Faculté des Sciences Biologiques et des Sciences Agronomiques

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Influence of ovulation induction methods on the success of artificial insemination in rabbits does of the synthetic strain
(2019-06-26) Boudour. K; Aichouni .A; Lankri .E; Zerrouki Daoudi .N
The objective of the study is to determine the impact of applying different stimulation modes in rabbits to achieve fertile insemination (positive palpation). A total of 30 rabbits of the synthetic strain aged 6.5±1.4 months, with an average weight of 3607.2 ±241.6 g, were divided into three experimental batches (10 rabbits/batch), according to the stimulation method used: hormonal (either GnRH or PMSG) and mechanical stimulation by the use of sterile males. The effect of stimulation method used on the reproductive parameters of does conducted in AI, was analyzed during the three consecutive reproduction cycles, and define the most reliable and cost-effective method recommend to improve the fertility and productivity of females. They monitored and their reproductive parameters recorded. Receptivity of rabbits before insemination recorded. All data obtained from three reproductive cycles revealed that, apart from stillbirth, other reproductive parameters not affected by the ovulation induction methods.
Biologie de la mouche méditerranéenne des fruits Ceratitis capitata Wied, 1824 (Diptera ; Trypetidae) en Kabylie.
(2019-06-26) SADOUDI-ALI AHMED, Djamila
A partir des pupes obtenues de différentes variétés fruitières de la Kabylie, nous avons suivi les paramètres de la cératite à savoir le poids des pupes, la durée de pupaison, le taux d’émergence, le sex-ratio et la longévité des adultes. Les résultats obtenus ont révélé que le poids initial d’une pupe varie selon les espèces fruitières étudiées. La durée de pupaison diffère selon les espèces et les variétés fruitières. Plus de 50 % de pupes ont donné des adultes sur les deux variétés d’abricot et de pêche alors que les variétés d’oranger sont celles qui ont donné très peu d’adultes. Par ailleurs, le sex-ratio varie selon la variété de fruits. Enfin, les femelles et les mâles de la cératite ont montré des longévités importantes sur les agrumes.
INTRODUCTION ET PRODUCTION DES POISSONS D’EAU DOUCE EN ALGERIE
(2019-07-02) LOUNACI-DAOUDI, Dhya; LOUNACI, Abdelkader
Depuis les années 2000, l’Algérie a intensifié ses efforts pour renforcer le secteur de la pêche et des ressources halieutiques et garantir l’efficacité de la stratégie de gestion durable de ses ressources. Les prix à la vente des produits de la mer, notamment le poisson, reste inabordable par les consommateurs. Cependant, la couverture de ce déficit en poisson ne peut être assurée par la pêche maritime du fait de l’étroitesse de son plateau continental et par l’escarpement de sa côte. L’Algérie devra donc favoriser le développement de l’aquaculture et de la pisciculture en particulier. En eau continentale, depuis 1850 à ce jour, environ 400 évènements d’introduction ont été réalisés dans plus de 100 sites différents. Le but principal de ces introductions était l’aquaculture. Les espèces les plus souvent introduites sont les carpes (Cyprinus carpio, Hypophtalmichthys molitrix, Aristichtys nobilis, Ctenopharyngodon idella) et les Cichlidae (Oreochromis niloticus). Au total plus de 100 000 000 individus ont été introduits (alevins et géniteurs) dans les divers plans d’eau d’Algérie (Barrages, retenues collinaires, exploitations agricoles) pour une production de l’ordre de 20 000 tonnes. Notre propos ici est de décrire succinctement les enjeux et les motivations liés aux différentes introductions de poissons dans les plans d’eau, d’en résumer les résultats et d’essayer de tracer les perspectives.
