Abstract

ACOSTA SOTELO, Laura Liliana et al. Bagasse and compost of tequila agave bagasse in contrasting soils: 2. Dynamics of carbon and nitrogen mineralization. Biotecnia [online]. 2023, vol.25, n.2, pp.5-11.  Epub Aug 25, 2023. ISSN 1665-1456.  https://doi.org/10.18633/biotecnia.v25i2.1802.

The study of the mineralization process of bagasse and bagasse compost (by-products from the production of tequila) allows predicting their effects on soil fertility upon their incorporation. The objective of the study was to evaluate the mineralization process of the remaining organic carbon (COR), N remaining nitrogen (NR) and Carbon/nitrogen ratio (C/N), in four materials autoclave bagasse (BA), diffuser bagasse (BD), autoclaved bagasse compost (CBA), and diffuser bagasse compost (CBD), in contrasting soils (regosol and luvisol), by the decomposition bag method. After one year of evaluation, the variables showed significant differences between organic waste (OR) and soils. It was found that the absolute amount of COR gradually decreased in the bagasse throughout the year, while the amount of NR did not decrease significantly, so, an evident C/N ratio reduction was observed. These variables in the composts remained partially stable during the mineralization process. Therefore, both materials can be added to the soil, but with different objectives; in the case of compost, they can be incorporated into the soil, while in the case of bagasse it is only advisable to deposit them over soil surface.

Keywords : Regosols; luvisols; organic by-products; chemical composition.

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