期刊
WASTE MANAGEMENT
卷 79, 期 -, 页码 1-7出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.wasman.2018.07.019
关键词
Forest residues; Hydrothermal treatment; Phytotoxicity; Microbial activity; Growing media
资金
- Caixa Geral de Depositos (CGD)
- Instituto Superior de Agronomia (ISA)
- Fundacao para a Ciencia e Tecnologia (FCT) [UID/AGR/04129/2013, UID/AGR/00239/2013]
- PDR2020 Program [PDR2020-101-031058, 112, 237]
The use of industrial Eucalyptus globulus bark residues for organic growing media formulation was studied. Hydrothermal treatments were tested using Response Surface Methodology approach. Model design consisted of twelve combinations of temperature (T: 60-140 degrees C) and residential time (t: 20-60') to evaluate the effect on bark properties. Temperature had a significant effect in C mineralization and N immobilization rates, where the lowest responses (111.8 mmol CO2 kg(-1) d(-1) and NIR = 4.1 mmol N kg(-1) d(-1), respectively) compared to IEB (214.6 mmol CO2 kg(-1) d(-1) and 8.9 N kg(-1) d(-1), respectively) were suggested after modeling at 40 degrees C during 70'. Industrial bark was phytotoxic and treatments were effective for phytotoxicity removal. Industrial bark presented high air content but low water availability; treatments had no effect on bark physical properties and the use of demineralized water may have leached nutrient content. Results from pot experiment recommend the use of 25% (v v(-1)) of treated barks in future growing media formulations. (C) 2018 Elsevier Ltd. All rights reserved.
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