Adéquation entre quantité de pâte stimulante et production de caoutchouc d'Hevea brasiliensis dans le sud-est de la Côte d'Ivoire
1996
Obouayeba, S. | Boa, D. | Keli, ZJ.
Relationship between Stimulating Paste Quantity and Production of Hevea brasiliensis in South-East of Ivory Coast. The effect of hormonal stimulation on dry rubber production was studied using four quantifies of stimulating paste (0, 65, 0, 71, 0, 77and 1 g) on clones GT 1 and PB 217 of Hevea brasiliensis in Southeastern of Ivory Coast. The productivity of stimulated trees was in average improved to the two-third, no matter the clone used. The effect of stimulating paste quantity appeared significantly at the production level, in the ratio of the yield improvement and in the residual of Ethrel (which persists the first fifth tapping after stimulation). Hevea productivity is generally correlated to the length of tapping cut. However, after stimulation, the inverse tendency was observed, short tapping cuts becomed more efficient. The quantifies of stimulating paste 0, 65 and 1 g which gave best result could be retained for clones GT 1 and PB 217. The results of this study showed that the reduction of stimulating paste quantity is justified for clone GT 1 but there is adequation between production and quantity of stimulating paste preconised in case of clone PB 217. This confirms the difference of metabolic activity between the two clones studied.
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