干旱区生态环境知识资源中心(Arid): Effects of land-use/cover change on soil hydraulic properties and pore characteristics in a semi-arid region of central Iran

Arid

DOI	10.1016/j.still.2019.104478
	Effects of land-use/cover change on soil hydraulic properties and pore characteristics in a semi-arid region of central Iran
	Kabir, Eftekhar Baranian 1; Bashari, Hossein 1; Bassiri, Mehdi 1; Mosaddeghi, Mohammad Reza 2
通讯作者	Kabir, Eftekhar Baranian
来源期刊	SOIL & TILLAGE RESEARCH
ISSN	0167-1987
EISSN	1879-3444
出版年	2020
卷号	197
英文摘要	The semi-arid regions of central Iran have vastly undergone the manipulation and conversion of rangelands to dry farmlands. Soil hydraulic properties and pore characteristics may differ in various land-use/cover types. This study evaluated the effects of good and poor rangeland, dry farmland and abandoned farmland on the soil hydraulic properties and pore characteristics in a semi-arid region of central Iran. A completely randomized design was used to analyze the effects of land-use/cover on soil hydraulic properties and pore characteristics. Water infiltration into the soil at inlet matric suction (h) values of 2, 5, 10 and 15 cm was measured using a tension infiltrometer in different land-use/cover types with 18 replications. Wooding's analytical method was used to model the infiltration data and the best-fit values for Gardner's parameters of macroscopic capillary length (lambda(c)) and saturated hydraulic conductivity (K-s) were estimated. Pore characteristics were also estimated using the Watson and Luxmoore method. The results indicated that saturated and near-saturated hydraulic conductivity values [K-h] and lambda(c) were significantly influenced by the land-use/cover type. For h < 5 cm, good rangeland and dry farmland had the highest and lowest means of hydraulic conductivity, steady-state flux and sorptivity, respectively. The K values at h lower than 5 cm were found to be as follows: good rangeland > poor rangeland > abandoned farmland > dry farmland. Good rangeland had a greater number of large pore-size class (i.e., > 0.06 cm) and total porosity. Dry farmland and good rangeland had the lowest and highest proportions of large pore-size class (> 0.06 cm), respectively. Inappropriate management practices such as over-grazing of poor rangeland, cultivation and harvesting machinery stress and soil organic carbon decomposition in the dry farmland decreased the frequency of very large pore-size classes (i.e., > 0.15 cm). Although very large and large pores contributed to less than 1% of the soil volume, more than 50% of the total water flow would happen through these pore-size classes. Preserving rangelands in good condition can maintain soil structure and stability and would enhance water infiltration into the soil. These findings can be used by decision makers and land managers for holistic management in ecosystems of semi-arid areas.
英文关键词	Tension infiltrometer Rangeland Wooding's analytical method Saturated hydraulic conductivity Macroscopic capillary length Sorptivity
类型	Article
语种	英语
国家	Iran
收录类别	SCI-E
WOS记录号	WOS:000514003800004
WOS关键词	LONG-TERM TILLAGE ; CONVENTIONAL AVAILABLE WATER ; ORGANIC-MATTER ; TEMPORAL VARIABILITY ; CONSERVATION TILLAGE ; SPATIAL VARIABILITY ; PHYSICAL-PROPERTIES ; BULK-DENSITY ; CONDUCTIVITY ; INFILTRATION
WOS类目	Soil Science
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/2XILL650/315575
作者单位	1.Isfahan Univ Technol, Dept Nat Resources, Esfahan 8415683111, Iran; 2.Isfahan Univ Technol, Coll Agr, Dept Soil Sci, Esfahan 8415683111, Iran
推荐引用方式 GB/T 7714	Kabir, Eftekhar Baranian,Bashari, Hossein,Bassiri, Mehdi,et al. Effects of land-use/cover change on soil hydraulic properties and pore characteristics in a semi-arid region of central Iran[J],2020,197.
APA	Kabir, Eftekhar Baranian,Bashari, Hossein,Bassiri, Mehdi,&Mosaddeghi, Mohammad Reza.(2020).Effects of land-use/cover change on soil hydraulic properties and pore characteristics in a semi-arid region of central Iran.SOIL & TILLAGE RESEARCH,197.
MLA	Kabir, Eftekhar Baranian,et al."Effects of land-use/cover change on soil hydraulic properties and pore characteristics in a semi-arid region of central Iran".SOIL & TILLAGE RESEARCH 197(2020).