Agronomic performance of the clone IRCA 111 of Hevea brasiliensis under different frequencies of tapping and stimulation in South-West Cote dIvoire

Lacote R., . and Soumahin E.F., . and Gabla O., . and Obouayeba S., . and Dobo M., . and Doumbia A., . Agronomic performance of the clone IRCA 111 of Hevea brasiliensis under different frequencies of tapping and stimulation in South-West Cote dIvoire. pp. 93-102. ISSN 1511-1768

Clone IRCA 111 was developed in Cote dIvoire in 1975 to contribute in increasing the rubber production. Nine years of study were conducted on a large scale to identify the optimal tapping system for its exploitation before being released to the producers. The experimental design was that of a Randomised Complete Bloc (RCB). Among the six tapping systems tested ( S d/2 6d/7; S d/3 6d/7. ET 2.5. Pa 1 (1). 4/y; S d/4 6d/7. ET 2.5. Pa 1 (1). 4/y; S d/4 6d/7. ET 2.5. Pa 1 (1). 8/y; S d/5 6d/7. ET 2.5. Pa 1 (1). 8/y and S d/6 6d/7. ET 2.5. Pa 1 (1). 10/y) tapping twice per week with 4 annual stimulations ( S d/3 6d/7. ET 2.5. Pa 1 (1). 4/y) turned out to be the optimal exploitation system for IRCA 111. Nevertheless with a limited number of tappers weekly tapping with 10 annual stimulations ( S d/6 6d/7. ET 2.5 . Pa 1 (1). 10/y) was the most appropriate. The production of rubber per tree and per tapping (g/t/t) was in logarithmic relation with the intensity of tapping. The rate of tapping panel dryness (TPD) was related to the intensity of tapping by a quadratic polynomial function. The study also demonstrated that IRCA 111 had a high yield a fast growth rate and an active metabolism as compared to the standard clone PB 235.

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Abstract

Clone IRCA 111 was developed in Cote dIvoire in 1975 to contribute in increasing the rubber production. Nine years of study were conducted on a large scale to identify the optimal tapping system for its exploitation before being released to the producers. The experimental design was that of a Randomised Complete Bloc (RCB). Among the six tapping systems tested ( S d/2 6d/7; S d/3 6d/7. ET 2.5. Pa 1 (1). 4/y; S d/4 6d/7. ET 2.5. Pa 1 (1). 4/y; S d/4 6d/7. ET 2.5. Pa 1 (1). 8/y; S d/5 6d/7. ET 2.5. Pa 1 (1). 8/y and S d/6 6d/7. ET 2.5. Pa 1 (1). 10/y) tapping twice per week with 4 annual stimulations ( S d/3 6d/7. ET 2.5. Pa 1 (1). 4/y) turned out to be the optimal exploitation system for IRCA 111. Nevertheless with a limited number of tappers weekly tapping with 10 annual stimulations ( S d/6 6d/7. ET 2.5 . Pa 1 (1). 10/y) was the most appropriate. The production of rubber per tree and per tapping (g/t/t) was in logarithmic relation with the intensity of tapping. The rate of tapping panel dryness (TPD) was related to the intensity of tapping by a quadratic polynomial function. The study also demonstrated that IRCA 111 had a high yield a fast growth rate and an active metabolism as compared to the standard clone PB 235.

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Item Type:	Article
AGROVOC Term:	Hevea brasiliensis
AGROVOC Term:	Clones
AGROVOC Term:	Tapping
AGROVOC Term:	Ethephon
AGROVOC Term:	Yields
AGROVOC Term:	Sucrose
AGROVOC Term:	Phosphorus
AGROVOC Term:	Thiols
AGROVOC Term:	Production
AGROVOC Term:	Metabolism
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	24 Apr 2025 06:28
URI:	http://webagris.upm.edu.my/id/eprint/23047

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