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Neste trabalho, determinaram-se os teores totais das substâncias quimicas presentes em um Latossolo Vermelho aluminoferrico utilizando a tecnica de espectroscopia total de fluorescencia de raios-X. A pesquisa teve como objetivo criar uma base de dados geoquimica para os solos da regiao sudoeste do Parana; comparar os resultados com valores de referencia nacional e internacional; avaliar o efeito dos sistemas plantio direto versus convencional de cultivo e; de plantas de cobertura de inverno, na geoquimica do solo de um experimento de longa duracao. As coletas de solo se deram em tres locais distintos, em tres camadas (0-10, 10-20 e 20-40 cm). A tecnica utilizada forneceu de maneira rapida e limpa a impressao digital quimica do solo e os mesmos servem de background para o sudoeste do Parana. Os teores de elementos quimicos preconizados por organizacoes nacionais e internacionais nao estao alinhados com os teores observados em areas nao antropizadas do estado do Parana. Os resultados obtidos tambem mostraram que 29 anos apos a implantacao do experimento, a fertilidade natural foi alterada e que, a substituicao da vegetacao nativa por sistemas cultivados levou a exportacao de algumas substâncias quimicas do solo como SO3, MnO, Co e, ao acumulo de outras como CaO, K2O e MgO. No sistema plantio direto (0-10 cm) concentraram-se os maiores teores de substâncias de origem antropogenica. O sistema convencional de cultivo apresentou diferenciacao significativa nos teores entre as plantas de cobertura e nao significativa entre as camadas de solo. Normal 0 21 false false false PT-BR X-NONE X-NONE /* Style Definitions */ table.MsoNormalTable {mso-style-name:"Tabela normal"; mso-tstyle-rowband-size:0; mso-tstyle-colband-size:0; mso-style-noshow:yes; mso-style-priority:99; mso-style-parent:""; mso-padding-alt:0cm 5.4pt 0cm 5.4pt; mso-para-margin-top:0cm; mso-para-margin-right:0cm; mso-para-margin-bottom:10.0pt; mso-para-margin-left:0cm; line-height:115%; mso-pagination:widow-orphan; font-size:11.0pt; font-family:"Calibri","sans-serif"; mso-ascii-font-family:Calibri; mso-ascii-theme-font:minor-latin; mso-hansi-font-family:Calibri; mso-hansi-theme-font:minor-latin;} A B S T R A C T In this work, the total chemical element levels in a Rhodic Hapludox were determined using total X-ray fluorescence spectroscopy. The research aimed to create a geochemical database of soils in the southwestern region of Parana; compare the values obtained with national and international reference values; evaluate the effect of no-tillage versus conventional tillage systems and; coverage plants on the soil geochemistry in a long term experiment. Soil collections were made in three different locations, each in three layers (0-10, 10-20 and 20-40 cm). The technique gave a quick, clean chemical digital impression of the soil which also can be used as a background for the southwestern Parana. The levels of chemicals recommended by national and international organizations are not aligned with the levels observed in non-disturbed areas of Parana State. The results also showed that twenty nine years after the beginning of the experiment, the natural fertility changed and that, with the substitution of native vegetation for cultivation systems, levels of some components such as SO 3 , MnO and Co decreased and those of others such as CaO, K 2 O and MgO increased. In soils for which no-tillage systems (0-10 cm) is the largest concentrations of anthropogenic substances. The conventional tillage systems gave levels very different from those found in soils under coverage plants and not significantly different between the soil layers. Keywords: soil management, cover crops, no tillage, conventional tillage, geochemistry .

Composição Total Elementar do Solo de um Experimento de Longa Duração Usando Espectroscopia Total de Fluorescência de Raios-X (Total elemental composition of a soil in a long term experiment using X-Ray fluorescence spectroscopy)