Environmental impact assessment of a nitrogenous fertilizer (CAN 27% N) production in the Algerian plant
(2019-09-05) MAKHLOUF, Ali; QUARANTA, Gaetana; KARDACHE, Ramdane; CHAABIA, Raouf
This paper aims to assess the environmental impact of a fertilizers produced in Algeria. The Functional Unit chosen for this study is One ton of CAN at 27% of Nitrogen. In first, a detailed inventory of energy and materials flows for all life cycle of the product has been completed, and primary data collection was executed at the production facilities located in Algeria and completed by “Ecoinvent” database. Particularly, the energy performance and Greenhouse Gases (GHG) of the product (CAN 27% of N) were assessed. Evaluation of the impact was carried using GEMIS 4.7 software according to life Cycle Assessment (LCA) method and expressed with the “CML” method. Results have focused on the assessment of energy efficiency (Cumulative Energy Requirement (CER)) and of GHG emissions quantification. Global Warming Potential (GWP) is very significant due to the GHG emission of 2.46 t CO2 eq/FU of CAN. CO2 is the most important GHG emission factor with 1.21 T/T of CAN. The results show that the Algerian fertilizers production process is characterized by its high energy requirement (13.49 GJ/T of CAN), this request higher than the world average. The overconsumption in the Algerian process increases the cumulative energy requirement. Two factors contribute to explain this overconsumption of energy in the Algerian fertilizers production process, the first is related to the multiple restarts of the plant following the failures that usually occur. The second factor is the efficiency of the catalytic reaction in the upstream processes (NH3 and HNO3).
PRELIMINARY STUDY ON THE EFFECT OF LOW ELECTRIC CURRENT ON PRODUCTION OF BIOSURFACTANT BY Pseudomonas aeruginosa
(2019-09-18) Tazdaït, Djaber; Salah, Rym; Guiddir, Fadila; Temouche, Nawal; Abdi, Nadia; Grib, Hocine; Mameri, Nabil
Several studies have been attempted to investigate the effect of different parameters on the performance of biosurfactant production by microorganisms, these parameters include temperature, pH, agitation, and carbon and nitrogen sources. In literature, the studies devoted to the use of electric current are mostly focused on the treatment of wastewaters by electrocoagulation. However, to the best of our knowledge, no studies have been reported on the direct effect of electric current on microbial production of biosurfactants. The main purpose of this study was to investigate the effect of direct electric current on the performance of a biosurfactant-producing strain Pseudomonas aeruginosa, isolated from hydrocarbon-contaminated soil, to produce biosurfactant under aerobic conditions. The bacterial strain used in this study was previously isolated from a fuel-contaminated soil collected from a gas station located in Boumerdès, Algeria. The effect of direct electric current on the biosurfactant production was evaluated by varying the inter-electrode distance (d) (2, 4 and 6cm) with current density values (D) of 3µA/cm2 for 3 days at room temperature (21.7°C ± 3.07°C), at 150 rpm and pH 7. Besides, control experiment was carried-out under the same conditions for which no electrical treatment was performed. On the other hand, the biosurfactant concentration was determined at the end of each experiment using a solvent extraction method. The results clearly showed that direct current application with distance between electrodes of 2 cm yielded the highest biosurfactant production, and emulsification index (E24). Besides, the production cost decreases of about 20% with electric current application, which contributes very slightly in the total energy consumption cost. This method might, in the future, lead the way towards profitable application in enhancing biosurfactant production.
THE USE OF NEW LOW-COST SUBSTRATES FOR BIOSURFACTANT PRODUCTION
(2019-09-18) Salah-Tazdaït, Rym; Tazdaït, Djaber; Delhoum, Djura; Mouffok, Samia; Kabouche, Fatma; Keddou, Imene; Abdi, Nadia; Grib, Hocine; Mameri, Nabil
In literature, several carbon sources were used for biosurfactant production. Most of these studies are focused on the use of conventional carbon sources such as glucose, fructose, pyruvate, citrate, etc., but there are very few reports on biosurfactants production using inexpensive raw materials as substrates (complex carbon or nitrogen sources) which can considerably reduce production costs in most biotechnological processes.To the best of our knowledge, no data are available on the use of animal by-products as a sole source of nutrient for biosurfactant production. In this study, biosurfactant production by a pure bacterial culture was studied using an agro-industrial waste: prickly pear fruits of (Opuntia ficus-indica) peels, and two animal by-products: sardine (Sardina pilchardus) heads and chicken (Gallus gallus domesticus) feet, since they are discarded as a waste.The fuel-contaminated soil samples used for isolation of microbial strains were collected in five different locations at a gas station located in Boumerdès, Algeria. The bacterial strains capable of producing biosurfactants was isolated by selective enrichment culture technique, which promotes the growth of microorganisms containing in the soil sample by providing them the essential nutrients. To demonstrate the ability of strains to produce biosurfactants, different tests were carried out : test of the emulsification index E24, test of the blood agar, test of the drop collapse and test of spreading of the hydrophobic phase. The results showed that prickly pear peels medium yielded the highest biosurfactant production, and gave the highest E24 and cleaning activity values, while chicken feet gave the highest foaming activity. However, extensive research is needed to establish the suitability of these two low-cost substrates in industrial-level biosurfactant production process.
