8
views
0
recommends
+1 Recommend
1 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: found
      Is Open Access

      Comparative study of metal contents in Brazilian coffees cultivated by conventional and organic agriculture applying principal component analysis

      research-article

      Read this article at

      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          The aim of this study was to evaluate of availability of nutrients and toxic elements in green coffees produced in traditional, technological and transitional organic farms in Southwest Bahia-Brazil. Levels of the nutrients minerals were determined directly in samples of soils and coffee tissues from four farms by flame atomic absorption spectrometry (FAAS) and toxic elements (Cr, Ni, Cd and Pb) by inductively coupled plasma optical emission spectrometry (ICP OES). The application of statistical methods (cluster and principal components analysis) revealed the importance of the conversion period to guarantee a product genuinely organic during the change to organic agriculture. On the other hand, the study of correlations between agricultural methods and metals concentrations in coffee suggested that Cd, Cu, Zn and other toxic elements contained in some inorganic fertilizers used in the traditional and technological coffee farms may cause an increase of toxic metals concentration in the crop soil, be taken up by plants, and passed on in the food chain.

          Translated abstract

          Neste trabalho, avaliou-se a disponibilidade de nutrientes minerais e elementos tóxicos em cafés produzidos pelas agriculturas orgânica, tradicional e tecnológica no sudoeste da Bahia, Brasil. Os nutrientes minerais foram determinados em amostras de solos e tecidos de café por espectrometria de absorção atômica com chama (FAAS) e os elementos tóxicos (Cr, Ni, Cd e Pb) por espectrometria de emissão ótica por plasma indutivamente acoplado (ICP OES). A aplicação de métodos estatísticos (análises de agrupamento e de componentes principais) aos resultados analíticos confirmou a importância do "período de conversão", durante o processo de mudança do manejo da cafeicultura tradicional para orgânica. Os resultados possibilitam inferir que o Cd, Cu, Zn e outros elementos tóxicos contidos nos fertilizantes inorgânicos (utilizados na cafeicultura tradicional e tecnológica), e os níveis relativamente elevados de Cu e Zn presentes nos adubos orgânicos (utilizados na cafeicultura orgânica) podem causar aumentos dos níveis desses elementos nos solos agrícolas, podendo assim, passar para a cadeia alimentar através dos cultivos.

          Related collections

          Most cited references4

          • Record: found
          • Abstract: not found
          • Book: not found

          Methods for chemical analysis of water and wastes

          (1983)
            Bookmark
            • Record: found
            • Abstract: not found
            • Book: not found

            Methods of soil analysis part 1

              Bookmark
              • Record: found
              • Abstract: not found
              • Book: not found

              Handbook of Residue Analytical Methods for Agrochemicals

                Bookmark

                Author and article information

                Journal
                jbchs
                Journal of the Brazilian Chemical Society
                J. Braz. Chem. Soc.
                Sociedade Brasileira de Química (São Paulo, SP, Brazil )
                0103-5053
                1678-4790
                2010
                : 21
                : 8
                : 1468-1476
                Affiliations
                [01] Vitória da Conquista BA orgnameUniversidade Estadual do Sudoeste da Bahia orgdiv1Departamento de Ciências Naturais Brazil
                Article
                S0103-50532010000800009 S0103-5053(10)02100809
                10.1590/S0103-50532010000800009
                0880a604-259a-4897-ad47-3a0085c08ecf

                This work is licensed under a Creative Commons Attribution 4.0 International License.

                History
                : 13 November 2009
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 33, Pages: 9
                Product

                SciELO Brazil

                Categories
                Articles

                nutrients and toxic elements,traditional coffee,principal component analysis (PCA),organic farm,technological coffee,available metals in soil,organic coffee

                Comments

                Comment on this article