Microalgae biofilm in soil: Greenhouse gas emissions, ammonia volatilization and plant growth.

Autor: Castro JS; Department of Civil Engineering, Federal University of Viçosa (Universidade Federal de Viçosa), Viçosa Campus, 36570-900, Brazil. Electronic address: jackeline.castro@ufv.br., Calijuri ML; Department of Civil Engineering, Federal University of Viçosa (Universidade Federal de Viçosa), Viçosa Campus, 36570-900, Brazil. Electronic address: lucia.calijuri@gmail.com., Assemany PP; Department of Civil Engineering, Federal University of Viçosa (Universidade Federal de Viçosa), Viçosa Campus, 36570-900, Brazil. Electronic address: paula_assemany@hotmail.com., Cecon PR; Department of Statistics, Federal University of Viçosa (Universidade Federal de Viçosa), Viçosa Campus, 36570-900, Brazil. Electronic address: cecon@ufv.br., de Assis IR; Department of Soil Science, Federal University of Viçosa (Universidade Federal de Viçosa), Viçosa Campus, 36570-900, Brazil. Electronic address: igor.assis@ufv.br., Ribeiro VJ; Department of Soil Science, Federal University of Viçosa (Universidade Federal de Viçosa), Viçosa Campus, 36570-900, Brazil. Electronic address: vinicius.j.ribeiro@ufv.br.
Jazyk: angličtina
Zdroj: The Science of the total environment [Sci Total Environ] 2017 Jan 01; Vol. 574, pp. 1640-1648. Date of Electronic Publication: 2016 Sep 07.
DOI: 10.1016/j.scitotenv.2016.08.205
Abstrakt: 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). CH 4 emissions were equal for the three treatments (p>0.05). CO 2 emissions significantly increased in microalgal biofilm treatment (p<0.01), which was also responsible for the highest N 2 O emissions (p<0.01). The ammonia (NNH 3 ) 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.
(Copyright © 2016 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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