Controlled-release fertilizers combined with Pseudomonas fluorescens rhizobacteria inoculum improve growth in Pinus halepensis seedlings
Jose Alfonso Dominguez-Nuñez (1) , Daniel Delgado-Alvez (1), Marta Berrocal-Lobo (1), Analía Anriquez (2), Ada Albanesi (2)
iForest - Biogeosciences and Forestry, Volume 8, Issue 1, Pages 12-18 (2015)
doi: https://doi.org/10.3832/ifor1110-007
Published: May 12, 2014 - Copyright © 2015 SISEF
Research Articles
Abstract
Pinus halepensis seedlings are currently used to regenerate arid Mediterranean regions. Optimized methods for seedling fertilization in nurseries improve plant growth and are essential for successful reforestation. Previously, we showed that inoculation of P. halepensis seedlings with Pseudomonas fluorescens CECT 844 rhizobacteria improved plant growth and N uptake. The aim of this study was to determine the physiological and morphological response of P. halepensis seedlings to a combined treatment including controlled-release fertilization and inoculation with the rhizobacterium P. fluorescens. P. halepensis seedlings were grown in a nursery under well-watered conditions and were fertilized (F), inoculated with P. fluorescens (Ps) or fertilized and inoculated (F x Ps). Growth and water parameters (osmotic potential at both full and zero turgor and modulus of elasticity) were measured in seedlings under each treatment. The total N, P, K, Ca, Mg and Fe contents and concentrations in seedling roots and shoots were also measured. Finally, root growth potential was estimated. F x Ps increased both seedling growth and nutrient uptake compared with the independent treatments. Interestingly, amendment with rhizobacteria had a slight negative effect on osmotic potential and P uptake, which was lessened by combining Ps with F. The present work shows that F x Ps is highly efficient for improving the quality of forest seedlings in nurseries. As such, F x Ps represents a potential alternative treatment that could reduce contaminant emissions and increase microbiota soil regeneration in degraded soils.
Keywords
Controlled-release Fertilization, Rhizobacteria, Pinus halepensis, Water Parameters, Mineral Nutrition, Nursery, Root Growth Potential, Osmotic Potential
Authors’ Info
Authors’ address
Daniel Delgado-Alvez
Marta Berrocal-Lobo
E.T.S.I Montes & E.U.I.T Forestal, Polytechnic University of Madrid, Av/da Ciudad Universitaria s/n, E-28040 Madrid (Spain)
Ada Albanesi
Faculty of Agronomy & Agroindustries, National University of Santiago del Estero, Av/da Belgrano (S) 1912, 4200 Santiago del Estero (Argentina)
Corresponding author
Paper Info
Citation
Dominguez-Nuñez JA, Delgado-Alvez D, Berrocal-Lobo M, Anriquez A, Albanesi A (2015). Controlled-release fertilizers combined with Pseudomonas fluorescens rhizobacteria inoculum improve growth in Pinus halepensis seedlings. iForest 8: 12-18. - doi: 10.3832/ifor1110-007
Academic Editor
Roberto Tognetti
Paper history
Received: Aug 20, 2013
Accepted: Dec 26, 2013
First online: May 12, 2014
Publication Date: Feb 02, 2015
Publication Time: 4.57 months
Copyright Information
© SISEF - The Italian Society of Silviculture and Forest Ecology 2015
Open Access
This article is distributed under the terms of the Creative Commons Attribution-Non Commercial 4.0 International (https://creativecommons.org/licenses/by-nc/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
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