Panel management in rubber (Hevea brasiliensis) tapping and impact on yield growth and latex diagnosis

Clement-Demange A., . and Obouayeba S., . and Dian K., . and Gnagne M., . and Lacote R., . and Gohet E., . Panel management in rubber (Hevea brasiliensis) tapping and impact on yield growth and latex diagnosis. pp. 199-217. ISSN 1511-1768

This study investigates the impact of four tapping-panel management strategies on cumulative yield growth and laticifer physiology of trees. These strategies were applied to clones PB 260 GT 1 PB 217 and AF 261 belonging to fast moderate and low metabolic activity during nine years insouth-eastern Cote dlvoire. The reaction of clones to tapping systems was often dependent on their class of metabolic activity. For all clones panel management strongly influenced the annual yield. After nine years however the cumulative rubber yield did not vary with panel strategy for PB 260 GT 1 and PB 217. Only clone AF 261 a low-yielding clone not recommended for planting showed different behaviour. Panel management did not influence the girth increment of trees at nine yearsfor all clones except for GT 1. For this clone no panel changing management was more favourableto girth increment than the other strategies. The yield and growth results confirm the known negative relationship between yield and girth increment of the trunk. Physiology of the latex cell was influenced by the panel-management strategies for each period of tapping. Latex diagnosis could beused for monitoring year-to-year consecutive tapping on the same panel to decide whether tochange to the other panel if any important physiological stress was detected.

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Abstract

This study investigates the impact of four tapping-panel management strategies on cumulative yield growth and laticifer physiology of trees. These strategies were applied to clones PB 260 GT 1 PB 217 and AF 261 belonging to fast moderate and low metabolic activity during nine years insouth-eastern Cote dlvoire. The reaction of clones to tapping systems was often dependent on their class of metabolic activity. For all clones panel management strongly influenced the annual yield. After nine years however the cumulative rubber yield did not vary with panel strategy for PB 260 GT 1 and PB 217. Only clone AF 261 a low-yielding clone not recommended for planting showed different behaviour. Panel management did not influence the girth increment of trees at nine yearsfor all clones except for GT 1. For this clone no panel changing management was more favourableto girth increment than the other strategies. The yield and growth results confirm the known negative relationship between yield and girth increment of the trunk. Physiology of the latex cell was influenced by the panel-management strategies for each period of tapping. Latex diagnosis could beused for monitoring year-to-year consecutive tapping on the same panel to decide whether tochange to the other panel if any important physiological stress was detected.

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Item Type:	Article
AGROVOC Term:	Hevea brasiliensis
AGROVOC Term:	Tapping
AGROVOC Term:	Yields
AGROVOC Term:	Growth
AGROVOC Term:	Diagnosis
AGROVOC Term:	Latex
AGROVOC Term:	Rubber crops
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	24 Apr 2025 06:28
URI:	http://webagris.upm.edu.my/id/eprint/23137

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