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Trichoderma-BASED BIO-STIMULANT APPLIED ON OKRA (Abelmoschus esculentus L.) BIOPRODUCT APPLIED ON OKRA

Sat, 31 Dec 2022 00:00:00 GMT

Titre: Trichoderma-BASED BIO-STIMULANT APPLIED ON OKRA (Abelmoschus esculentus L.) BIOPRODUCT APPLIED ON OKRA Auteur(s): DEHLIZ A; BEN LAMOUDI W; GUEZOUL O; HAMMI H; BERRAKBIA M; LAKHDARI W Résumé: Okra is a popular lucrative crop in African countries but it hasn’t yet been scientifically experimented with Algerian open fields. This work aims to examine the potential of a Trichoderma-based bio- stimulant on the performance of this crop. The experiment was conducted, in the region of Touggourt, according to a randomized complete block design with three rehearsals. Three plots were treated with the bioproduct (20g/2.5 m2 ) and three others were untreated (controls). The assessment was conducted by measuring 13 agro-morphological plant characters associated with growth and yield. The study revealed that the biological product has a stimulating efficiency towards the mostly examined parameters especially the yield, which was doubled compared with the untreated crop. Statistical analysis revealed a significant stimulant effect on quantitative variables of growth (Wilk’s Ʌ= 0.440, F (7, 52) 9.45, p= < 0.05) and yield (Wilk’s Ʌ= 0.72, F (3, 38) 4.89, p= 0.006). Moreover, three stages of development (lifting, flowering, and fruiting) were improved after treatment application. Pearson’s Chi2 test showed that qualitative parameters were strongly associated with the bio-stimulant effect, χ2 = 97, df= 4, p= < 0.05.This treatment incorporated upstream of the culture was very efficient in promoting okra attitude and it can turn local ideology to use organic products in agriculture. Description: Revue des BioRessources

GIBBERELLIN PRODUCTION BY ANTAGONISTIC FUNGUS STRAINS (Trichoderma harzianum)

Sat, 31 Dec 2022 00:00:00 GMT

Titre: GIBBERELLIN PRODUCTION BY ANTAGONISTIC FUNGUS STRAINS (Trichoderma harzianum) Auteur(s): LAKHDARI W; AZHER A; MLIK R; BENYAHIA I; MEKHADMI N.E; GUEZOUL O; HAMMI H; DEHLIZ A Résumé: Trichoderma is one of the most important fungi in agriculture. It has demonstrated many capabilities to be used as biofertilizers as well as bio-fungicides. It has also shown its sustainability and various mechanisms of providing the crop with nutrients. It was reported to improve the plant growth of many crops. Six strains of Trichoderma harzianum were isolated and identified in the laboratory of biopesticides in the National Institute of Agronomic Research of Algeria (INRAA). All the obtained strains were tested for their capacity to produce gibberellin. The results revealed that all the isolated strains have the ability to produce GA3 whereas the 1st strain showed the production of GA3 with no difference between days. Unlike, the other strains showed very highly significant production of GA3 between days. The production of GA3 reached the highest value after 14 days, unlike the 7 and 21 days after. On the other hand, S2 presented the highest average for filtrate content of GA3 with 83 mg/100mL, followed by S with 76 mg/100mL, and S5 with 68 mg/100mL, while other isolates have recorded the lowest average of 64, 75, and 48 mg/100mL. Description: Revue des BioRessources

ETUDE DE L’IMPACT DE LA GESTION DE L’EAU SUR LA PERFORMANCE DE LA PALMERAIE DE LA STATION DE L’INRAA DE SIDI MAHDI-TOUGGOURT

Sat, 31 Dec 2022 00:00:00 GMT

Titre: ETUDE DE L’IMPACT DE LA GESTION DE L’EAU SUR LA PERFORMANCE DE LA PALMERAIE DE LA STATION DE L’INRAA DE SIDI MAHDI-TOUGGOURT Auteur(s): YOUCEF Nasreddine; DADDI BOUHOUN Mustaphar Résumé: Agriculture with Touggourt, all the time, was dominated by the mode of exploitation oasien associated the phoeniciculture, which covers a very significant surface and is characterized by a density of palm tree (monopolized by the variety of DégletNour) variable of a palm plantation to other.This area of study is characterized by the availability of its underground hydrous resources.However, the bad management of this water potential had repercussions prejudicial on the environment oasien, particularly phoenicicole.Studies of installations are carried out in the station of the INRAA Sidi Mahdi Touggourt to improve management of the irrigation and the performance of the palm plantation.This research aims at evaluating the potential of degradation and productivity in an experimental medium.It will be focused mainly on the hydro-edaphic environmental pollution and the performance of the date palm. Description: Revue des BioRessources

ANALYSE DES PERCEPTIONS LOCALES DES SERVICES ECOSYSTEMIQUES FOURNIS PAR LE SYSTEME OASIEN DU MANGA (SUD-EST NIGERIEN)

Sat, 31 Dec 2022 00:00:00 GMT

Titre: ANALYSE DES PERCEPTIONS LOCALES DES SERVICES ECOSYSTEMIQUES FOURNIS PAR LE SYSTEME OASIEN DU MANGA (SUD-EST NIGERIEN) Auteur(s): ABOUBACAR MOUSTAPHA Moustapha; TIDJANI Adamou Didier; ALHASSOUMI Hadizatou; AMBOUTA Karimou Jean-Marie Résumé: The oasis system of the Manga constitutes a unique ecosystem with dune facies which are linked and surround the depressions in the form of shallows and oasis basins. These valleys, which are threatened by silting, support the economic activities of the inhabitants and offer numerous ecosystem services. The aim of this study is to analyse local perceptions of ecosystem services in the Manga in order to establish sustainable strategies for the perpetuation of ecosystem services. Data were collected through village assembly surveys and individual interviews with a sample of 194 farmers. The results show that farmers perceive 18 ecosystem services in the four categories defined by the Millennium Ecosystem Assessment. The category of provisioning services is the most diverse with 10/18 of the services mentioned. The perception of ecosystem services varies little across the study areas and gender has a significant influence on perceptions. Communities are aware of the threats to exploited ecosystems and are willing to preserve ecosystems through local strategies to sustain the services they derive. Community involvement in implementing these sustainability strategies is influenced by gender and income level of the farmers. The implementation of simple strategies within the reach of farmers should allow for sustainable use of ecosystems and provision of services for the well-being of communities. Description: Revue des BioRessources