Abstract

SANCHEZ NIEVES, Jimena; AVELLANEDA-TORRES, Lizeth Manuela; MELGAREJO, Luz Marina  and  FUENTES DE PIEDRAHITA, Cilia Leonor. Amidase Activity Of Soils Under Potato Cropping With Conventional Management And Under Native Grassland. Cienc. suelo [online]. 2014, vol.32, n.1, pp.21-27. ISSN 1850-2067.

Amidase enzymatic activity was evaluated in soils under potato cropping with a conventional management with agrochemical application (PCA) and in soils under pasture without agrochemical application (PSA) in farms at Tausa, Villapinzón, and Zipaquirá located in the province of Cundinamarca (Colombia). Correlations between amidase enzymatic activity and other enzymatic activities related to the nitrogen cycle (e.g., urease and protease) and soil physicochemical parameters were also evaluated. The PCA samples showed null or low amidase activity compared to the PSA samples. The difference could be due to the application of agrochemicals and chemical supplements, which possibly affected soil microbiota and consequently the soil enzymatic activity. Similarly, the low amidase activity observed could be an indicator that carbofuran degradation via the amidase pathway did not occur at a significant level in the PCA soil. A direct relationship was observed between amidase, urease, and protease activities and the concentrations of soil microelements such as Mn, Fe, and Cu.

Keywords : Edaphic enzyme; Urease.

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