Survey of tree dryness on panels BO-1 and BO-2 of clone PB260

Chan Weng Hoong, . Survey of tree dryness on panels BO-1 and BO-2 of clone PB260. pp. 55-65. ISSN 0126-575X

In the study the incidence of dryness was higher in PB260 compared to PB217 and GT1. On panel BO-1 mean dryness ranged from 2.1 percent in the first year to 8.5 percent in the sixth year of tapping compared with 0.2 to 2.7 percent in the first and fourth year respectively for PB217. On panel BO-2 the range was 16.0 to 18.6 percent from the third to sixth year compared with only 8.1 percent in the third year for GT1. The maximum dryness in individual fields of PB260 however reached 23.5 percent on panel BO-1 and 44.6 percent on panel BO-2 which is considered very high. Rainfall pattern and depth of soil strongly influenced the extent of dryness in clone PB260. Tree dryness was highest on shallow soils located in Kedah Kelantan and Negeri Sembilan where a regular dry season lasting three to four months exists and where moisture deficits are most likely to occur. On the other hand low incidence of dryness was observed on deep soils located in Perak Selangor Pahang and Johor where climatic conditions are more favourable and moisture deficits are more likely to be less severe or even absent. Tree dryness more than 10 percent on panel BO-1 and 15 percent on panel BO-2 is considered high. All areas except deep soils in the states of Perak Selangor Pahang and Johor have exceeded the above figures. The remedial measures proposed to minimise tree dryness include reduction in tapping intensity and increasing the stand per hectare for locations with high propensity to tree dryness

Full text available from:

Abstract

In the study the incidence of dryness was higher in PB260 compared to PB217 and GT1. On panel BO-1 mean dryness ranged from 2.1 percent in the first year to 8.5 percent in the sixth year of tapping compared with 0.2 to 2.7 percent in the first and fourth year respectively for PB217. On panel BO-2 the range was 16.0 to 18.6 percent from the third to sixth year compared with only 8.1 percent in the third year for GT1. The maximum dryness in individual fields of PB260 however reached 23.5 percent on panel BO-1 and 44.6 percent on panel BO-2 which is considered very high. Rainfall pattern and depth of soil strongly influenced the extent of dryness in clone PB260. Tree dryness was highest on shallow soils located in Kedah Kelantan and Negeri Sembilan where a regular dry season lasting three to four months exists and where moisture deficits are most likely to occur. On the other hand low incidence of dryness was observed on deep soils located in Perak Selangor Pahang and Johor where climatic conditions are more favourable and moisture deficits are more likely to be less severe or even absent. Tree dryness more than 10 percent on panel BO-1 and 15 percent on panel BO-2 is considered high. All areas except deep soils in the states of Perak Selangor Pahang and Johor have exceeded the above figures. The remedial measures proposed to minimise tree dryness include reduction in tapping intensity and increasing the stand per hectare for locations with high propensity to tree dryness

[error in script]

Item Type:	Article
Additional Information:	Summary (En)
AGROVOC Term:	PLANTAS LACTIFERAS
AGROVOC Term:	HEVEA BRASILIENSIS
AGROVOC Term:	ESTACION SECA
AGROVOC Term:	TIPOS DE SUELOS
AGROVOC Term:	RESINACION
Depositing User:	Ms. Norfaezah Khomsan
Last Modified:	24 Apr 2025 05:51
URI:	http://webagris.upm.edu.my/id/eprint/17107

Actions (login required)

View Item