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To obtain high quality argan seedlings ( Argania spinosa L. Skeels) in the nursery, eight types of containers and three different substrates for off-ground cultivation (shredded composted branches of Acacia cyanophylla , composted hulls of Tetraclinis articulata seeds, commercial peat) mixed with leaf mould in different proportions were tested. Physico-chemical analysis of the substrates showed that the two locally produced types of compost were better indicated for the production of high quality argan seedlings. These substrates could be an alternative to costly, imported peat-based substrates. Compost can be produced satisfactorily from shredded Acacia cyanophylla branches to meet the needs of local tree nurseries. Changes in morphological parameters and analyses of the seedlings after seven months in the nursery showed that a 400 ml container is suitable for the production of argan seedlings of similar quality to that obtained with 800 ml polythene bags. These results are a first step towards mastering techniques for off-ground production of argan seedlings and other indigenous Moroccan tree species. Further study would be needed on other aspects of seedling production in Moroccan nurseries, such as irrigation, fertilisation and mycorhization. Trial plantations are under consideration to confirm the results of this study.

Production de plants d’arganier (Argania spinosa) au Maroc : choix du conteneur et du substrat