Impacts of soil organic carbon and tillage systems on structural stability as quantified by the high energy moisture characteristic (HEMC) method".INTERNATIONAL AGROPHYSICS 36.1(2022):13-26.