Abstract

NARVAEZ CASTILLO, Magda; SANCHEZ DE PRAGER, Marina  and  MENJIVAR FLORES, Juan Carlos. CHANGES IN CHEMICAL PROPERTIES AND PHOSPHATASES ACTIVITY IN SOILS UNDER SWEET CORN (ZEA MAYS L.) CULTIVATION FERTILIZED WITH VINASSE. Rev. Fac. Nac. Agron. Medellín [online]. 2010, vol.63, n.2, pp.5533-5541. ISSN 0304-2847.

It was evaluated the effect of vinasse application on chemical properties and activity of acid and alkaline phosphatases of two soils of Valle del Cauca Colombia (Typic Argiudoll and Fluventic Haplustoll) under controlled conditions. Six treatments and five replicates arranged in a completely randomized design were stablished; four of them, sought meet the requirements of K+ crop sweet corn as follows: T1, 100% of K+ with vinasse, T2 100% K+ with KCl T3 50% of K+ with vinasse and 50% KCl, and T4 75% of K+ with vinasse and 25% with KCl, T5 was the absolute control without plant and T6 the witness more plant. The evaluations were conducted over a period of 76 days and samples were taken from 0 - 5 cm deep. The pH, K+, B and Ca + Mg / K decreased significantly (P<0.01), while the contents of K+ and B were increased in both soils The P, Cu, Na and Fe increased differently in each soil. Alkaline phosphatase was significantly higher in the Fluventic Haplustoll and maximum activity occurred at 10 days after sowing (DAS); however, no significant differences between soils with reference to acid phosphatase and increased activity occurred at 38 DAS. A multivariate analysis found no relationship between enzyme activity and chemical analysis.

Keywords : Acid and alkaline phosphatase; vinasse; Fluventic Argiudoll Typic Haplustoll; Zea mays L..

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