03
juillet
2026
- Titre : Assessment of different Agricultural techniques on soil biological activity of olive tree in the Southern region of Tunisia
- DOI : 10.71751/JAAOGv1i1y2022-1-10
- Auteur : Haifa RAJHI; Jose Luis SANZ MARTIN; Ana MORATO; Habib BOUSNINA; MounirABICHOU
- Abstract : The climate change and water shortage have a huge drawback in the agriculture in the dry region. The case of drought was observed in the South of Tunisia in the Olive tree culture. Indeed, this degradation results from an obvious reduction in the soil activity. The plantation of the fig tree in intercalary in with Olive tree the soil plot (P4) and a soil Olive mill wastewater OMW spreading plot (P3) were involved in soil remediation in the Olive tree Field. These plots were compared with untouched soil (P1) and soil planted with Olive tree since 1900(P2). The P3 showed an important Organic Matter (2.14mg/g). However, the Soil fertility measured via Germination Index (GI) revealed an important rate (200.08 %) in P4. In contrast to the soil fertility of that P3 didn’t exceed the 60.20%. Correlation analyses between different soil parameters revealed significant trends; especially that observed by the negative correlation between respiration soil activity (Resp) and organic matter (OM) (r=-0.610, p<0.05). Indeed, a soil CO2 sequestration may take place. In addition, an important bacterial diversity revealed by Denaturing gradient gel electrophoresis DGGE molecular technique was observed in the P3. This result suggested the beneficial effects of OMW spreading on the soil bacterial biodiversity.
- Pagination : 1-10
03
juillet
2026
- Titre : Fatty acid and Antioxidant content of Chemlali extra virgin olive oil and its hydrophilic and lipophilic fractions
- DOI : 10.71751/JAAOGv1i1y2022-55-63
- Auteur : Imen GHORBEL; Mouna KHMEKHEM; Raja BEN AMAR; Naziha GRATI-KAMMOUN
- Abstract : Olive Oil is a fundamental ingredient of the Mediterranean diet for its healthy properties.
The aim of this study was to determine i) the most relevant quality parameters (Free acidity, K232, K270 and PV) of chemlali olive oil samples ii) to evaluate fatty acids and antioxidant content of chemlali olive oil and its hydrophilic (OOHF) and lipophilic (OOLF) fractions iii) to compare the chemical characterization between olive oil and its fractions. OOHF was extracted from olive oil using water by centrifugation process. OOLF was obtained by filtration process through a hydrophobic composite ceramic membrane. According to quality parameters, all our oil samples were classified in the category “extra virgin olive oil”. Our results showed that EVOO and OOLF fatty acid analyses revealed the same amount of MUFA. EVOO and OOHF contained a higher content of unsaponifiable components like polyphenols, which might contribute to olive oil’s beneficial effect. - Pagination : 55-63
03
juillet
2026
- Titre : Fatty acid composition in olive (Olea europaea. L) oil of progenies obtained from Tunisian crossbreeding program
- DOI : 10.71751/JAAOGv1i1y2022-11-23
- Auteur : Mohamed AYADI1; Fathi BEN AMAR
- Abstract : Five preselected olive progenies from a Tunisian crossing program between 'Chemlali Sfax' variety and several Mediterranean varieties were evaluated for their fatty acid composition in comparison with the original variety. These progenies were planted in a trial orchard with 4mx6m space and irrigated conditions in the experimental station ‘Ettaous’ in Sfax (Tunisia). The analysis of variance revealed significant differences among progenies for C16:0, C16:1, C18:1, C18:2 and C18:3. The Hierarchical Cluster Analysis classified the progenies into three main groups. Two groups included four olive progenies characterized mainly by high oleic and low palmitic acid contents. There were significant negative correlations between oleic acid and palmitic, palmitoleic, linoleic and linolenic acids. The principal component analysis showed that two components accounted for 75% of the total variation observed and revealed the importance of the main fatty acids 16:0, 18:1 and 18:2 in the characterization of olive progenies. The fatty acid compositions of the oils from all the progenies comply with international standards and show more beneficial characteristics than the oil obtained from ‘Chemlali Sfax’ (higher oleic acid content and lower palmitic acid content) except for hybrid 2 oil which showed an unchanged fatty acid composition. From this study, four promising progenies could be candidates for release and further investigation on minor chemical components must be undertaken.
- Pagination : 11-23
03
juillet
2026
- Titre : Impact of compost agronomic application on soil chemical properties and olive trees (Olea europaea, L) growth parameters
- DOI: 10.71751/JAAOGv1i1y2022-42-54
- Auteur : Salwa Magdich; Béchir Ben Rouina
- Abstract : The effects of compost agronomic application were evaluated in a Tunisian olive grove. Two treatments were selected: The first plot was spread by 5 T ha-1 of compost and the second plot was not amended, and served as a control during the crop season 2018/2019. This study aimed to investigate soil chemical properties, plant growth parameters, photosynthetic pigments, leaf mineral nutrient and olive oil quality of adult Chemlali olive trees subjected to compost application. The findings revealed an improvement of organic matter (39.8%), total nitrogen (41.3%), available phosphorus (24.5%) and exchangeable potassium (25.1%) soil contents, in amended plot with waste date compost compared to the control in superficial horizon (0-20 cm). In fact, a vegetative activity improvement according to the compost rate spread was noted with a shoot length increment equal to 20.42% in olive trees amended by compost. Moreover, significant raise of photosynthetic pigments contents in compost amended olive trees was noticed. The compost spreading significantly increased the mineral contents of leaves (N, P, K, Ca and Mg). Finally, the oil quality parameters did not show any significant difference. With the only exception of the phenol content, this was significantly higher in the oils extracted from compost amended olive trees than the control.
- Pagination : 42-54
