Unit de Recherche en Partenariat Forts et Biodiversit
Unité de Recherche en Partenariat « Forêts et Biodiversité » Madagascar ______________________________ Accelerating the reforestation by Vegetative propagation of native species trees by cutting. Rakotovao Z. , Andrianoelisoa H. , Ramiandrisoa D. 1
Objective of the study • To produce a numerous and low cost planting material stocks in aim to restore the degraded forest landscape Specific objective for Ravensara aromatica : • To ensure that chemotypes identified through chemical analyses of essential oil will be maintained in clonal trees. • To respect the market request of homogeneity of essential oil composition to win added value. 2
Material and method • 200 stem cuttings, 2 trees for every 5 chemical patterns of Ravensara aromatica ; harvested in 4 natural forests (Ampasina, Didy, Anosibe an’Ala, Raboana) • Avalaible number of cuttings from other available native species trees met in forest. • Simple technic easily transfered to local population (leafy stem cutting 7 -10 cm length, 7 -10 mm diameter, hormone AIB 1%(optional), raised in plastic bag on mixture 2/3 compos 1/3 river sand, raised on chassis, daily morning watered) 3
Main Results • Ravensara aromatica Forest Locality Chemotype Date of cutting number Ampasina 3 Didy 4 Anosibe an’Ala Raboana Issue 2 February 2007 March 2007 February 2007 May 2007 June 2007 15 % 77 % 0 0 38 - 42 % 3 June 2007 19 - 39 % 4
Main Results (other native species) Species Locality of Month gathering cutting of Results Symphonia tanalensis -Anosibe An’Ala -June 2007 - Vohim. -Aug. 2007 Ocotea laevis Anosibe June 2007 Unsuccessfully Canarium madagascarien sis -Anosibe June 2007 Ampasina January 2008 Unsuccessfully Weinmannia rutembergii Vohimana August 2007 Unsuccessfully Sloanea rhodantha Vohimana August 2007 Unsuccessfully Green after 1 - 2 months and withered later Unsuccessfully 5
Main Results (other native species) Species Locality gathering of Month cutting of Results Dilobeia thouarsii Vohimana August 2007 Unsuccessfully Dalbergia monticola - Anosibe - Vohimana June 2007 - Unsuccessfully August 2007 12 vigourous plantlets on 20 -25 cm height transplanted in Vohimana Dalbergia chapelieri Vohimana August 2007 New shoots and leaves and whithered later Ocotea cymosa - Anosibe an’Ala - Vohimana - Ampasina - Jun. 2007 Green after 2 monts and withered later - Aug. 2007 - id - Jan. 2008 New shoots and leaves after 2 - 3 months 6
Illustrations Ravensara aromatica Dalbergia chapelieri Dalbergia monticola Ocotea cymosa 7
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