000			01292nam a2200205Ia 4500
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100			_aObouayeba S
245		0	_aDynamics of vegetative growth of Hevea brasiliensis in determining tapping norms
260			_bJournal of Rubber Research _c2000
300			_a53-62
520			_aA study to determine norms for the tapping of Hevea brasiliensis was carried out in Cote dIvoire. This was aimed at defining age and minimum girth for the panel opening of Hevea which takes into account the notion of physiological maturity. The modelled vegetative growth curve is a sigmoid with a change in the gradient at the third pahse which is a plausible solution to the problems of this study. Analysis of growth dynamics shows that this point hardly varies, irrespective of the growth class of the clone, and takes place at the sixth year after planting. In addition, several observations on the growth of Hevea under different conditions support the proposal of a minimum tapping girth linked with the growth class, thus combining the notion of age and size.
650			_aTapping norms
650			_aVegetative growth
700			_aBoa D
700			_aDian K
700			_aGohet E
700			_aKeli Z J
700			_aOuattara N
942			_cJS
999			_c57497 _d57497