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Please use this identifier to cite or link to this item: http://hdl.handle.net/1807/5094

Title: INVESTIGACIÓN - INFLUENCIA DE LA ADICIÓN DE NITRÓGENO Y FÓSFORO SOBRE LA DESCOMPOSICIÓN DE PAJA DE TRIGO EN UN SUELO DERIVADO DE CENIZAS VOLCÁNICAS (Influence of nitrogen and phosphorous addition on the decomposition of wheat straw in a soil derived from volcanic ash)
Authors: Zagal, Erick
Longeri, Luis
Vidal, Iván
Hoffman, Glenn
González, Ricardo
Keywords: soil incubation, microbial activity, management of residues, C and N mineralization, Triticum aestivum .
incubación de suelos, actividad microbiana, manejo de residuos, mineralización de C y N, Triticum aestivum .
Issue Date: 31-Dec-2003
Publisher: Instituto de Investigaciones Agropecuarias, INIA
Citation: Agricultura Técnica (ISSN: 0365-2807) Vol 63 Num 4
Abstract: In a Typic Haploxerand soil (Santa Bárbara) from the VIII Region, Chile , the effect of the addition of N and P on mineralization of C and N as indicators of the rate of wheat ( Triticum aestivum L.) straw decomposition was studied. Wheat straw was either left as a cover or incorporated into the soil in combination with N (0 and 100 mg kg-1 soil) and P applications (0 and 65 mg kg-1 soil) . Respiratory activity of microbial biomass was determined by soil incubation without air influx. Results showed highly significant effects (P ≤0.01) of wheat straw and P treatments on C mineralization. Wheat straw treatments showed 3 to 4 times more mineralization than the control treatment without straw. There was a greater positive effect on C mineralization when the straw was incorporated (12-15% higher) than when it was only left on the soil surface until 32 days and the application of P until day 12. There was no significant (P ≤ 0.01) effect of N application on C mineralization. There was no difference in the rate of straw decomposition in the treatments with straw on the soil surface. Soil-N mineralization increased at 92 days with N addition to the soil. The average values determined were 90.18 and 33.79 mg N kg-1 soil for treatments with and without N addition, respectively. However, straw addition caused highly significant immobilization of N at both 45 and 92 days.
URI: http://hdl.handle.net/1807/5094
Other Identifiers: http://www.bioline.org.br/abstract?id=at03046
Rights: Copyright 2003 - Instituto de Investigaciones Agropecuarias, INIA (Chile). Free, full-text also available from http://www.inia.cl/at/agritec.htm
Appears in Collections:Bioline International Legacy Collection

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