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Please use this identifier to cite or link to this item: http://hdl.handle.net/1807/22535


Title: Microbial activity in a volcanic ash soil under different agricultural management
Authors: Zagal, Erick
Rodríguez, Nicasio
Vidal, Iván
Quezada, Lorena
Keywords: mineralized C, soil quality, mineralized N, crop sequence
C-mineralizado, calidad de suelo, N-mineralizado, rotaciones
Issue Date: 31-Dec-2002
Publisher: Instituto de Investigaciones Agropecuarias, INIA
Citation: Agricultura Técnica (ISSN: 0365-2807) Vol 62 Num 2
Abstract: The microbial activity of a volcanic soil of the Central Valley (Typic Melanoxerand) was measured at the end of a 7 years-old experiment in 6 crop rotations with different agricultural management and soil use intensity. Undisturbed samples of this soil were incubated in laboratory by 30 days under temperature (25ºC) and moisture controlled conditions. C-CO 2 mineralization was determined every 10 days and the N inorganic mineralization by quantifying its increment among days 0 and 30. At the same time, organic carbon (C) was determined in composite samples of the same essay. Quantification of C-CO 2 mineralization was effectively more sensitive than organic C determination to rotation treatments and it evidenced changes early in the fertility of the soil. A significant correlation (P ≤0.05) was found between C and nitrogen (N) mineralization (r = 0.61) showing similar effects of agricultural management in both parameters. The organic matter content of the different rotations correlated significantly with microbial activity (mineralized C-CO 2 ) confirming by this way the utility of this biological index in the evaluation of soil degradation in function of their use intensity.
URI: http://hdl.handle.net/1807/22535
Other Identifiers: http://www.bioline.org.br/abstract?id=at02029
Rights: Copyright 2002 - Instituto de Investigaciones Agropecuarias, INIA (Chile)
Appears in Collections:Bioline International Legacy Collection

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