Record ID No. |
2045 |
Author(s) |
Mechri B., BenMariem F., Baham M., BenElhadj S., Hammami M , 2008 |
Affiliation |
Faculty of Medicine, UR Nutr & Desordres Metab, USCR Spect Masse, Biochim Lab, Monastir, TUNISIA |
Title |
Change in soil properties and the soil microbial community following land spreading of olive mill wastewater affects olive trees key physiological parameters and the abundance of arbuscular mycorrhizal fungi |
Source. Vol.(no):Page |
Soil Biology & Biochemistry.40(1):152-161p. |
Categories |
Mycorrhiza General |
Subjects |
Biochemistry |
Sub-subjects |
Miscellaneous |
Organism |
n.a. |
Country |
TUNISIA, Africa |
Abstracts |
Olive mill wastewater (OMW) constitutes a major environmental problem for
Mediterranean countries, where most of the world olive oil production takes place. The recycling
of the OMW and its use as water for irrigation in agriculture, provided that its impact on soil
and plant is established, is an attractive possibility for the Mediterranean countries.
Investigations were performed on the influence of agronomic application of OMW (amount applied:
30, 60, 100 and 150 m(3) ha(-1)) in a field of olives trees on trees characters (photosynthesis,
root-soluble carbohydrate and root colonisation), soil properties, and soil microbial community
structure. Specific attention was paid to arbuscular mycorrhizal (AM) fungi. The soil fatty acid
methyl ester (FAME) 16:1 omega 5 was used to quantify biomass of AM fungi and the root FAME 16:1
omega 5 analysis was used as index for the development of colonisation in the olive trees roots.
A significant increase in organic C, C/N ratio, extractable phosphorus and exchangeable potassium
was found after one year of agronomic application of OMW. The development of saprophytic fungi
was significantly higher in the OMW amended soils, whereas the abundance of the soil FAME 16:1
omega 5, root FAME 16:1 omega 5, photosynthetic rates and the amount of the total root-soluble
carbohydrate were decreased sianificantly after agronomic application of OMW. A principal
component analysis (PCA) of the trees characteristics profiles showed discrimination between the
nonirrigated and the OMW irrigated olive trees. These findings suggest that the altering
functioning of arbuscular mycorrhizas should be considered as potential factors mediating olive
trees responses to agronomic application of OMW when the OMW dose applied is higher than 30 in 3
ha-1. To our knowledge, this is the first report of alterations in the soil FAME 16:1(05 and root
FAME 16:1 omega 5 due to land spreading of OMW. (c) 2007 Elsevier Ltd. All rights reserved. |