Soil Enzymatic Activities in Areas With Stages and Management of Forest Regeneration From Caatinga

Abstract

The tropical dry areas have suffered the most severe anthropic pressures. This factor motivates studies aimed at characterizing and monitoring the soil quality to determine the management measures to apply and to suggest appropriate recovery procedures. The objective of this study was to evaluate the enzymatic activity of acid and alkaline phosphatases, urea and arylsulfatase in the superficial layers of soils in areas under different stages of forest regeneration, in Floresta-PE City.. Soil sampling was conducted at 0-5, 5-15 and 15-30 cm layer in the following areas: C-18 (vegetation regeneration for 18 years), P-13 (13 years), L-12 (12 years), C-9 (9 years), C-7 (7 years) and G-4 (4 years). The analytical methods used in the study were based on the incubation of the soil samples with a buffered solution of substrate specific for each enzyme. The methods were based on colorimetric determinations. The activity of acid and alkaline phosphatase and urease represented sensitive measures for detecting changes in soil quality at various stages of regeneration in tropical dry forests. The area with the longest duration of forest regeneration (C-18) showed higher enzyme activities. The soil enzymatic activities respond to different stages and management of forest regeneration in Brazilian tropical dry areas, namely Caatinga. The acid and alkaline phosphatase, arylsulfatase and urease increased with time of regeneration.

Assessment of biological activity in mountain chernozems and mountain-meadow chernozemic soils of natural biogeocenoses in the Central Caucasus, Russia

“…The established differences in absolute values between soil types are statistically significant for all enzymes (t ≥ 2.72; p ≥ 0.00), except for urease (t = 1.41; p = 0.16). According to the literature data (Sinsabaugh et al, 2010;Oliveira Silva et al, 2018;Kazeev et al, 2021) and the results of previous studies of the lowland chernozems of Kabardino-Balkaria (Gedgafova et al, 2015;Gorobtsova et al, 2016) the activity of hydrolytic enzymes is closely related to the organic matter content.…”

Qualidade Do Solo: Indicadores Biológicos Para Um Manejo Sustentável / Soil Quality: Biological Indicators for Sustainable Management

“…As enzimas do solo podem ser divididas em classes, como, por exemplo, a urease, que é uma enzima da classe da hidrolase que participam ativamente na ciclagem de nutrientes do solo e hidrólise da matéria orgânica do solo. A urease é indicadora da transformação do nitrogênio orgânico em mineral, processo denominado de mineralização (SILVA et al, 2018). A enzima desidrogenase tem sua atividade associada à respiração referente na atividade metabólica, as proteases, quebrando a cadeia proteica em peptídeos menores que sofrerão a ação das peptidases; e a arilsulfatase é responsável pela ciclagem do enxofre no solo (BALOTA et al, 2013).…”

Indicadores químicos e físicos de qualidade do solo

“…As enzimas podem desempenhar diversas ações quanto a conservação e a qualidade do solo, além do manejo adotado. Em estudo com a atividades enzimáticas em áreas com estágios e gestão da regeneração florestal, Silva et al (2018), observaram que a área com maior duração de regeneração apresentou a maior atividade média de uréase, e a área com menor tempo de regeneração apresentou a menor atividade média de uréase.…”