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The Study of the Germination Behavior of Forage Species on Substrates Taken from the Soil of Awleigatt National Park in Mauritania
 
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1
Unit of Biodiversity and Valorization of Plant Resources, Faculty of Science and Technology, University of Nouakchott, BP 880, Nouakchott, Mauritania
 
2
Laboratory of Plant Biotechnology and Physiology, Center for Plant and Microbial Biotechnology Biodiversity and Environment, Faculty of Sciences, Mohammed V University of Rabat, Rabat 10000, Morocco
 
3
Higher Normal School, BP 990, Nouakchott, Mauritania
 
 
Corresponding author
Mohamed Mahmoud Abidine   

Unit of Biodiversity and Valorization of Plant Resources, Faculty of Science and Technology, University of Nouakchott, BP 880, Nouakchott, Mauritania
 
 
Ecol. Eng. Environ. Technol. 2023; 6:257-269
 
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ABSTRACT
Awleigatt National Park (ANP) is a zoological site ensuring both the conservation and restoration of biodiversity on a national scale. In this perspective, the ANP has set as one of its ambitious objectives the autonomy in fodder needs. The objective of this work is to study the adaptability of three forage species (Medicago sativa, Acacia senegal and Lablab dolichos lablab) to the edaphic conditions of the NAP. Our approach is to characterize three types of representative ANP soil substrates in order to develop an interpolation map of ‘’EC’’ conductivity and pH data. Subsequently, the germination behavior of the three species was studied in the laboratory on three substrates taken from the study area (Dune, Flanc dunaire and Interdune) in the absence and presence of NaCl (0, 50 and 100Mm). Our results show that the soils are basic and the electrical conductivity is higher in the inter-dune substrate. The mapping of the study area corroborates the experimentally obtained data. Germination behavior shows that germination is best on dune and dune flank substrates. The addition of high concentrations of NaCl (100mM) shows that cowpea is the most resistant to salinity. Medicago sativa and Acacia senegal show low germination capacity both in the absence and in the presence of NaCl, most likely reflecting a low embryonic longevity of the seeds used. The parameters deduced from the germination kinetics curve show that the adverse effect of salinity in the three species is observed at all three germination phases (TL, GSS and CG). As a result, the effect of salinity on germination of all three species is both osmotic and toxic.
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