Antioxidant activity of phenolic compounds of Helminthotheca hechioides
(2019-09-27) Asmani. K; Dermeche .S
Phenolic compounds are a large group of phytochemicals, known for their antioxidant properties and potentially protection against cancer. The main objective of this work was to evaluate antioxidant activity of Helminthotheca echioides (leaves and stems), conventionally used in traditional medicine and local gastronomy of the Tizi-Ouzou (northern Algeria). Phenolic compounds were extracted from the plant powder by maceration, using three different solvents: methanol, ethanol and ethyl acetate. The main results obtained show that the aerial parts are very rich in flavonoids, tannins and coumarins. The analysis of functional groups by infrared shows that the plant is rich in phenol and ketone. The determination of the phenolic compounds of methanolic, ethanolic and ethyl acetate extracts, have very interesting polyphenol contents, 133.744 ± 27.35 mg GAE / g, 114.45 ± 2.42 mg GAE / g and 47.394 ±1.497 mg GAE / g, respectively. The antioxidant activity determined by DPPH, ABTS radicals assay and reducing power tests were carried out showing the strong antioxidant power of the extract with values of about 75% for DPPH and 95% for ABTS. The extract prepared on the basis of the mixture (methanol / formic acid) has the greatest inhibitory activity against E. feacalis (ATCC 29212), E. coli (ATCC 25922) and F. solani (ATCC 38136) with inhibition zone diameters of 20 mm, 16 mm and 75 mm, respectively. These results confirm that this plant has several biological activities. It would be interesting to use it as a functional powder for different uses (food and pharmaceutical).
Toward biotechnological conversion of olive oil mill by-products into valuable biomolecules and microbial biomass
(2019-09-27) Dermeche, Samia; Moulti-Mati, Farida
Background and Aim: Food wastes valorization toward valuable biomolecules and biomass have received increasing attention in recent years. Olive oil production is worldwide widespread but generate a huge amounts olive oil mill residues for which biotechnological management is a challenge issue for the olive oil producer. Olive mill wastewaters (OMWW) which are characterized by powerful antioxidant and recalcitrant compounds to biodegradation represent an important environmental problem. Therefore, finding a suitable biovalorization strategy to exploit these by-products is a great interest. Methods: The current study focused in OMWW conversion into valuable biomolecules and microbial biomass, probiotic bacteria and oleaginous yeasts for further lipids recovery. Antimicrobial potential of OMWW was also investigated. Yeasts and bacterial growth was monitored by plating on agar media. The antimicrobial properties of polyphenolic extracts from fermented and unfermented OMWW were assessed. Results: The results reveals that raw OMWW exert a strong inhibition against yeasts and bacteria while substrate pretreatment led to cell growth and polyphenol biodegradation by yeasts. Moreover, polyphenolic extracts provide a wide antimicrobial spectrum against pathogenic and food spoiling bacteria. Conclusion: OMWW could be considered as valuable substrate for microbial biomass production and bioactive compounds recovery
Assessment of the antipeudomonal activity of three essential oils using flow cytometry approach
(2019-09-27) Oussaid, Saliha; Madani, Khodir; Houali, Karim; Garcia Perez, Cristina; Rendueles, Manuel; Diaz, Mario
Beside its rapidity, flow cytometry is a very sensitive technique allowing both the detection of dead, metabolically active, viable and viable but no-cultivable cells. This approach was used, in this work, to estimate the antibacterial activity of essential oils (EO) from three aromatic herbs: Mentha spicata (MS), Mentha pulegium, and Rosmarinus officinalis against Pseudomonas aeruginosa ATCC 27853, which is an opportunist and food spoilage bacteria. The functional damages induced in P. aeruginosa treated with the three oils and incubated at 4 °C, 7 °C and 37°C was assessed and growth of tested strain was followed over time together with Suber green, Propidium iodide and ChemChrome V6. Irrespective of the culture conditions (the tested oil, its concentration, the time and the incubation temperature), significant reduction rate was observed compared with control, but there was generally no significant difference between the effects of all oils. In fact, after 10 h of incubation at 37°C, the total population in the treated inoculums with EO of Mentha pulegium at 0.4% concentration was 4 times lower than control preparation. At 7°C, metabolically active bacteria in the inoculums without treatment represented 25.65% on the 5th day, dropped to 12% on 10th day, then increase to the 37% on the 21st day. Whereas, the percentage of those treated was around 13, 10 and 15%, on the 5th, 10th and 21st day, respectively. We have noted that the incubation at 4 °C leaded to the stress of the cells with or without oils and the percentage of active cells was less or equal 8 % at the 21st day.
