دراسة تأثير الري بالمياه المستعملة على النمو النباتي لأشجار الزيتون و على الخصائص الفيزيائية و الكيميائية للتربة

الملخص EN

In arid and semi-arid regions, scarcity of good-quality water resources due to human, industrial, and agricultural consumptionisa great concern.Hence, the reuse of wastewater could be a realistic way to reduce water shortage.

Thus, this study was conducted for a year on olive trees cv.

Chemlali in afield located in the eastern center of Tunisia, using drip irrigation.

The trees were irrigated with untreated wastewater (UWW) from poultry meat and its derivatives factory located near the site of the study.

Physico-chemical parameters of water and soil were determined using Pastel UV by Secomam.

Growth parameters’ values (plant height, trunk diameter, the number and the length of branches, and total polyphenols) were measured.

Results were compared to olive trees irrigated with tap water (TW).

Results of wastewater physico-chemical analysis showed a high concentration on suspended solids, chemical oxygen demand, biochemicaloxygen demand, total organic carbon, and electricalconductivity.

High growth parameters values (plant height and trunk diameter) were recorded in the UWWgroup as opposed to the TW group which recorded a high concentration on total leaves polyphenols.The comparison of results before and after irrigationdid not show a statistical difference in soil properties (soil pH, potassium amount, and active lime ratio) in both groups TW and UWW.For electrical conductivity and phosphorus percentage, a significant increase was recordedin the UWW groupaccompanied witha decrease in the proportion of organic matter.