alexa Agronomic Application of Olive Mill Wastewater with Rock Phosphate Influence Soil Phosphorus Availability, Arbuscular Mycorrhizal Fungal Colonisation and Olive Tree Performance under Long-Term Field Conditions
ISSN: 2161-0525

Journal of Environmental & Analytical Toxicology
Open Access

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Research Article

Agronomic Application of Olive Mill Wastewater with Rock Phosphate Influence Soil Phosphorus Availability, Arbuscular Mycorrhizal Fungal Colonisation and Olive Tree Performance under Long-Term Field Conditions

Beligh Mechri1*, Meriem Tekaya1, Hechmi Cheheb2, Mohamed Hammami1 and Faouzi Attia3,4
1Laboratory of Biochemistry, USCR Mass Spectrometry, LR-NAFS/LR12ES05 LR12ES05 Nutrition Functional Foods and Vascular Health, Faculty of Medicine, University of Monastir, 5019 Monastir, Tunisia
2The Olive Tree Institute , Unit Specializing in Sousse, Rue Ibn Khaldoun, B.P. 14, 4061 Sousse, Tunisia
3Equipe Agricultural Research, Agronutrition, Carbon, France
4LabCom C2R-BIONUT, Toulouse, France
Corresponding Author : Beligh Mechri
Laboratory of Biochemistry
USCR Mass Spectrometry
LR-NAFS/LR12ES05 LR12ES05 Nutrition Functional Foods and vascular health
Faculty of Medicine, University of Monastir
5019 Monastir, Tunisia
Tel: +216 73 462 200
Fax: + 216 73 460 737
E-mail: [email protected]
Received May 15, 2015; Accepted June 04, 2015; Published June 06, 2015
Citation: Mechri B, Tekaya M, Cheheb H, Hammami M, Attia F (2015) Agronomic Application of Olive Mill Wastewater with Rock Phosphate Influence Soil Phosphorus Availability, Arbuscular Mycorrhizal Fungal Colonisation and Olive Tree Performance under Long-Term Field Conditions. J Environ Anal Toxicol 5:300. doi:10.4172/2161-0525.1000300
Copyright: © 2015 Mechri B, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
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Abstract

The use of organic acids and phenolic compounds that are present in olive mill wastewater (OMW) represents a new perspective in rock phosphate (RP) research and a possible solution for the recycling of the OMW. To test the hypothesis that OMW applied in combination with Gafsa RP to olive tree plants can affect P mobilisation from RP to olive trees, a field experiment was conducted to evaluate the potential use of OMW with RP as soil amendment on olive tree alkaline soils. Treatment included three levels of OMW and RP application: M0 (non-amended control), M1PN (30 m3 ha-1 of OMW+150 kg ha-1 of RP) and M2PN (60 m3 ha-1 of OMW+150 kg ha-1 of RP). Five years after the start of the experiment, the available phosphorus decreased significantly. Amended olive trees had lower rate of photosynthates compared to the control, mostly due to decreased sink demand for carbon by the root. The biomass of arbuscular mycorrhizal (AM) fungi and the development of colonisation in the olive tree roots decreased dramatically by the application of OMW and RP. Phenols accumulation in leaves was significantly higher in the OMW and RP amended soils, whereas total chlorophyll, chlorophyll a, and chlorophyll b in olive trees leaves decreased significantly after agronomic application of OMW and RP. Taken with data from experiments in field conditions, our results suggest that the use of OMW in combination with RP, in order to mobilise P from RP to olive trees, are expected to have a major negative impact on plant performance.

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