Plant growth and metabolism of exotic and native Crotalaria species for mine land rehabilitation in the Amazon  

作　　者：Hemelyn Soares das Chagas Rafael Silva Guedes Markus Gastauer Paula Godinho Ribeiro Allan Klynger da Silva Lobato Cecílio Frois Caldeira Fabrício William deÁvila AndréRodrigues dos Reis Silvio Junio Ramos 

机构地区：[1]Instituto Tecnológico Vale,Rua Boaventura da Silva,955,Belém,PA 66055-090,Brazil [2]Universidade Federal do Sul e Sudeste do Pará,Xinguara,PA,Brazil [3]Núcleo de Pesquisa Vegetal Básica e Aplicada,Universidade Federal Rural da Amazônia,Paragominas,PA,Brazil [4]Departamento de Engenharia Florestal,Universidade Estadual do Centro-Oeste/UNICENTRO,Irati,PR,Brazil [5]School of Sciences and Engineering,São Paulo State University(UNESP),Tupã,SP.CEP 17602-496,Brazil

出　　处：《Journal of Forestry Research》2024年第1期143-154,共12页林业研究（英文版）

基　　金：This research was supported by the Conselho Nacional de Desenvolvimento Científico e Tecnológico(CNPq);the Instituto Tecnológico Vale(ITV),Fundação de Desenvolvimento da Pesquisa(FUNDEP);Fundação de Amparo e Desenvolvimento da Pesquisa(FADESP).

摘　　要：Despite its enormous benefits,mining is respon-sible for intense changes to vegetation and soil properties.Thus,after extraction,it is necessary to rehabilitate the mined areas,creating better conditions for the establishment of plant species which is challenging.This study evaluated mineral and organic fertilization on the growth,and carbon and nitrogen(N)metabolism of two Crotalaria species[Cro-talaria spectabilis(exotic species)and Crotalaria maypu-rensis(native species from Carajás Mineral Province(CMP)]established on a waste pile from an iron mine in CMP.A control(without fertilizer application)and six fertilization mixtures were tested(i=NPK;ii=NPK+micronutrients;iii=NPK+micronutrients+organic compost;iv=PK;v=PK+micronutrients;vi=PK+micronutrients+organic compost).Fertilization contributed to increased growth of both species,and treatments with NPK and micronutrients had the best results(up to 257%cf.controls),while organic fertilization did not show differences.Exotic Crotalaria had a greater number of nodules,higher nodule dry mass,chlorophyll a and b contents and showed free ammonium as the predominant N form,reflecting greater increments in biomass compared to native species.Although having lower growth,the use of this native species in the rehabilitation of mining areas should be considered,mainly because it has good development and meets current government legislation as an opportunity to restore local biodiversity.

关 键 词：Biological nitrogen fixation Mining Nitrogen metabolism Plant nutrition 

分 类 号：Q945[生物学—植物学]