Resumo

NARVAEZ CASTILLO, Magda; SANCHEZ DE PRAGER, Marina  e  MENJIVAR FLORES, Juan Carlos. Effect of vinasse application on physical properties and dehydrogenases activity in soils under sweet corn (Zea mays L.) cultivation. Acta Agron. [online]. 2010, vol.59, n.2, pp.211-217. ISSN 0120-2812.

The effect of vinasse application was assessed on physical properties and dehydrogenases activity in Entic Dystropept and Fluventic Haplustoll of Valle del Cauca, Colombia. To meet the requirements of K+ in sweet corn (Zea mays L.) six treatments were used (T1 = 100% of K+ as vinasse; T2 = 100% of K+ with KCl; T3 = 50% of K+ as vinasse and KCl; T4 = 75% of K+ with vinasse and 25% of K+ as KCl; T5 = absolute control without plants; T6 = control plus plants) arranged in a completely randomized design with five replications. In Dystropept Entic bulk density decreased and consequently the total porosity increased, while the opposite happened in Haplustoll Fluventic. The dehydrogenase activity was significantly higher (P <0.05) in the Dystropept Entic than in Haplustoll Fluventic presenting low values. The results showed that the changes that are generated as a result of the application of vinasse are different for each type of soil.

Palavras-chave : Organic admendement; enzymatic activity; vinasse; Typic Argiudoll; Fluventic Haplustoll; chemicophysical properties; Zea mays L..

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