Seasonal and clonal variations in the latex and raw rubber of Hevea brasiliensis

Sainte-Beuve J., . and Ehabe E., . and Nkeng J., . and Ngolemasango F., . and Roux Y. L., . and Gobina S., . and Nkengafac J., . Seasonal and clonal variations in the latex and raw rubber of Hevea brasiliensis. pp. 142-156. ISSN 1511-1768

The variation in the quality of raw natural rubber causes serious problems associated with processing and grading with the quality of processed crop varying with changes in season clonal origin and especially with the maturation time of the cuplump material. This study was undertaken to evaluate the contribution of these sources of variation and where possible identify latex physiological parameters as early markers of properties of the processed crumb. Relationships between certain physiological parameters of latex analysed by micro-latex diagnosis technique and some relevant technological properties of the raw rubber were estimated for some selected clones. These were found to be greatly influenced by eco-climatic conditions. Highly significant clonal variations were also observed in the physiological parameters of latex while these variations were not so consistent for most of the technological properties. Finally significant correlations were observed between some technological properties and physiological parameters notably between the inorganic phosphorus and plasticity retention index and between the total solid content and the Mooney viscosity.

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Abstract

The variation in the quality of raw natural rubber causes serious problems associated with processing and grading with the quality of processed crop varying with changes in season clonal origin and especially with the maturation time of the cuplump material. This study was undertaken to evaluate the contribution of these sources of variation and where possible identify latex physiological parameters as early markers of properties of the processed crumb. Relationships between certain physiological parameters of latex analysed by micro-latex diagnosis technique and some relevant technological properties of the raw rubber were estimated for some selected clones. These were found to be greatly influenced by eco-climatic conditions. Highly significant clonal variations were also observed in the physiological parameters of latex while these variations were not so consistent for most of the technological properties. Finally significant correlations were observed between some technological properties and physiological parameters notably between the inorganic phosphorus and plasticity retention index and between the total solid content and the Mooney viscosity.

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Item Type:	Article
AGROVOC Term:	Hevea brasiliensis
AGROVOC Term:	Seasonal variation
AGROVOC Term:	Clonal variation
AGROVOC Term:	Latex
AGROVOC Term:	Natural rubber
AGROVOC Term:	Processing
AGROVOC Term:	Grading
AGROVOC Term:	Rubber crops
AGROVOC Term:	Maturation
AGROVOC Term:	Quality
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	24 Apr 2025 06:28
URI:	http://webagris.upm.edu.my/id/eprint/23215

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