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• W2073833863 abstract "1 RESUMO Os solos degradados por sais ocorrem em todo o mundo, particularmente em regioes aridas e semiaridas da terra, onde a precipitacao pluviometrica e limitada e, ou mal distribuida ou as duas situacoes simultaneamente. Objetivou-se avaliar o efeito de doses de enxofre elementar sobre na correcao de um solo comprometido por excesso de sais e de sodio e no crescimento inicial de craibeira ( Tabebuia aurea). O experimento foi conduzido em casa de vegetacao utilizando-se amostras de um solo salino-sodico de textura franco arenosa. Empregou-se o delineamento inteiramente casualizado, com cinco tratamentos referentes as doses de enxofre elementar (0, 50, 100, 150 e 200% da dose correspondente a necessidade de gesso) em quatro repeticoes. O solo foi acondicionado em vasos de 6 dm 3 e incubado com o corretivo por 20 dias, quando foi analisado quanto a salinidade e sodicidade. Este procedimento foi repetido apos a aplicacao de duas lâminas de lixiviacao dos sais em intervalo de 20 dias. As doses enxofre elementar proporcionaram diminuicao dos valores de pH, PST, RAS e dos teores  soluveis de sodio. Por outro lado, houve aumento dos teores de calcio e magnesio do extrato de saturacao. Pelos resultados, o enxofre diminui a alcalinidade e a sodicidade do solo e eleva os teores de calcio e magnesio, sendo que a dose de S que corrigiu o solo pela reducao de sua PST para 15% foi de 45,5% da necessidade de enxofre. Os valores maximos de crescimento em altura e producao de materia seca da parte aerea e de raizes foram obtidos nas doses de S correspondentes a 48, 45 e 40% da necessidade de gesso, respectivamente. Palavras-chave: Oxidacao de enxofre, sodicidade, corretivos, solo degradado sa, f.v.s.; araujo, j.l.; novaes, m.c.; oliveira, s.r. INITIAL GROWTH OF Tabebuia aurea IN SALINIZED SOIL CORRECTED WITH ELEMENTAL SULFUR 2  ABSTRACT Degradation of soils by salts occurs throughout the  world, particularly in arid and semiarid land, in which rainfall is limited or poorly distributed, or when both situations occur simultaneously.  The study aimed at evaluating the effect of doses of elemental sulfur on the correction of  soil affected by salt and sodium excess, and on initial growth of Tabebuia aurea . The experiment was conducted in a green house with samples of  saline-sodic sandy loam  soil. The experimental design was completely  randomized, with five treatments related to elemental sulfur rates (0, 50, 100, 150 and 200%  of the dose corresponding to the need of gypsum) with four replications.  The soil was placed in 6 dm 3 pots and incubated with the corrective agent for 20 days, and then,  analyzed concerning salinity and sodicity.  This procedure was repeated after applying two-step salt leaching in a 20-day interval.  Rates of elemental sulfur led to a decrease in  values of pH, PST, RAS and soluble sodium concentration. On the contrary, an increase was found in calcium and magnesium levels of the saturation extract.  The results showed that sulfur reduces soil alkalinity and sodicity, and increases calcium and magnesium levels. The rate of S for soil amendment by reduction of  its PST  to 15% was 45.5% of the sulfur need.  The rates of S which led to  the highest values of plant height  and production of shoot and root dry matter  were 48, 45 and 40%, respectively. Keywords: oxidation of sulfur, sodicity, amendments, degraded soil." @default.
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• W2073833863 date "2013-12-09" @default.
• W2073833863 modified "2023-09-30" @default.
• W2073833863 title "CRESCIMENTO INICIAL DE CRAIBEIRA EM SOLO SALINIZADO CORRIGIDO COM ENXOFRE ELEMENTAR" @default.
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• W2073833863 doi "https://doi.org/10.15809/irriga.2013v18n4p647" @default.
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