Enhancing growth of mangrove seedlings in the environmentally extreme Arabian Gulf using treated sewage sludge.

Autor: Erftemeijer PLA; The UWA Oceans Institute and School of Biological Sciences, University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia. Electronic address: paul.erftemeijer@uwa.edu.au., Cambridge ML; The UWA Oceans Institute and School of Biological Sciences, University of Western Australia, 35 Stirling Highway, Crawley, WA 6009, Australia., Price BA; School of Molecular and Life Sciences, Curtin University, Bentley, Western Australia 6102, Australia., Ito S; Abu Dhabi Oil Co. Ltd (Japan), P.O. Box 630, Abu Dhabi, United Arab Emirates., Yamamoto H; Abu Dhabi Oil Co. Ltd (Japan), P.O. Box 630, Abu Dhabi, United Arab Emirates., Agastian T; Abu Dhabi Oil Co. Ltd (Japan), P.O. Box 630, Abu Dhabi, United Arab Emirates., Burt JA; Water Research Center, New York University Abu Dhabi, P.O. Box 129188, Abu Dhabi, United Arab Emirates.
Jazyk: angličtina
Zdroj: Marine pollution bulletin [Mar Pollut Bull] 2021 Sep; Vol. 170, pp. 112595. Date of Electronic Publication: 2021 Jun 11.
DOI: 10.1016/j.marpolbul.2021.112595
Abstrakt: The response of mangrove (Avicennia marina) seedlings to treated (wet) sludge from a sewage treatment plant (STP) was tested in a randomized block design experiment at a tree nursery on Mubarraz Island in the Arabian Gulf. The growth response of seedlings to half-strength and full-strength STP sludge was monitored over 103 days and compared with the response to freshwater, seawater and half-strength seawater treatments. Sludge treatments resulted in significantly greater plant growth, leaf number, leaf biomass and root biomass than the other treatments did. The positive effect of STP sludge on seedling growth is attributed to enhanced levels of total nitrogen (8.9 ± 0.1 mg l -1 ) and total phosphorus (7.8 ± 0.2 mg l -1 ) in the sludge and its low salinity. These results suggest that sludge from sewage treatment plants may be beneficially used in mangrove nurseries and plantations in this arid region, where soils are nutrient-poor and fresh water is scarce.
(Copyright © 2021 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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