Effects of environmental factors on classification of loessderived soils and clay minerals variations, northern Iran

doi:10.1007/s11629-017-4796-y

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > Journal of Mountain Science > Journal of Mountain Science-2018 > Vol15 No.5

	Effects of environmental factors on classification of loessderived soils and clay minerals variations, northern Iran
	Ajami, M; Heidari, A; Khormali, F; Gorji, M; Ayoubi, S
刊名	JOURNAL OF MOUNTAIN SCIENCE
	2018
卷号	15 期号:5 页码:976-991
关键词	Soil classification Clay mineralogy Land-use change Topography Loess
ISSN号	1672-6316
DOI	10.1007/s11629-017-4796-y
文献子类	Article
英文摘要	Land-use type under different topographic conditions and human activities affects soil development. We investigated the effects of land-use, topography and human activity on soil classification changes in the Toshan watershed in northern Iran. Seven representative pedons derived from loess parent materials were studied on different land-uses and topographic positions. The studied pedons in forest (FO) on backslopes and footslope were classified as Calcic Haploxeralfs and Typic Haploxeralfs, respectively. The soils in abandoned lands (AB) and orchards (OR), where formerly under natural forests, located on the shoulder and backslopes positions were classified as Calcic Haploxeralfs and Vertic Haploxeralfs, respectively. Well-developed argillic horizons as indicators for higher degrees of soil evolution were observed in more-stable areas under the natural forest or less disturbed areas. Clay lessivage through these soil profiles have led to formation of Typic or Calcic Haploxeralfs, while under croplands (CP) were classified as Typic Calcixerepts. Conversion of sloping deforested areas to CP along with inappropriate management have accelerated soil erosion, resulting in unstable conditions in which decalcification and formation of developed soils cannot occur. Paddy cultivation in flat areas has caused to reduced conditions and formation of Typic Haplaquepts. Because of unfavorable conditions for chemical weathering (e.g. lower water retention compared to more-stable areas) no vermiculite was detected in the CP. The results showed that evolution and classification of the studied soils were strongly affected by land-use type, topography and management.
电子版国际标准刊号	1993-0321
语种	英语
WOS记录号	WOS:000431989800005
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/35522]
专题	Journal of Mountain Science_Journal of Mountain Science-2018_Vol15 No.5
推荐引用方式 GB/T 7714	Ajami, M,Heidari, A,Khormali, F,et al. Effects of environmental factors on classification of loessderived soils and clay minerals variations, northern Iran[J]. JOURNAL OF MOUNTAIN SCIENCE,2018,15(5):976-991.
APA	Ajami, M,Heidari, A,Khormali, F,Gorji, M,&Ayoubi, S.(2018).Effects of environmental factors on classification of loessderived soils and clay minerals variations, northern Iran.JOURNAL OF MOUNTAIN SCIENCE,15(5),976-991.
MLA	Ajami, M,et al."Effects of environmental factors on classification of loessderived soils and clay minerals variations, northern Iran".JOURNAL OF MOUNTAIN SCIENCE 15.5(2018):976-991.