Main plant species grazed by goats in two types of rangelands in Algeria: mountainous vs. Saharan
(2019-10-21) S.A. Kadi; F. Gani; A. Mouhous; H. Guermah; R. Fiouane; F. Djellal
The objective of this study is to compare the pasture use and to evaluate the diversity of plant species grazed by goats in two different ecosystems: mountainous vs. Saharan range. For this, a questionnaire survey was conducted among 100 farmers in Tizi-Ouzou (mountainous region) and another 100 in Bechar (Saharan region) during the same period (15 March-17 May). In Tizi-Ouzou, the goat’s diet is almost (98%) based on grazing + supplement to the trough while in Bechar this practice is noted in 85% of the farms. In Tizi-Ouzou, this grazing takes place largely on the forest rangelands, maquis, natural meadows and fallows while in Bechar the goats graze especially in the ergs, regs and beds of Wadis. The main grazed plant species in the Tizi-Ouzou region are: Rosa sempervirens, Phillyrea angustifolia, Myrtus communis, Asphodelus microcarpus, Sinapis arvensis, Hedysarum flexuosum, Pistacia lentiscus, Calycotum spinosa or Cytisus spinosus, Rubus fruticosus, Inula viscosa or Dittrichia viscosa, Erica arborea and Lavandula stoechas. In Bechar, on the other hand, goats graze mainly: Cotula cinerea, Panicum turgidum, Stipagrostis pungens, Diplotaxis harra, Euphorbia guyoniana, Atriplex halimus, Tamarix gallica, Suaeda mollis, Artemisia herba alba, Zizyphus lotus, Helianthemum lippii, Retama retam, Moltkiopsis ciliata, Erodium triangulare. Pasture is almost the goat's diet in both regions. It should be noted the rich biodiversity of grazing species in the Saharan range which is at the same level or even better than the mountainous region in this study.
The goat meat sector in the mountain region: elements of its development and analysis of its value chain
(2019-10-23) A. Mouhous; S. A. Kadi; H. Guermah; F. Djellal; M. Berchiche
The aim of this study is to determine the different various actors in the goat meat value chain in the mountainous region of Tizi-Ouzou. The study of fifteen farms goats from a prior survey of 80 farms goats, showed that these farms are still conducted in extensive. The goat breeding has evolved and passed from self-consumption function to a production function for the market. Young goats are the most sold for their tender meat. The marketing of goat meat goes through few intermediaries (actors) that structure the market. Restaurants are a new segment that integrates the value chain and ensures a better value of goat meat. The price of goat meat is hot on the heels of sheep meat. Its fluctuation follows the moments of strong demands like the Aid-Al-adha. The demand for goat meat continues to grow. Because of its dietary characteristics, goat meat is beginning to interest a growing consumer segment. For that purpose, a better knowledge of the value chain of this meat will make it possible to target the opportunities for a better structuring of the market and its development.
EFFECT OF LOW ELECTRIC CURRENT ON PRODUCTION OF BIOSURFACTANT BY Pseudomonas aeruginosa
(2019-10-31) Tazdaït, Djaber; Tazdaït, Rym Salah
Several studies have been attempted to investigate the effect of different cultural parameters on the performance of biosurfactant production by microorganisms. In literature, the studies devoted to the use of electric current are mostly focused on the treatment of wastewaters by electrocoagulation. However, to the best of our knowledge, no studies have been reported on the direct effect of electric current on microbial production of biosurfactants. The main purpose of this study was to investigate the effect of direct electric current on the performance of a biosurfactant-producing strain Pseudomonas aeruginosa, to produce biosurfactant under aerobic conditions. The effect of direct electric current on the biosurfactant production was evaluated by varying the inter-electrode distance (d) (2, 4 and 6cm) with current density values (D) of 3µA/cm2 for 3 days at room temperature. The results clearly showed that direct current application with distance between electrodes of 2 cm yielded the highest biosurfactant production, and emulsification index (E24). Besides, the production cost decreases of about 20% with electric current application, which contributes very slightly in the total energy consumption cost. This method might, in the future, lead the way towards profitable application in enhancing biosurfactant production.
