Resumen de Effect of biochar on enzymatic activity in a brazilian oxisol
- English
The objective of this work was to assess the long-term effect of biochar application on enzyme activity in an Oxisol of Brazilian Cerrado. The experiment was conducted with a randomized block design consisting of the combination of two levels of fertilization (0 and 200 kg ha-1, NPK 00-20-20 formulation) and five levels of biochar (0, 2, 4, 8 and 16 Mg ha-1). The activity of urease, β-glucosidase, acid phosphatase, and total soil enzyme (hydrolysis of fluorescein diacetate - FDA) were evaluated in soil samples. The activity of urease and β-glucosidase were significantly increased by the application of biochar with and without chemical fertilization, respectively. Intermediate doses of biochar increased total soil enzyme activity. There was no effect of biochar on acid phosphatase activity. The application of biochar associated with chemical fertilization promotes urease, β-glucosidase and total soil enzyme activity.
- português
O objetivo do trabalho foi avaliar o efeito de biochar sobre a atividade das enzimas em um Latossolo sob Cerrado no Brasil. O experimento foi conduzido em blocos casualizados consistindo de dois níveis de fertilização (0 e 200 kg ha-1 NPK 00-20-20) e cinco níveis de biochar (0, 2, 4, 8 e 16 Mg ha-1). A atividade das enzimas urease, β-glucosidase, fosfatase acida e hidrolise de diacetato de fluoresceína – FDA, foi avaliada. As atividades da urease e β-glucosidase foram aumentadas pela aplicação do biochar com e sem fertilização química. As doses intermediarias do biochar aumentaram a atividade do FDA no solo. Não houve efeito do biochar sobre a fosfatase acida. A aplicação do biochar promove aumentada atividade das enzimas urease, β-glucosidase e a atividade enzimática total.
