干旱区生态环境知识资源中心(Arid): Chemical weathering in semi-arid soils of the Russian plain

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DOI	10.1016/j.catena.2021.105554
	Chemical weathering in semi-arid soils of the Russian plain
	Kalinin, P., I; Kudrevatykh, I. Yu; Malyshev, V. V.; Pilguy, L. S.; Buhonov, A., V; Mitenko, G., V; Alekseev, A. O.
通讯作者	Kalinin, PI (corresponding author), Russian Acad Sci, Inst Physicochem & Biol Problems Soil Sci, Inst Skaya St,Bldg 2, Pushchino 142290, Russia.
来源期刊	CATENA
ISSN	0341-8162
EISSN	1872-6887
出版年	2021
卷号	206
英文摘要	A 700 km long soil transect in the southern Russian plain was studied. The difference in the average annual precipitation within the transect was 240 mm/year, and the average annual temperature was 3 degrees C. The objective of this study was to understand the behaviour of chemical elements and features of chemical weathering in semiarid soils that developed on loesses and loess-like sediments. It was found that the semi-arid soils of the Russian plain are characterized by a low intensity of present chemical weathering. In an alkaline environment with a low amount of precipitation, the rate and direction of silicate weathering are determined not by the climate, but by the geochemical environment of the soil formation, which had already taken shape by the beginning of the Holocene. The alkaline oxidative environment hinders the hydrolysis and prevents the migration of chemical elements in ionic form. As a result, the removal of chemical elements from primary silicate minerals to soil solutions is not a determining process for vertical geochemical migration. The degree of weathering of present soils is mostly inherited from the parent materials of the Quaternary. Conditions for acid hydrolysis occur only in the upper horizons during increased biochemical activity and lower pH values. However, soil processes (carbonatization, salinization, illitization, and loessivage) make the behaviour of alkali (Na2O, K2O) and alkalineearth (MgO, CaO, Sr) metals more complex, involving them in recycling in the upper soil horizons, and hinder the quantitative characterization of weathering of silicate minerals. Therefore, the use of CIA geochemical indicator as a quantitative measure of chemical weathering for semiarid soils formed in the Holocene becomes problematic. This study will improve the understanding of the geochemical processes that took place in modern soils in semi-arid regions and clarify the possibility of using geochemical weathering ratios in saline sediments.
英文关键词	Semiarid soils Geochemistry Russian plain Loess Weathering Weathering rates Climate Hydrolysis Loessification
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000688449100061
WOS关键词	VOLGA REGION ; LOESS ; CLIMATE ; STEPPE ; INDEX ; PALEOSOLS ; KURGANS ; CHINA ; SOUTH ; PALEOCLIMATE
WOS类目	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS研究方向	Geology ; Agriculture ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/362793
作者单位	[Kalinin, P., I; Kudrevatykh, I. Yu; Malyshev, V. V.; Pilguy, L. S.; Buhonov, A., V; Mitenko, G., V; Alekseev, A. O.] Russian Acad Sci, Inst Physicochem & Biol Problems Soil Sci, Inst Skaya St,Bldg 2, Pushchino 142290, Russia
推荐引用方式 GB/T 7714	Kalinin, P., I,Kudrevatykh, I. Yu,Malyshev, V. V.,et al. Chemical weathering in semi-arid soils of the Russian plain[J],2021,206.
APA	Kalinin, P., I.,Kudrevatykh, I. Yu.,Malyshev, V. V..,Pilguy, L. S..,Buhonov, A., V.,...&Alekseev, A. O..(2021).Chemical weathering in semi-arid soils of the Russian plain.CATENA,206.
MLA	Kalinin, P., I,et al."Chemical weathering in semi-arid soils of the Russian plain".CATENA 206(2021).