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Effect of plant Communities and Ecological Parameters on Soil Organic Carbon Stocks in the Mamora Forest, Morocco

Boujraf Amal, Dallahi Youssef, Dahmani Jamila, Orlando Collins Ashianga, Douira Allal

Journal of Ecological Engineering

2023

Vol. 24, nr 5

128--136

Several studies on the assessment of soil organic carbon (SOC) stocks have been carried out at the global level. However, reliable information on SOC stocks is not readily available at the regional level. In addition, very few studies have assessed the factors responsible for the variation of SOC stocks, in particular the effect of plant communities. For this purpose, the main objective was to analyze the effects of three plant communities and ecological parameters on the SOC stock in the Mamora forest. Specifically, the authors looked to examine the relationships between SOC stock and plant communities and to define the main parameters that directly influence SOC stock. Ten soil profiles with three replications were sampled at each plant community, from which SOC stock was determined. To assess the effect of plant communities on SOC stocks, phytosociological surveys were carried out according to the phytosociological stigma method developed by Braun-Blanquet. The results show that the SOC stocks in cork oak soils are characterized by high variability, with values ranging from 55 t•ha-1 to 95 t•ha-1. Indeed, the findings of this study showed that the SOC stocks fluctuated significantly with plant communities. In addition, SOC stocks were also affected by the interactions between plant communities, the amount of litter and the density of the cork oak stand. These outcomes of this study highlight the critical need to incorporate community-specific carbon values into future carbon sequestration modeling.

Arbuscular Mycorrhizal Symbiosis in Two Cannabis Varieties (Khardala and Critical) in Morocco

Msairi Soukaina, Rais Chaimae, Maazouzi Soukaina, Artib Mariam, El Gabardi Soumaya, Mouden Najoua, Selmaoui Karima, Benkirane Rachid, Touhami Amina Ouazzani, Douira Allal

Ecological Engineering & Environmental Technology

2023

Vol. 24, iss. 5

30--35

The richness of the soil in beneficial and growth-stimulating microorganisms and their symbiotic interactions with plants is a factor to be discovered. This kind of relationships is still poorly studied in cannabis (Cannabis sativa L.). The endomycorrhizal status of cannabis was assessed in two cannabis varieties (Khardala and Critical) cultivated in the Taounate region located in northern Morocco. Soil samples collected from the rhizospheric soil of two cannabis parcels of khardala and critical were studied using the wet sieving method. Rhizospher soil of khardala presents a sporal density of 200 spores/100 g of soil and a combinaison of 12 different AMF species divided morphologically into 6 genera predominated by Glomus and Funneliformis. In the other hand, 243 spores per 100 g of soil were noted in association with critical variety, the endomycorrhizal fungi community was represented by 15 species of 6 genera predominated by Glomus. Contrary to expectations, cannabis is found to be mycorrhized, this symbiotic association can be exploited in the soon future to develop profitability and cope with different types of stress.