JEB logo

Journal of Environmental Biology

pISSN: 0254-8704 ; eISSN: 2394-0379 ; CODEN: JEBIDP

About Journal
    Editorial Board
    Reviewer Panel
    RnD Division
    Subscription Info
    Contact Journal
 
Read Journal
    Current Issue
    Journal Archives
 
For Authors
    Authoring Guidelines
    Publication Process
    Track Paper Status
 
Announcements
    JEB Award
 

Search the Journal web-site through Google:


        Abstract - Issue Jan 2009, 30 (1)                                                                                                             Back



Interactions between marine facultative epiphyte Chlamydomonas sp

Nitrogen fixation capacity of Azotobacter spp. strains isolated from soils in different ecosystems and relationship between them and the microbiological properties of soils

 

Ridvan Kizilkaya*

Department of Soil Science, Faculty of Agriculture, Ondokuz Mayis University, 55139 Samsun, Turkey

(Received: August 11, 2007; Revised received: December 28, 2007; Accepted: January 10, 2008)

Abstract: The objectives of this study were to count and culture Azotobacter spp. in sampled soils, to determine the nitrogen (N) fixing capacity by Azotobacter spp. in pure culture and different soils, and to explore the relationships between N fixation capacity of Azotobacter spp. and microbiological properties of soils in Northern Anatolia, Turkey. Statistically significant relationships were found between the population of Azotobacter spp. in soils and microbial biomass C (Cmic), dehydrogenase (DHA), b-glucosidase (GA), alkaline phosphatase (APA) and arylsulphatase (ASA) activities. However, relationships between the population of Azotobacter spp. and basal soil respiration (BSR), urease (UA) and catalase (CA) activities were insignificant. The N fixation capacities of native 3 day old Azotobacter chroococcum strains added to Ashby Media varied from 3.50 to 29.35 mg N ml-1 on average 10.24. In addition, N fixation capacities of Azotobacter spp. strains inoculated with clayey soil, loam soil, and sandy clay loam soil during eight week incubation period were 4.78-15.91 mg N g-1, 9.03-13.47 mg N g-1 and 6.51-16.60 mg N g-1, respectively. It was concluded that the most N fixation by Azotobacter spp. was in sandy clay loam soils.

Key words: Azotobacter spp., Soil, Texture, N fixation, Microbiological properties

PDF of full length paper is available with author (*ridvank@omu.edu.tr)

 

Copyright 2009 Triveni Enterprises. All rights reserved. No part of the Journal can be reproduced in any form without prior permission. Responsibility regarding the authenticity of the data, and the acceptability of the conclusions enforced or derived, rest completely with the author(s).