Journal
BIORESOURCE TECHNOLOGY
Volume 98, Issue 17, Pages 3213-3220Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2006.07.006
Keywords
composting; pine bark; eucalyptus bark; enzymatic activities; substrates
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To study the possibility of some residues from pulp and paper industry being used as substrates to produce seedlings in containers, three composting experiments were carried out using eucalyptus bark, pine bark and a mixture (60:40, v:v) of pine bark + eucalyptus bark. Biochemical parameters studied were: acid and alkaline phosphatases, lipase (C10), protease, urease, beta-glucosidase and total cellulases. The microbiological populations of total aerobic bacteria, total fungi, actinomycetes, nitrifying bacteria, cellulolytic bacteria and fungi were also evaluated. At the end of the process physicochemical characterization of composts was also performed. Results showed in general that the highest microbiological populations as well as for enzymatic activities occurred during the thermophilic phase (> 40 degrees C) of the process. On the other hand and according to the physicochemical characteristics of composts pine bark is the most appropriate material to be used in the formulation of substrates to produce plants in containers. (c) 2006 Elsevier Ltd. All rights reserved.
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