Use este identificador para citar ou linkar para este item: https://locus.ufv.br//handle/123456789/23086
Tipo: Artigo
Título: Microalgae biofilm in soil: Greenhouse gas emissions, ammonia volatilization and plant growth
Autor(es): Castro, Jackeline de Siqueira
Calijuri, Maria Lúcia
Assemany, Paula Peixoto
Cecon, Paulo Roberto
Assis, Igor Rodrigues de
Ribeiro, Vinícius José
Abstract: Microalgal biofilm in soils represents an alternative fertilization method for agricultural sustainability. In the present study, greenhouse gas emission, soil ammonia volatilization, and the growth of Pennisetum glaucum were evaluated under the effect of a microalgal biofilm, commercial urea, and a control (without application of a nitrogen source). CH4 emissions were equal for the three treatments (p > 0.05). CO2 emissions significantly increased in microalgal biofilm treatment (p < 0.01), which was also responsible for the highest N2O emissions (p < 0.01). The ammonia (NNH3) volatilization losses were 4.63%, 18.98%, and 0.82% for the microalgal biofilm, urea, and control treatments, respectively. The main differences in soil characteristics were an increase in nitrogen and an increase in cation exchange capacity (p < 0.01) caused by the algal biomass application to the soil. The soil organic matter content significantly differed (p < 0.05) among the three treatments, with the microalgal biofilm treatment having the greatest increase in soil organic matter. Significant differences were observed for shoot dry matter mass and nitrogen content in the plants from both treatments where nitrogen sources were applied. All treatments differed from each other in leaf dry matter mass, with the urea treatment increasing the most. Chlorella vulgaris was the dominant microalgal specie in the soil.
Palavras-chave: Algal biomass
Nutrient recovery
Greenhouse gas fluxes
Ammonia volatilization
Editor: Science of The Total Environment
Tipo de Acesso: 2016 Elsevier B.V. All rights reserved.
URI: https://doi.org/10.1016/j.scitotenv.2016.08.205
http://www.locus.ufv.br/handle/123456789/23086
Data do documento: 1-Jan-2017
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