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- Title
EFECTO DE LA HUMEDAD, TEMPERATURA Y PH DEL SUELO EN LA ACTIVIDAD MICROBIANA A NIVEL DE LABORATORIO.
- Authors
Vásquez, Elena Ramos; Dávila, Doris Zúñiga
- Abstract
The aim of this study was to evaluate the influence of three physical-chemical parameters on microbial activity of farm soils under controlled laboratory conditions (18% humidity, 27.5 °C and pH 7.8). Microbial activities were quantified by carbon dioxide production and dehydrogenase activity. Three different essays for 4 moisture percentages (v/w): 5.0%, 10.0%, 15.0% and 18.0%, 4 temperatures: 8.0 °C, 21.0 °C, 27.5 °C and 37.0 °C, and 4 pH values: 4.0, 6.1, 7.8 and 8.2 were evaluated. A Completely Randomized Design (CRD) was used for each essay consisting of four treatments and four replicates per treatment. The highest values on microbial activity [0.097 mg CO2⋅g-1⋅h-1 and 173.09 µg formazán⋅g-1⋅(24h)-1] were obtained at 18% humidity. It was found out that a temperature of 27.5 °C was optimum for carbon dioxide production [0.140 mg CO2⋅g- 1⋅h-1], and 37.0 °C for dehydrogenase activity [156.78 µg formazán⋅g-1⋅(24h)-1]. A near to neutral pH (7.8) was established as optimum [0.055 mg CO2⋅g-1⋅h-1and 171.19 µg formazán⋅g-1⋅(24h)-1].
- Subjects
SOIL microbiology; CARBON dioxide; DEHYDROGENASES; SOIL moisture measurement; FIRE assay
- Publication
Ecologia Aplicada, 2008, Vol 7, Issue 1/2, p123
- ISSN
1726-2216
- Publication type
Article
- DOI
10.21704/rea.v7i1-2.367