Arid
DOI10.1590/S0100-06832013000300001
ORIGIN OF SANDSTONES FROM THE GUARA FORMATION AND THEIR PEDOLOGIC COVER IN RIO GRANDE DO SUL, BRAZIL
Medeiros, Edgardo Ramos1; Pedron, Fabricio de Araujo2; Reinert, Dalvan Jose2; Volpato Sccoti, Anderson Augusto3
通讯作者Medeiros, Edgardo Ramos
来源期刊REVISTA BRASILEIRA DE CIENCIA DO SOLO
ISSN0100-0683
出版年2013
卷号37期号:3页码:555-564
英文摘要

In the west and southwest regions of Rio Grande do Sul (RS) there are extensive areas with fragile soils developed from sandy sediments of the continental Mesozoic Parana Basin. Inappropriate land use has accelerated the process of sandy desertification in these areas. In this case, the knowledge of soils is critical for the choice of appropriate management systems to regain sustainability. The objectives of this study were to understand the evolution and describe the relationships, in terms of origin, between the rock and its respective pedological cover by studying profiles developed from sandstones of the Guara Formation in RS. Soil chemical, physical, mineralogical, and morphological analyses were carried out with samples of two Dystrudept and one Rhodudult profile. There was evidence of external addition of material to the studied profiles, mainly of ilmenite, resulting from the alteration of areas with basic volcanic rocks in the surroundings. The inclusion of allochthonous material in the soil profiles was responsible for a pedogenesis leading to B horizons with higher clay contents, a feature of Ultisols and Cambisols. The data suggest the identification and interpretation of a sixth pedogenetic component, defined as the geological context of the surroundings.


英文关键词pedology sandy soils desertification Pampa ecosystem
类型Article
语种葡萄牙语
国家Brazil
收录类别SCI-E
WOS记录号WOS:000322066500001
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/2XILL650/179779
作者单位1.Univ Fed Santa Maria UFSM, Dept Geociencias, BR-97105900 Santa Maria, RS, Brazil;
2.Univ Fed Santa Maria, Dept Solos, Santa Maria, RS, Brazil;
3.Univ Fed Santa Maria, Santa Maria, RS, Brazil
推荐引用方式
GB/T 7714
Medeiros, Edgardo Ramos,Pedron, Fabricio de Araujo,Reinert, Dalvan Jose,et al. ORIGIN OF SANDSTONES FROM THE GUARA FORMATION AND THEIR PEDOLOGIC COVER IN RIO GRANDE DO SUL, BRAZIL[J],2013,37(3):555-564.
APA Medeiros, Edgardo Ramos,Pedron, Fabricio de Araujo,Reinert, Dalvan Jose,&Volpato Sccoti, Anderson Augusto.(2013).ORIGIN OF SANDSTONES FROM THE GUARA FORMATION AND THEIR PEDOLOGIC COVER IN RIO GRANDE DO SUL, BRAZIL.REVISTA BRASILEIRA DE CIENCIA DO SOLO,37(3),555-564.
MLA Medeiros, Edgardo Ramos,et al."ORIGIN OF SANDSTONES FROM THE GUARA FORMATION AND THEIR PEDOLOGIC COVER IN RIO GRANDE DO SUL, BRAZIL".REVISTA BRASILEIRA DE CIENCIA DO SOLO 37.3(2013):555-564.
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