Lithic soils in the semi-arid region of Brazil:edaphic characterization and susceptibility to erosion

作     者：Carlos R PINHEIRO JUNIOR Conan A SALVADOR Tiago R TAVARES Marcel C ABREU Hugo S FAGUNDES Wilk S ALMEIDA Eduardo C SILVA NETO Lúcia H C ANJOS Marcos G PEREIRA Carlos R PINHEIRO JUNIOR;Conan A SALVADOR;Tiago R TAVARES;Marcel C ABREU;Hugo S FAGUNDES;Wilk S ALMEIDA;Eduardo C SILVA NETO;Lúcia H C ANJOS;Marcos G PEREIRA

作者机构：Federal Rural University of Rio de Janeiro(UFRRJ)Department of SoilsSeropédicaRio de Janeiro 23890Brazil Center for Nuclear Energy in Agriculture(CENA)University of São Paulo(USP)PiracicabaSão Paulo 13416Brazil Federal Institute of EducationScience and Technology of Rondônia(IFRO)Rural ZoneAriquemesRondônia 78930Brazil 

出 版 物：《Journal of Arid Land》 (干旱区科学（英文版）)

年 卷 期：2022年第14卷第1期

页      面：56-69页

核心收录：

学科分类：082802[工学-农业水土工程] 090707[农学-水土保持与荒漠化防治] 0907[农学-林学] 08[工学] 0828[工学-农业工程] 09[农学] 0815[工学-水利工程] 

基　　金：funded in part by the Coordination for the Improvement of Higher Education Personnel,Brazil(CAPES Finance code 001) the Carlos Chagas Filho Foundation for Supporting Research in the State of Rio de Janeiro,FAPERJ.Tiago R TAVARES was funded by the São Paulo Research Foundation(FAPESP 2020/16670-9) 

主　　题：Caatinga biome drylands erosive processes leptosols soil degradation 

摘      要：Soils(Leptosols or Epileptic Regosols)with lithic contact at a depth of 50 cm occupy almost 20%of the Brazilian semi-arid *** lithic soils are susceptible to erosion due to faster saturation of water-holding capacity during rainfall,which accelerates the beginning of ***,erosion traits of lithic soils in the semi-arid region of Brazil are less *** aim of this study was to characterize the soil and landscape attributes in areas with Neossolos Litólicos(Entisols)in the Caatinga biome to identify region of high susceptibility to *** showed that the soils were characterized by a sandy texture,soil structure with poor development and low content of organic *** attributes increase susceptibility to erosion and reduce water storage capacity,especially in the states of Cearáand *** these states,the content of rock fragments in the soil reaches 790 g/*** contents of silt and fine sand,high silt/clay ratio,predominance of Leptosols and strong rainfall erosivity were observed in Piauíand northwestern Ceará.A very high degree of water erosion was observed in the states of Pernambuco and Paraí*** the low degree of erosion observed in the state of Bahia,it is highly susceptible to erosion due to the predominance of very shallow soils,rugged relief and high values of rainfall *** vulnerability was observed in the state of Alagoas because of its more smoothed relief,greater effective soil depth,thicker A horizon of soil and lower rainfall *** general,the characteristics that intensify the susceptibility to erosion in the Caatinga biome are those soil structures with poor development or without aggregation,low contents of organic carbon,high contents of silt and fine sand,high values of silt/clay ratio and rugged relief in some *** study collected information contributing to a better characterization of soils with lithic contact in the semi-arid region of *** addition,regions with