BIOSURFACTANT PRODUCTION USING NEW LOW-COST SUBSTRATES
(2019-10-31) Salah-Tazdaït, Rym; Tazdaït, Djaber
are focused on the use of conventional carbon sources such as glucose, fructose, pyruvate, citrate, etc., but there are very few reports on biosurfactants production using inexpensive raw materials as substrates (complex carbon or nitrogen sources) which can considerably reduce production costs in most biotechnological processes.To the best of our knowledge, no data are available on the use of animal by-products as a sole source of nutrient for biosurfactant production. In this study, biosurfactant production by a pure bacterial culture was studied using an agro-industrial waste: prickly pear fruits of (Opuntia ficus-indica) peels, and two animal by-products: sardine (Sardina pilchardus) heads and chicken (Gallus gallus domesticus) feet, since they are discarded as a waste.The fuel-contaminated soil samples used for isolation of microbial strains were collected at a gas station located in Boumerdès, Algeria. The bacterial strains capable of producing biosurfactants was isolated by selective enrichment culture technique. The results showed that prickly pear peels medium yielded the highest biosurfactant production, and gave the highest E24 and cleaning activity values, while chicken feet gave the highest foaming activity. However, extensive research is needed to establish the suitability of these two low-cost substrates in industrial-level biosurfactant production process.
Accompagnement de trois villages de la commune de bouzeguene (Taourirt, Ahrik, Sahel) (Tizi-Ouzou) pour la consolidation du tri/compostage des déchets ménagers
(2019-11-14) METNA, Fatiha; HAMMOUM, Arezki; Kanane, Mélissa; Slimani, Rachid; OUALI, Saliha; HARGAS, Nabila
L’objectif de notre étude est l’accompagnement des trois villages (Taourirt, Ahrik, Sahel) de la commune de Bouzeguène, pour perfectionner leur schéma de gestion des déchets ménagers. Pour cela, nous nous sommes impliquées comme agents de changements des comportements et des visions vis-à-vis de la gestion de ces déchets en organisant des actions de sensibilisation et d’éducation à la gestion durable des déchets ménagers. Nous avons ciblés les comités des villages, les associations, les femmes, les élèves au niveau de l’école primaire et l’employer chargé de la gestion du centre de tri. Enfin, les acteurs institutionnels étant les autorités locales et régionales, ils ont le pouvoir de mettre en œuvre un plan de gestion durable des déchets ménagers. Les résultats obtenus sont les suivants : - Pour le village Taourirt, nous avons pu déterminer la tache de chaque acteur pour une bonne organisation et une gestion durable des déchets et nous avons élaboré un règlement intérieur du centre de tri pour son bon fonctionnement. Après avoir identifié les problèmes liés au traitement des bio-déchets au niveau du centre, nous avons envisagé un autre mode de traitement de ces déchets qui est le compostage en tas. - Pour le village Ahrik, afin d’y remédier et régler les problèmes que nous avons identifié au niveau du centre de tri nous avons élaboré un règlement intérieur du centre de tri pour son bon fonctionnement.
Facilitation by nurse plant Juniperus communis subsp. hemisphaerica and its role on natural regeneration of cedar forest on the southern slope of Djurdjura (Algeria)
(2019-11-17) Meddour .R; Sahar .O; Bitam .L; Belhacene D
The main objective of this study is to determine if Juniperus communis subsp hemisphaerica, a nurse plant, plays a facilitating role in the evolutionary dynamics of the cedar forest in the massif of Djurdjura. In order to highlight the possible effect of the presence / absence of cedar seed trees on vegetation dynamics and the natural regeneration of this species, the choice of study sites meets the criterion of representativeness and takes into account three different phytoecological situations: a dense stand of cedar, a cedar-pasture ecotone area and a juniper formation without cedar seed trees. In each type of these sites, we sampled 13 tufts of hemispherical juniper, each one representing a floristic record; the dimensions of each record are those of the patch itself. To appreciate the various correlations that may exist between the nurse plant, its biological characteristics and the facilitated species, through different parameters, such as specific diversity of the flora, number of tall scrubs and recovery of individuals of Cedrus atlantica within juniper thickets, we used multivariate analysis for the handling of the data collected. The dataset table contains 39 surveys and 16 dendrometric and biological variables of the juniper individuals measured at the three study sites. The results obtained make it possible to highlight the nature of the positive interactions of this juniper in the dynamics of the cedar forest. These interactions, rendered by the role of shelter provided by the tufts of hemispherical juniper, favor the emergence of a microhabitat adequate to the installation of the plant species linked to the cedar stand, thus protecting them from ecological stress in mountain and anthropogenic disturbances. Among these latter, overgrazing remains the major problem threatening the biological recovery and biodiversity of the Djurdjura massif. It would be conceivable to use this facilitation process for ecological restoration of the degraded cedar forest in Djurdjura.
