Abstract
ABSTRACT Morocco decides to launch a program to create additional argan orchards to meet the high national and worldwide demand for argan products, which is a specie so unique in the world threatened by the global climate change effect. The current study aims to evaluate the efficiency of a multi-species consortium of autochthonous mycorrhizal fungi ‘Rhizargan’ isolated from 15 Moroccan argan soils in promoting mineral nutrition intake, phosphatase activities, and plant growth of argan trees. The research was conducted on two contrasting ecotypes of argan (Admine and Lakhsas). For 25 months, the performance of argan seedlings inoculated with Rhizargan consortium was monitored and compared to those inoculated with a pure commercialized strain of Rhizophagus irregularis. The results showed that inoculation with the ‘Rhizargan consortium’ improved plant growth, mineral nutrition, and phosphatases activity more than R. irregularis inoculation. Inoculated Lakhsas and Admine seedlings with Rhizargan consortium increased shoot height by 19% and 26%, and alkaline phosphatase activity by 27% and 14%, as compared to R. irregularis. Our findings can significantly benefit the arganiculture program, as an ecofriendly strategy, by using Rhizargan consortium as biofertilizers adapted to a wider range of argan forest’ pedoclimatic conditions.
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