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beta-Glucosidase and proteases activities as affected by long-term management practices in a Typic Argiudoll soil

Author:
Horra, A.M. de la, Conti, M.E., Palma, R.M.
Source:
Communications in soil science and plant analysis 2003 v.34 no.17-18 pp. 2395-2404
ISSN:
0010-3624
Subject:
soil enzymes, proteinases, beta-glucosidase, enzyme activity, Argiudolls, agricultural soils, no-tillage, conventional tillage, grassland soils, pastures, soil organic matter, nitrogen content, carbon, soil fertility, Argentina
Abstract:
The objective of the present study was to determine the effect of tillage systems on the activities of enzymes associated with the carbon (C) and nitrogen (N) cycles (beta-glucosidase and protease) on a Typic Argiudoll (Marcos Juarez Series). The experiment was performed in a randomized complete block design with three replications under no till, conventional tillage and native pasture used as control soil. The activities of beta-glucosidase and protease, total N and oxidizable C contents were determined at depths of 0-5 and 5-15 cm. Not only the activities of both enzymes, but also C and N contents were greater in the native soil at both depths, which shows the impact of land use on this soil. The enzymatic activities in the surface of no-till soil were significantly higher than those for conventional tillage. At the 5-15 cm depth these variables did not present significant differences between tillage systems. The enzymatic activity was more sensitive to tillage systems than oxidizable C content in the first cm of the top layer. These results indicate that beta-glucosidase was a more sensitive index of management effects than protease.
Agid:
1466581