To the top

Page Manager: Webmaster
Last update: 9/11/2012 3:13 PM

Tell a friend about this page
Print version

Nutrient resorption effic… - University of Gothenburg, Sweden Till startsida
To content Read more about how we use cookies on

Nutrient resorption efficiency and proficiency in economic wood trees irrigated by treated wastewater in desert planted forests

Journal article
Authors Emad Farahat
Hans W. Linderholm
Published in Agricultural Water Management
Volume 155
Pages 67-75
ISSN 0378-3774
Publication year 2015
Published at Department of Earth Sciences
Pages 67-75
Language en
Keywords Desert forests, Wastewater, Senesced leaves, Stoichiometric ratios, Resorption efficiency and, HEAVY-METALS, SEMIARID GRASSLAND, MINERAL-CONTENT, SEWAGE-SLUDGE, NITROGEN, CHINA, SOIL, PATTERNS, LEAVES, STOICHIOMETRY, Agronomy, Water Resources
Subject categories Agricultural Science


Little is known about the impacts of recycled wastewater irrigation on adult tree species, especially the nutrient resorption efficiency (RE) and proficiency (RP) during leaf senescence and whether trace metals are resorbed or not during this process. Here, we present a study on the concentrations of nutrients and trace metals in green and senesced leaves, collected from Eucalyptus camaldulensis and Casuarina spp., in four planted forests irrigated by wastewater (or groundwater as control). Stoichiometric ratios (C:N, C:P, and N:P), RE and RP from senesced leaves of the trees were investigated. The concentrations of trace metals showed normal levels and were below phytotoxic concentrations in green and senesced leaves except for Mn. The intra-specific variations in nutrient concentrations in senesced leaves showed larger differences among the sites than those found in green leaves. The studied tree species excluded excess elements by decreasing its proficiency. The RE for N and P was high under poor soil nutrient conditions, but very low under high availability of nutrients. Resorption of trace metals from senesced leaves was low and presented negative mean values for most metals at all sites. RP values were low or equal to zero for the estimated elements. C:N and C:P ratios were high at low nutrient availability i.e. control site, while N:P ratios were non-significant among sites in green or senesced leaves. Our results illustrate that forest trees have highly variable nutrient resorption capacities that vary under high nutrients availability and indicate that under continuous wastewater irrigation, low or negative resorption efficiency for trace metals and other nutrients is an efficient protective strategy. (C) 2015 Elsevier B.V. All rights reserved.

Page Manager: Webmaster|Last update: 9/11/2012

The University of Gothenburg uses cookies to provide you with the best possible user experience. By continuing on this website, you approve of our use of cookies.  What are cookies?