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Publication Type J
Authors Caravaca, F., M. M. Aiguacil, P. Torres and A. Roldan
Title Plant type mediates rhizospheric microbial activities and soil aggregation in a semiarid Mediterranean salt marsh
Source Geoderma
Author Keywords halophyte; microbial biomass; enzyme activity; labile C fractions; aggregate stability; salt marsh arbuscular mycorrhizal fungi; stability; inoculation; degradation; phosphatase; extraction; indicators; infection; nitrogen; refuse
Abstract This study was carried out in a Mediterranean salt marsh from semiarid Southeastern Spain, to determine the influence of eight halophytes (Asteriscus maritimus (L.) Less., Arthrocnenium macrostachyum (Moric.) Moris, Frankenia corymbosa Desf., Halimione portulacoides (L.) Aellen, Limonium cossonianum O. Kuntze. Limonium caesium (Girard) O. Kuntze, Lygeum spartum L., and Suaeda vera Forsskal ex J.F. Gmelin growing in a homogeneous area with regard to salt content, on the rhizosphere soil microbiological and biochemical properties (labile C fractions. biomass C. oxidoreductases and hydrolases) and aggregate stabilisation. Rhizosphere soil of H. portulacoides showed the highest values of water-soluble C. water-soluble carbohydrates, microbial biomass C and dehydrogenase, urease, protease-BAA and acid phosphatase activities. S. vera had the lowest microbial activity. The soil under A. maritimus, L. cossonianum: L. spartum and H. portulacoides had the highest percentages of stable aggregates (on average, about 52%) and the soil under S. vera the lowest (about 27% of stable aggregatess). There was a good correlation between enzyme activities, the C-biomass. root colonisation of the eight halophytes and the levels of stable aggregates. Our results suggest that soil microbial activity and soil properties related to microbial activity, such as aggregate stability, are deter-mined by the type of the halophytic Species. (C) 2004 Elsevier B.V. All rights reserved.
Author Address CSIC, Ctr Edafol & Biol Aplicada Segura, Dept Soil & Water Conservat, POB 164,Campus Espinardo, Murcia 30100, Spain CSIC, Ctr Edafol & Biol Aplicada Segura, Dept Soil & Water Conservat, Murcia 30100, Spain Univ Miguel Hernandez Elche, Dept Appl Biol, Alicante, Spain Caravaca F CSIC, Ctr Edafol & Biol Aplicada Segura, Dept Soil & Water Conservat, POB 164,Campus Espinardo, Murcia 30100, Spain
29-Character Source Abbreviation Geoderma
Publication Date Feb
Year Published 2005
Volume 124
Issue 3-4
Beginning Page 375-382
Unique Article Identifier ISI:000226447100012
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