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Effect of sulphur inoculated with Thiobacillus on soil salinity and growth of tropical tree legumes by N.P Stamford; A.J.N Silva; A.D.S Freitas; J.T Araújo Filho is a Engineering article available to read on EtoBox.

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A greenhouse experiment was carried out with the objective of evaluating the eects of the elementary sulphur inoculated with Thiobacillus, compared with gypsum, in the amendment of a alluvial sodic saline soil from the Brazilian semiarid region, irrigated with saline water and grown with the tropical legumes leucena and mimosa. The treatments consisted of levels of sulphur (0; 300 and 600 kg/ha) and gypsum (1200 and 2400 kg/ha), irrigation using dierent waters containing the salts NaHCO 3 , MgCl 2 , CaCl 2 , NaCl and KCl, with dierent electrical conductivities (ECs: 0.2, 6.1 and 8.2 dS/m at 25°C). Based on the results it appears that saline water increased exchangeable Na , K , Ca 2 ; Mg 2 , and soil pH. Sulphur inoculated with Thiobacillus was more ecient than gypsum in the reduction of the exchangeable sodium of the soil and promoting leaching of salts, especially sodium. Sulphur inoculated with Thiobacillus reduced the EC of the soil saturation extract to levels below that adopted in soil classi®cation of sodic or saline sodic. Leucena was more tolerant to salinity and mimosa more resistant to acidity promoted by sulphur inoculated with Thiobacillus.

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Author

N.P Stamford; A.J.N Silva; A.D.S Freitas; J.T Araújo Filho

Publisher

Elsevier Science; Elsevier ; Elsevier BV (ISSN 0960-8524)

Published

2002

Language

EN

Field

Engineering (Physical Sciences)