USE OF ORGANIC RESIDUES FOR THE RECOVERY OF SOIL AND ENVIRONMENTAL SUSTAINABILITY

Antonia Galvez, Tania Sinicco, Maria Luz Cayuela, Maria Dolores Mingorance, Flavio Fornasier, Claudio Mondini

Abstract


The aim of this work was to investigate the effects of different organic residues on soil fertility and climate change, through the evaluation of soil organic matter mineralisation, greenhouse gas emission, nutrient availability and soil microbial biomass content and activity. A degraded agricultural soil was amended with three different organic residues (pig slurry digestate, rapeseed meal, and compost) at three different doses (0.1, 0.25 and 0.5% w/w) and incubated for 30 days at 20 ºC. During incubation, soil CO2 and N2O emissions, K2SO4 extractable organic C, N, NH4+, NO3- and P, soil microbial biomass and some enzymatic activities were determined. Results obtained showed that rapeseed meal and pig slurry are best suited to improve soil chemical and biological fertility, while compost is more appropriate for the enhancement of soil organic matter content and to promote soil C sequestration.


Keywords


organic residues; mineralisation; C sequestration; N2O emissions; soil organic matter

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References


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DOI: 10.6092/issn.2281-4485/3831

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Copyright (c) 2011 Antonia Galvez, Tania Sinicco, Maria Luz Cayuela, Maria Dolores Mingorance, Flavio Fornasier, Claudio Mondini

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