Resumo

MONTANO SANTANA, Jenny Catherine  e  FORERO ULLOA, Fabio Emilio. The effect of organic byproducts of the jaggery production process on the physical properties of a sulfate acid soil. Corpoica cienc. tecnol. agropecu. [online]. 2013, vol.14, n.2, pp.207-214. ISSN 0122-8706.

Acid sulphate soils have fertility problems because of the modification of physical, chemical and biological properties. However, the addition of organic amendments as a rehabilitation technique of acid sulphate soils allows recovery of soil properties such as aggregate formation and aeration, among others. This study was conducted to evaluate the effect of organic byproducts of sugarcane jaggery production process (leaf litter, bagasse and fresh filter cake) on the physical characteristics (bulk density, total porosity and dry structural stability) of an acid sulphate soil of Paipa (Boyacá) under greenhouse conditions. A trial using a completely randomized design with 9 treatments and 3 replications, corresponding to the incorporation of organic byproducts, alone and in combination, a control (without application) and agronomic treatment (lime dolomite). The soil physical parameters were evaluated at 45 (sampling 1) and 165 days (sampling 2) after amendments application. The results indicated that the application of leaf litter, bagasse and fresh filter cake in the soil, generated a favorable response in the variables: bulk density and total porosity, after 45 days; in the second sampling, the best response in these variables was achieved with 6.2 t/ha of leaf litter. However, the structural stability of soil did not show statistically significant differences. The application of organic byproducts of sugarcane jaggery production process improves the bulk density and the total porosity of an acid sulphate soil under greenhouse conditions.

Palavras-chave : soil aggregates; soil density; organic amendments; soil porosity.

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