Boosting land restoration success in the Great Green Wall through the use of symbiotic microorganisms for propagated tree seedlings

Abstract

Several studies have clearly demonstrated the scientific and practical use of the symbiotics microorganisms for plants in earth ecosystems. The main goal of this study was to rehabilitate a degraded soil of the sahelian zone of Burkina Faso by using the rhizobia and mycorrhizal symbiosis through the inoculation technique. Native rhizobial strains were isolated from soil samples. These strains were then tested in laboratory and greenhouse conditions for their effects on the nodulation and growth of Vachellia seyal. At the end of these tests three promising strains were selected to form a complex that was used with or without arbuscular mycorrhizal fungus for the inoculation of plants produced in nursery or issued from direct seedling at the field. After 3, 12 and 14 months of cultivation, respectively, the growth parameters of plants such as the height and the collar diameter were measured. In addition, the field survival rate of plantations was evaluated. The results showed that inoculation has improved the growth and survival rate of Vachellia seyal plants in the field. The double inoculation was more effective than the single inoculation. With these promising results, we recommend inoculation of seedlings for a better success of restoration plantings in the Sahel.
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 Keywords: Symbiosis, native strains, rehabilitate, inoculation, sahelian zone

Ten golden rules for reforestation to optimize carbon sequestration, biodiversity recovery and livelihood benefits

“…Ideally, small‐scale trials should be implemented before large‐scale tree planting commences, to guide species choices and test the effectiveness of proposed techniques. These may include land management interventions to overcome site‐specific barriers, such as degraded soils (Arroyo‐Rodríguez et al, 2017; Estrada‐Villegas et al, 2019), competitive weeds (FAO, 2019), fire and herbivores (Gunaratne et al, 2014; Rezende & Vieira, 2019), and the absence of mutualistic organisms in soils, such as mycorrhizal fungi (Asmelash et al, 2016; Fofana et al, 2020; Neuenkamp et al, 2019). Unfortunately, trials take years to yield results, so projects often have to be initiated through the exchange of previous knowledge.…”

Potential Use of Beneficial Microorganisms for Soil Amelioration, Phytopathogen Biocontrol, and Sustainable Crop Production in Smallholder Agroecosystems

“…Chavoshi et al (2018) reported a maximum biomass accumulation of 7,985 kg ha −1 in red beans and a higher water use efficiency after inoculation with Bio-P and Bio-K fertilizers in limited water resources. In desert areas of the Sahel region, double inoculation of indigenous rhizobia and AMF isolates improved the survival rate and growth of Vachellia seyal (acacia) plantations (Fofana et al, 2020). The authors attribute the improved plant growth to the adaptation of the native bioinoculants to the pedoclimatic conditions of the region and the microbial synergism in delivering plant nutrients under water and heat stress conditions.…”

“…Recently, many development programs in collaboration with the local farmers of the Sahel region have engaged to combat the rising desertification through the use of leguminous trees such as acacia (Sileshi et al, 2020). Legumes such as Acacia seyal, A. senegal, and A. albida have successfully demonstrated their ability to interact with the indigenous AMF and rhizobia species of the Sahel region of West Africa and are considered potential agents for carbon sequestration and land restoration in the region (Fofana et al, 2020). Based on these and other evidence, integration of biofertilization and optimization of agroforestry techniques in the context of an integrated fight against desertification should be considered.…”