干旱区生态环境知识资源中心(Arid): Mineralogy and genesis of Planosols under a semi-arid climate, Borborema Plateau, NE Brazil

Arid

DOI	10.1016/j.catena.2019.104260
	Mineralogy and genesis of Planosols under a semi-arid climate, Borborema Plateau, NE Brazil
	Santos de Sousa, Juliet Emilia 1; Barros dos Santos, Jean Cheyson 1; Correa, Marcelo Metri 2; do Nascimento, Alexandre Ferreira 3; Bretas Bittar Schulze, Sheila Maria 1; Ferreira, Tiago Osorio 4; de Araujo Filho, Jose Coelho 5; de Souza Junior, Valdomiro Severino 1
通讯作者	de Souza Junior, Valdomiro Severino
来源期刊	CATENA
ISSN	0341-8162
EISSN	1872-6887
出版年	2020
卷号	184
英文摘要	Planosols, such as those found on the Borborema Plateau, NE Brazil, form an important class of moderately weathered soils that support subsistence agriculture in underdeveloped regions of Africa, Asia, and South America. Despite its socioeconomic importance, the genesis of this soil class has not yet been fully elucidated. This study was conducted with the aim of improving knowledge about the genesis of Planosols under a semi-arid climate. Three Planosol profiles on the Borborema Plateau in NE Brazil were collected, classified, and described morphologically, and the main physical and chemical attributes, the pedogenetic forms of iron oxides, and the mineralogical compositions of the sand, silt, and clay fractions were determined. The results indicate that: (a) parent materials richer in feldspar and biotite favor the formation of Planosols with a higher clay content; (b) the dissolution of primary minerals and the formation of clay minerals (known as the argillation process) are fundamental for the genesis of Bt horizons; (c) depth-drainage deficiency leads to hydromorphism, an associated gray color, and the formation of mottles; and (d) monosialitization and bisialitization processes (kaolinite formation and the formation of 2:1 clay minerals, respectively) prevail in Planosols located within landscape positions that have good and poor drainage, respectively. In addition, the present study shows that Planosols under a semi-arid climate can have a clay fraction consisting predominantly of kaolinite, and mineralogical alteration pathways similar to those described in soils under an analogous climate and geology in Northwest Africa; this refutes classical theories that soils with 2:1 clay minerals prevail in warmer and drier regions. This study thus provides greater knowledge about the attributes of Planosols in dry and poor regions and can be used as a reference in studies on the sustainable use and management of such soils.
英文关键词	Argillation Hydrolysis Mineral alteration Kaolinite Smectite
类型	Article
语种	英语
国家	Brazil
收录类别	SCI-E
WOS记录号	WOS:000525323800018
WOS关键词	AGRESTE REGION ; GRANITE ; DITHIONITE ; PERNAMBUCO ; FEATURES ; ROCKS ; SW
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/2XILL650/314219
作者单位	1.Univ Fed Rural Pernambuco UFRPE, Dept Agron, BR-52171900 Recife, PE, Brazil; 2.Univ Fed Rural Pernambuco UFRPE, Unidade Acad Garanhuns, BR-55292270 Garanhuns, PE, Brazil; 3.Empresa Brasileira Pesquisa Agr, Embrapa Agrossilvipastoril, BR-78550970 Sinop, Mato Grosso, Brazil; 4.Univ Sao Paulo, Dept Ciencia Solo ESALQ, BR-13418900 Sao Paulo, Brazil; 5.Empresa Brasileira Pesquisa Agr Embrapa Solos, UEP, BR-51020240 Recife, PE, Brazil
推荐引用方式 GB/T 7714	Santos de Sousa, Juliet Emilia,Barros dos Santos, Jean Cheyson,Correa, Marcelo Metri,et al. Mineralogy and genesis of Planosols under a semi-arid climate, Borborema Plateau, NE Brazil[J],2020,184.
APA	Santos de Sousa, Juliet Emilia.,Barros dos Santos, Jean Cheyson.,Correa, Marcelo Metri.,do Nascimento, Alexandre Ferreira.,Bretas Bittar Schulze, Sheila Maria.,...&de Souza Junior, Valdomiro Severino.(2020).Mineralogy and genesis of Planosols under a semi-arid climate, Borborema Plateau, NE Brazil.CATENA,184.
MLA	Santos de Sousa, Juliet Emilia,et al."Mineralogy and genesis of Planosols under a semi-arid climate, Borborema Plateau, NE Brazil".CATENA 184(2020).