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Please use this identifier to cite or link to this item: http://hdl.handle.net/1807/22226

Title: Soil light organic matter fraction of a volcanic soil under different agronomic management as an indicator of changes in labile organic matter
Authors: Zagal, Erick
Vidal, Nicasio Rodríguez Iván
Flores, A. Bárbara
Keywords: soil physical fractionation by density, NaI, C, N, volcanic ash soils, andisols
fraccionamiento físico por densidad, NaI, C, N, trumaos, andisoles alofánicos.
Issue Date: 31-Dec-2002
Publisher: Instituto de Investigaciones Agropecuarias, INIA
Citation: Agricultura Técnica (ISSN: 0365-2807) Vol 62 Num 2
Abstract: Starting from an 18-year experiment with different crop rotations, samples of soil of volcanic origin from the foothills of Ñuble (37º09' S lat.; 72º02' W long.) were obtained in order to determine the effect of agricultural management on light fraction (FL) of the organic matter. FL was separated by density using NaI (d = 1,8 g cm -3 ). Carbon (C) and nitrogen (N) contents were determined by dry combustion both in the whole soil and the isolated FL. Light fraction contents were higher than those found in other research with non-volcanic soils. However, a clear trend to decrease FL was observed when soil use was intensified. The C or N proportions of the soil and the FL presented similar results. The use of this fraction as a sensitive indicator of changes in labile organic matter produced by different agricultural management is discussed.
URI: http://hdl.handle.net/1807/22226
Other Identifiers: http://www.bioline.org.br/abstract?id=at02028
Rights: Copyright 2002 - Instituto de Investigaciones Agropecuarias, INIA (Chile)
Appears in Collections:Bioline International Legacy Collection

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