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Descripción
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| Organic fertilizers can complement or replace mineral fertilization of a pasture with a sustained production; in this paper an evaluation is made of the changes occurring in the fertility of a soil (short term variable) and in its quality (long term variable) after 7 years of applying two types of organic fertilizer on it: poultry manure (PM) and sewage sludge pellets (SP), in comparison to those produced by mineral fertilization with respect to a control soil. The study has considered easily assessable physical, chemical and biological parameters as being possible -key factors- in the change. In addition, a study was made of the influence of the treatments on the stability of the soil (dispersion analyses), its moisture retention capacity (CAP) and the density of worms in the soil. The organic fertilizers were effective for improving the soil s surface horizon, so that its bulk density diminished and its structural tability increased; its biological activity, evaluated by means of its â - glucosidase activity and worm density, improved, especially with bird manure, which favoured the soil?s stability for plant maintenance, microbial development and C and N storage in the form of organic matter. The soil s water storage capacity and conservation also benefitted from the application of organic fertilizers. The parameters selected which were seen to be sensitive to the different treatments and which, moreover, had important correlations with physical, chemical or biological properties, were designated as the -key factors- of the study | |
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Internacional
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Si |
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Nombre congreso
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EUROSOIL 2008 |
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Tipo de participación
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960 |
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Lugar del congreso
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Viena, Austria |
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Revisores
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Si |
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ISBN o ISSN
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978-3-902382-05-4 |
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DOI
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Fecha inicio congreso
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25/08/2008 |
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Fecha fin congreso
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29/08/2008 |
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Desde la página
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154 |
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Hasta la página
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155 |
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Título de las actas
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Book of Abstracts |