Decomposition and substrate quality of leaf litters and fine roots from three exotic plantations and a native forest in the southwestern highlands of Ethiopia

Decomposition and substrate quality of leaf litters and fine roots from three exotic plantations and a native forest in the southwestern highlands of Ethiopia

12 páginas, 3 figuras, 4 tablas, 46 referencias.-- cmartin@irnase.csic.es

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Bibliographic Details
Main Authors: Bekele, Lemma, Nilsson, Igvar, Kleja, Dan Berggren, Olsson, Matts, Knicker, Heike
Other Authors: Swedish International Development Corporation Agency
Format: artículo biblioteca
Language:English
Published: Elsevier 2007-09
Subjects:Substrate quality, Leaf litter, Fine roots, CO2-C mineralisation, Tree species, CPMAS 13C NMR,
Online Access:http://hdl.handle.net/10261/82445
http://dx.doi.org/10.13039/501100009698
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spelling dig-irnas-es-10261-824452022-04-22T06:07:14Z Decomposition and substrate quality of leaf litters and fine roots from three exotic plantations and a native forest in the southwestern highlands of Ethiopia Bekele, Lemma Nilsson, Igvar Kleja, Dan Berggren Olsson, Matts Knicker, Heike Swedish International Development Corporation Agency Hawassa University Substrate quality Leaf litter Fine roots CO2-C mineralisation Tree species CPMAS 13C NMR 12 páginas, 3 figuras, 4 tablas, 46 referencias.-- cmartin@irnase.csic.es Substrate quality and decomposition (measured as CO2 release in laboratory microcosms) of fresh leaf litter and fine roots of Cupressus lusitanica, Pinus patula, Eucalyptus grandis and native forest trees were studied. Changes in litter chemistry in each forest stand were analysed by comparing fresh leaf litter (collected from trees) and decomposed litter from the forest floor. Elemental concentrations, proximate fractions including monomeric sugars, and cross polarisation magic-angle spinning (CPMAS) 13C NMR spectra were analysed in leaf litters, decomposed litter and fine roots. Leaf litters and fine roots varied in their initial substrate chemistry with Ca concentration in leaf litters being higher than that in fine roots. In each stand, fine roots had a higher acid unhydrolysable residue (AUR) (except for the Pinus stand), higher holocellulose concentration and lower concentration of water-soluble extractives (WSE) and dichloromethane extractives (NPE) than fresh leaf litter. Likewise, 13C NMR spectra of fine roots showed lower alkyl and carboxyl C, and higher phenolic (except P. patula), aromatic and O-alkyl C proportions than leaf litters. Compared with fresh leaf litter, decomposed litter had lower concentrations of potassium, holocellulose, WSE, NPE, arabinose and galactose, similar or higher concentrations of Mg, Ca, S and P, and higher concentrations of N and AUR. CPMAS 13C NMR spectra of decomposed litter showed a higher relative increase in signal intensity due to methoxyl C, aromatic C, phenolic C and carboxylic C compared with alkyl C. In a microcosm decomposition study, the proportion of initial C remaining in leaf litter and fine roots significantly fitted an exponential regression model. The decomposition constants (k) ranged between 0.0013 and 0.0030 d−1 for leaf litters and 0.0010–0.0017 d−1 for fine roots. In leaf litters there was a positive correlation between the k value and the initial Ca concentration, and in fine roots there was an analogous positive correlation with initial WSE. Leaf litters decomposed in the order Cupressus>native forest>Eucalyptus∼Pinus, and fine roots in the order Pinus>native forest>Cupressus∼Eucalyptus. In each stand the fine root decomposition was significantly lower than the leaf litter decomposition, except for the P. patula stand where the order was reversed. This study was supported by the Swedish International Development Agency and Wondo Genet College of Forestry. Peer reviewed 2013-09-20T09:11:47Z 2013-09-20T09:11:47Z 2007-09 artículo http://purl.org/coar/resource_type/c_6501 Soil Biology and Biochemistry 39 (9): 2317–2328 (2007) 0038-0717 http://hdl.handle.net/10261/82445 10.1016/j.soilbio.2007.03.032 http://dx.doi.org/10.13039/501100009698 en http://dx.doi.org/10.1016/j.soilbio.2007.03.032 none Elsevier
institution IRNAS ES
collection DSpace
country España
countrycode ES
component Bibliográfico
access En linea
databasecode dig-irnas-es
tag biblioteca
region Europa del Sur
libraryname Biblioteca del IRNAS España
language English
topic Substrate quality
Leaf litter
Fine roots
CO2-C mineralisation
Tree species
CPMAS 13C NMR
Substrate quality
Leaf litter
Fine roots
CO2-C mineralisation
Tree species
CPMAS 13C NMR
spellingShingle Substrate quality
Leaf litter
Fine roots
CO2-C mineralisation
Tree species
CPMAS 13C NMR
Substrate quality
Leaf litter
Fine roots
CO2-C mineralisation
Tree species
CPMAS 13C NMR
Bekele, Lemma
Nilsson, Igvar
Kleja, Dan Berggren
Olsson, Matts
Knicker, Heike
Decomposition and substrate quality of leaf litters and fine roots from three exotic plantations and a native forest in the southwestern highlands of Ethiopia
description 12 páginas, 3 figuras, 4 tablas, 46 referencias.-- cmartin@irnase.csic.es
author2 Swedish International Development Corporation Agency
author_facet Swedish International Development Corporation Agency
Bekele, Lemma
Nilsson, Igvar
Kleja, Dan Berggren
Olsson, Matts
Knicker, Heike
format artículo
topic_facet Substrate quality
Leaf litter
Fine roots
CO2-C mineralisation
Tree species
CPMAS 13C NMR
author Bekele, Lemma
Nilsson, Igvar
Kleja, Dan Berggren
Olsson, Matts
Knicker, Heike
author_sort Bekele, Lemma
title Decomposition and substrate quality of leaf litters and fine roots from three exotic plantations and a native forest in the southwestern highlands of Ethiopia
title_short Decomposition and substrate quality of leaf litters and fine roots from three exotic plantations and a native forest in the southwestern highlands of Ethiopia
title_full Decomposition and substrate quality of leaf litters and fine roots from three exotic plantations and a native forest in the southwestern highlands of Ethiopia
title_fullStr Decomposition and substrate quality of leaf litters and fine roots from three exotic plantations and a native forest in the southwestern highlands of Ethiopia
title_full_unstemmed Decomposition and substrate quality of leaf litters and fine roots from three exotic plantations and a native forest in the southwestern highlands of Ethiopia
title_sort decomposition and substrate quality of leaf litters and fine roots from three exotic plantations and a native forest in the southwestern highlands of ethiopia
publisher Elsevier
publishDate 2007-09
url http://hdl.handle.net/10261/82445
http://dx.doi.org/10.13039/501100009698
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