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The main object of the present study is to investigate the effect of the fragmented ramial wood supply technique on the physicochemical characteristics of the sandy soil and the potato in the Souf region (Northen Algerian Sahara). This... more
The main object of the present study is to investigate the effect of the fragmented ramial wood supply technique on the physicochemical characteristics of the sandy soil and the potato in the Souf region (Northen Algerian Sahara). This study was conducted at the experimental station of El Oued University during the spring season 2016. RWF intake the Lucena (Lucaena leucocephala) and olive (Olea europaea) is applied in mulch at different doses. The obtained results show that the RWF technique records highly significant effects for CE : 1,832 µs/cm, pH: 6,8 , K: 275,53 mg.kg -1 , P: 90,38 mg.kg -1 , Nt: 201,4 mg.kg -1 , OM: 0,12% and C: 0,07%, and a significant effect for the ratio C/N: 3,46. Significant differentiations were also recorded in germination coefficient: 0.048 and germination percentage: 100%, as in leaf length: 18,5 cm and area: 24,32 cm 2 , which reflected on the fresh weight: 1,30 g and dry weight: 0,622g of the leaves and the relative water content: 74,93%. In conclu...
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Quinoa is an important Andean crop that can play a strategic role in the development of degraded lands in hot arid regions due to its high nutritional value, genetic diversity and its high adaptability to stressful environments. The aim... more
Quinoa is an important Andean crop that can play a strategic role in the development of degraded lands in hot arid regions due to its high nutritional value, genetic diversity and its high adaptability to stressful environments. The aim of this work was to evaluate the agronomic performance (growth development, grain yield and grain quality characteristics) of seven quinoa genotypes (Giza1, Sajama, Santa Maria, Q102, Q29, Q27 and Q18) cultivated under open field conditions in the Sahara Desert of Algeria. Using randomized complete block design (4 blocks), field trials were conducted during two cropping seasons (2017–2018 and 2018–2019) from November to April. The measured parameters included: plant height, number of panicles per plant, 1000-grain weight (TGW), grain yield (GYd), grain protein content (GPt), grain saponin content (GSC), and maturity indicators. The genotype effect was statistically the main source of variation in most parameters investigated as compared to the effect...
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Research Interests: Chemistry, Organic agriculture, Responses of plant to abiotic stresses, Arid environments, Agriculture, and 11 moreSalt Stress, Abiotic Stress, Agriculture and Food Studies, Soil Salinity, Fertilizer Management, Potato, Fertilizer, Organic Fertilizers, Soil Fertility, Poultry Manure, and Optimize Yield
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UNIVERSITE KASDI MERBAH - OUARGLA Faculte des Sciences de la Nature et de la Vie Departement des Sciences Agronomiques
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The Sahara Desert is characterized by extreme environmental conditions, which are a unique challenge for life. Cyanobacteria are key players in the colonization of bare soils and form assemblages with other microorganisms in the top... more
The Sahara Desert is characterized by extreme environmental conditions, which are a unique challenge for life. Cyanobacteria are key players in the colonization of bare soils and form assemblages with other microorganisms in the top millimetres, establishing biological soil crusts (biocrusts) that cover most soil surfaces in deserts, which have important roles in the functioning of drylands. However, knowledge of biocrusts from these extreme environments is limited. Therefore, to study cyanobacterial community composition in biocrusts from the Sahara Desert, we utilized a combination of methodologies in which taxonomic assignation, for next-generation sequencing of soil samples, was based on phylogenetic analysis (16S rRNA gene) in parallel with morphological identification of cyanobacteria in natural samples and isolates from certain locations. Two close locations that differed in microenvironmental conditions were analysed. One was a dry salt lake (a “chott”), and the other was an...
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In hot arid lands, soil salinity, irrigation with brackish waters and the massive use of mineral fertilizers are major constraints for the development of potato cropping. The current field experiment was conducted in the Sahara Desert of... more
In hot arid lands, soil salinity, irrigation with brackish waters and the massive use of mineral fertilizers are major constraints for the development of potato cropping. The current field experiment was conducted in the Sahara Desert of Algeria in order to highlight the effect of organic fertilization on the improvement of potato production and the increase of plant salt-stress tolerance. The variation of yield production parameters and nutritional status of plants were evaluated through a split-plot design including six increasing rates of poultry manure (PM) (0, 20, 30, 40, 50, 60 mt/ha) tested in three experimental sites with increasing salinity levels: low saline soil (electrical conductivity ‘EC’ = 0.9 dS/m), saline soil (EC = 2.2 dS/m) and high saline soil (EC = 5.9 dS/m). The results revealed a significant and proportional increasing of all studied yield parameters (number, seize and yields of tubers) with the increase of PM rates compared to the control. The effect of the interaction (PM × salinity level) showed that the highest yield (44.55 mt/ha) was recorded in plots treated with 60 mt/ha of PM in high saline soils. The assessment of nutritional status at flowering stage of potato plants demonstrated that concentrations of K+ and N increased while Na+ concentrations decreased, in both leaves and roots, as PM rates increasing, principally beneath high salinity level. Our findings suggest the dose of 60 mt/ha of PM is an optimal amount producing the best tuber yields under saline conditions in arid soils.