Rubber forest plantations: clones and planting systems

Mohd Nasaruddin Mohd Aris, . (2005) Rubber forest plantations: clones and planting systems. [Proceedings Paper]

There are two types of clones suitable for rubber forest planttaion i.e. latex timber clones and timber clones. In addition results obtained from the rubber forest preliminary clone trial showed that some of the 1995 Hevea germplasm collections were found to be promising. These materials will be further tested prior to recommendation. Four planting densities viz. 500 plants/ha 1000 plants/ha 1500 plants/ha and 2000 plants/ha are being studied for rubber forest plantation. Analysis variance for girth measured at 150cm from the ground p0.01 and estimated cylindrical wood volume p0.05 showed that there were significant differences among the different planting densities and to locate the specific differences that might account for the significance the trend comparison procedure was used where the sum of square of planting densities was partitioned. The highest degree of polynomial that could be tested was cubic. The results indicated significant linear response indicating that girth descreased proportionately with increment of planting density. The results obtained from a two-way analysis of variance using pooled data of both clones showed that there was a significant difference test for RRIM 2020 showed that mean girth at 150 cm from the ground for planting density of 500 plants/ha was significantly different that that of 1000 plants/ha 1500 plants/ha abd 2000 plants/ha. The test carried out on pooled data indicated that there were significant differences between 1000 plants/ha and 2000 plants/ha for RRIM 2020 and RRIM 2025. The least significant difference test for RRIM 2025 showed that the girth measured at 150cm from the ground for planting density of 1500 plants/ha was not significantly different that that of 2000 plants/ha. Girth measurement at the tenth year after planting JUne 2004 was made in observation plots planted with plants at the density of 1111 plants/ha in RRIMinis Niah Sarawak. As far as wood volume is concerned the cyclindral wood volume ranged between 0.08 m3/plant and 0.21 m3 / plant.

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Abstract

There are two types of clones suitable for rubber forest planttaion i.e. latex timber clones and timber clones. In addition results obtained from the rubber forest preliminary clone trial showed that some of the 1995 Hevea germplasm collections were found to be promising. These materials will be further tested prior to recommendation. Four planting densities viz. 500 plants/ha 1000 plants/ha 1500 plants/ha and 2000 plants/ha are being studied for rubber forest plantation. Analysis variance for girth measured at 150cm from the ground p0.01 and estimated cylindrical wood volume p0.05 showed that there were significant differences among the different planting densities and to locate the specific differences that might account for the significance the trend comparison procedure was used where the sum of square of planting densities was partitioned. The highest degree of polynomial that could be tested was cubic. The results indicated significant linear response indicating that girth descreased proportionately with increment of planting density. The results obtained from a two-way analysis of variance using pooled data of both clones showed that there was a significant difference test for RRIM 2020 showed that mean girth at 150 cm from the ground for planting density of 500 plants/ha was significantly different that that of 1000 plants/ha 1500 plants/ha abd 2000 plants/ha. The test carried out on pooled data indicated that there were significant differences between 1000 plants/ha and 2000 plants/ha for RRIM 2020 and RRIM 2025. The least significant difference test for RRIM 2025 showed that the girth measured at 150cm from the ground for planting density of 1500 plants/ha was not significantly different that that of 2000 plants/ha. Girth measurement at the tenth year after planting JUne 2004 was made in observation plots planted with plants at the density of 1111 plants/ha in RRIMinis Niah Sarawak. As far as wood volume is concerned the cyclindral wood volume ranged between 0.08 m3/plant and 0.21 m3 / plant.

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Item Type:	Proceedings Paper
Additional Information:	15 table
AGROVOC Term:	RUBBER
AGROVOC Term:	RUBBER INDUSTRY
AGROVOC Term:	HEVEA
AGROVOC Term:	FOREST PLANTATIONS
AGROVOC Term:	WOOD PRODUCTS
AGROVOC Term:	WOOD
AGROVOC Term:	LATEX
AGROVOC Term:	WEEDING
AGROVOC Term:	CLONING
AGROVOC Term:	MALAYSIA
Geographical Term:	MALAYSIA
Depositing User:	Ms. Norfaezah Khomsan
Last Modified:	24 Apr 2025 05:28
URI:	http://webagris.upm.edu.my/id/eprint/17005

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