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Seasonal dependence of rooting success in cuttings from natural forest trees in Madagascar

Danthu P., Ramaroson N., Rambeloarisoa G.. 2008. Agroforestry Systems, 73 (1) : p. 47-53.

DOI: 10.1007/s10457-008-9116-7

Four ligneous species from the tropical forest in the east of Madagascar, with a proven or potentially high economic value, were subject to ¿low-tech¿ vegetative propagation tests from stem cuttings. The species concerned were Aphloia theiformis, Ilex mitis, Prunus africana and Ravensara aromatica. The cuttings were three-node segments of stems on which one leaf was retained. All the species proved amenable to rooting. The maximum percentage of rooting ranged from 33% for P. africana to 60% for I. mitis. Rooting success was dependant on the season of cutting (high in the hot season, from October to May, and null in cold season). This study is the first successful attempt at propagating cuttings from Malagasy forest species. This result is of particular importance to P. africana, threatened by destructive exploitation in Madagascar. It goes a step further in the domestication of this species by demonstrating the ability of cutting from 10 year old ortets collected in natural forest to root as it offers the possibility of a reliable and effective method of reintroduction for the species in overexploited zones.

Mots-clés : multiplication végétative; plante ligneuse; bouturage; ilex; prunus; lauraceae; forêt tropicale; agroforesterie; madagascar; ilex mitis; ravensara aromatica; prunus africana; aphloia theiformis; forêt naturelle

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