Antimicrobial potential of mixed ligand copper(II) complexes with dimethylglyoxime and some amino acids
(2019-11-17) T. Amrouche; H. Bougherra; O. Berradj; A. Adkhis
In this work, six copper(II) complexes with dimethylglyoxime and amino acids (tryptophan, glutamate, proline, arginine and valine) have been prepared and provided by coordination chemistry laboratory from Mammeri University (Algeria) to be tested in vitro for their antimicrobial activities. Thecopper(II) complexes identified by numbers 1 to 6 were found to be solid, insoluble in water, ethanol, and methanol, but soluble in dimethylsulfoxide, and dimethylformamide. The antimicrobial activity of the ligands and their metal complexes were tested against the Escherichia coli (Gram negative bacteria), Bacillus cereus (Gram positive bacteria), Candida albicans (yeast) and Aspergillus niger (mold). The determination of the antibacterial activity was performed using well agar diffusion method. Results obtained demonstrated that only complexes 2 and 6 were active against bacteria compared to ampicilline (antibiotic) used as positive control. Whereas complexes 2, 3 and 5 tested against Candida albicans and Aspergillus niger were shown more active against C. albicans than A. niger. Our findings suggested the possibility of use of copper(II) complexes as antimicrobials in food preservation or cleaning products.
ocidal effects of grapefruit essential oil (citrus maxima) on the lastest stages of tuta absoluta tomato mineuse (MEYRICK, 1917)
(2019-12-18) Chougar. S; Medjdoub-Bensaad. F
Background and aim: Since the introduction of the microlepidopter Tuta absoluta in Algeria, tomato crops in the fields and especially in greenhouses have suffered colossal losses as a result of the pest's damage. The fight against tomato leafminer sometimes requires the use of chemical insecticides that are harmful to the environment and to human health. Several alternatives of struggle are reaped against this insect. Methods: During this experiment carried out in the laboratory, the L3 and L4 larvae of Tuta absoluta are distributed in batches of 10 individuals, subjected to inhalation of the essential oil of grapefruit, in different doses. A control group was not exposed to any treatment. Results: The results obtained show us that all the larvae of the L3 and L4 stages are dead and this, after a few hours of exposure to the different doses of the essential oil of the grapefruit. Conclusion: The use of this essential oil has proved very effective against the larvae of the last stages of T. absoluta.
Agronomical and environmental soil quality under sewage sludge amendment and treated wastewater irrigation
(2019-12-19) Cherfouh, Rabia; Lucas, Yves; Derridj, Arezki; Merdy, Patricia
This study was carried out to evaluate the agronomic proprieties and the heavy metals contamination of soils from Boumerdes. Agronomical parameters, concentration and metals speciation were determined by soils, urban treated wastewater (TWW) and sewage sludge (SS). The TWW and SS collected was rich in organic matter, N, P and K. Thus, this result is one positive outcome for their applications on soil. We found that the agronomic quality of the treated soils has not decreased. Both SS amendment and TWW irrigation brought high amounts of nutrients, nutrients availability, and soil organic matter. The pH increase does not seem to be a problem for the crops growth. Exposure to heavy metals may cause adverse effects to human health and the environment. Sequential extraction was used to evaluate the concentration and bioavailability of Cd, Cu, Ni, and Zn from three agricultural soils. Only Cu (151 mg.kg-1) concentration in wastewater-irrigated soil exceeded the permissible limits defined by Algerian norm (NA-17671). Under TWW irrigation the Copper amount increased significantly, but the bioavailability remind equivalent to others soils often under 41% of the total concentration. However, the SS application lied from the soil most quantity of Cu (71 mg.kg-1) and Zn (95 mg.kg-1), with accumulation rate between 1,7 and 3,2 the concentration of referential soil. Amount of Cd in the soils was less than 0,3 mg.kg-1. This investigation concluded that TWW and SS improved agronomical potentiality of soils. However, continued application may lead to accumulation of metallic element and constitute a potential environmental hazard.

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