Kuala Lumpur, Malaysia
Kuala Lumpur, Malaysia

Time filter

Source Type

Mohd-Ridzuwan B.E.,National University of Malaysia | Wan Juliana W.A.,National University of Malaysia | Shaharuddin M.I.,National University of Malaysia | Abd. Rahman A.R.,Jalan Sultan Salahuddin | Latiff A.,National University of Malaysia
Malaysian Forester | Year: 2014

Lianas are very common in tropical rain forests. Unfortunately, our knowledge and understanding of lianas in the primary production forests are very limited and is confined to silvicultural treatments. The present study examined the taxonomic diversity, abundance and distribution of lianas in Berembun Virgin Jungle Reserve, Negeri Sembilan. Four plots of 50m × 50m were established, each plot was divided into 10m × 10m subplots laid out downward perpendicular to the altitudinal gradient. A total of 246 lianas belonging to 23 families, 45 genera and 68 species were identified and listed. The most dominant family was Annonaceae (25%) followed by Leguminosae, Euphorbiaceae, Apocynaceae, Connaraceae, Menispermaceae, Celastraceae, Dilleniaceae and Sterculiaceae. Species-wise Omphalea bracteata (11%) was the most abundant followed by Fibraurea tinctoria, Friesodielsia glauca, Mitrellia kentii, Spatholobus maingayi, S. ferrugineus, Tetracera fagifolia, Byttneria maingayi, Friesodielsia affinis, Millettia sericea, Parameria polyneura, and Pyramidanthe prismatica. Twining-climbing mode represented the dominant group in this study and the majority of lianas were in the smaller diameter class.


Mohd Gani I.Q.L.,Jalan Sultan Salahuddin | Mat Rasat M.S.,University of Malaysia, Kelantan | Wahab R.,University of Malaysia, Kelantan | Ramle N.H.,University of Malaysia, Kelantan | And 3 more authors.
Advances in Environmental Biology | Year: 2014

Regression analysis was carried out from a study conducted to determine factors that affected the production of roundwood in Malaysia from year 2001 to 2010 based on data from Food and Agriculture Organization (FAO) Statistic online database, Forestry Department Peninsular Malaysia (FDPM), Malaysia Timber Industry Board (MTIB) and International Timber Tropical Organization (ITTO). The data have been collected regarding to roundwood production volume, consumption volume, import and export volume to determine the factors that influenced the roundwood production in Malaysia among of them. The result show that the roundwood production in Malaysia significantly affected by roundwood consumption and import, where the regression models obtain the relationship between roundwood production with roundwood consumption (p = 0.000) and roundwood import (p = 0.021). © 2014 AENSI Publisher All rights reserved.


Mohd Zaki H.,University Putra Malaysia | Nazri H.,Jalan Sultan Salahuddin | Azura S.,University Putra Malaysia | Firdaus K.,University Putra Malaysia | And 3 more authors.
Malaysian Forester | Year: 2013

Directional felling has been implemented in Peninsular Malaysia as part of the Selective Management System (SMS) to obtain optimum yield from the forest resources while reducing damage to the environment and residual trees. Some questions regarding its effectiveness have been questioned a few times, resulting in a joint research project at Ulu Jelai Forest Reserve, Pahang, Malaysia to compare between the current directional felling technique and the new (extended) techniques, in terms of accuracy of tree felling, volume of felling logs, expected damage on residual trees, and time taken for tree felling. For this study, 38 trees were felled with the current and extended techniques. By using the extended technique, 91.3% of the trees were felled within the 0°-5° range, and 100% within the 0°-10° range, compared to 28.01% (within the 0°-5° range) using the current technique. The extended technique also recorded higher volume recovery (14% higher) and lower damage on the residual trees by almost 50%. However, the extended technique took longer time, i.e. 4.56 minutes per tree, as compared to 2.50 minutes. The main contributor to the difference is the presence of gauge cut in the extended technique. Generally, the studies suggest that the extended technique is preferred as it is safer to the feller and surrounding people, while reducing the collateral damage on the harvested trees, as well as the residual trees.


Muhammad Said A.H.,University Putra Malaysia | Mohd Zaki H.,University Putra Malaysia | Zahari I.,Jalan Sultan Salahuddin | Nazre M.S.,University Putra Malaysia | And 3 more authors.
Malaysian Forester | Year: 2014

Central Forest Spine (CFS) of Malaysia serves as a corridor for wildlife to move around from one large forest to another to find food, water and shelter. Proposed rehabilitation of pockets of poor forest stands within CFS requires sound knowledge on appropriate tree species and planting technique to ensure its success. The main objectives of this study were to elucidate the vegetation composition, and to propose potential trees species to be planted along the wildlife corridor. A total of 5 plots, each with a radius of 10 metres were set up for this study and focused on three parts of the forest: forest edge (with more-or-less an opened canopy), 'middle' forest (an area between forest edge and closed-canopy forest, and this area is a semi-opened canopy) and forest valley. All trees of more than 5 meters high were recorded in terms of tree species, DBH and number of individuals. Analyses on species composition, the Importance Value Index (IVI) and Simpson's Index Analysis were carried out. The stand is dominated by non-dipterocarps with a very high percentage of 95.88%, with a total of 97 trees and 32 species in 18 families. Dominant species in the study area include Elateriospermum tapos Pternandra echinata, Sapium baccatum and Neolamarckia cadamba with the IVI value 19.47, 14.15, 12.14, and 11.34, respectively. The soil pH of the study area ranged from 3.34 to 6.08; the canopy; closure of (Plot 1) seemed to reduce the pH level, probably due to higher rate of decomposition (after the heavy litter fall). The presence of canopy (Plot 1) also has a positive effect on soil moisture, with highest soil moisture percentage of 25.24% to 27.12%. The potential species recommended for rehabilitation are Elateriospermum tapos, Sapium baccatum, Ficus fulva, Castanopsis inermis, Castanopsis megacarpa, Garcinia nigrolineata and Macaranga hypoleuca because they are readily adapted in the study area and also known to attract wildlife.


Karam D.S.,University Putra Malaysia | Arifin A.,University Putra Malaysia | Radziah O.,University Putra Malaysia | Shamshuddin J.,University Putra Malaysia | And 5 more authors.
The Scientific World Journal | Year: 2012

Deforestation leads to the deterioration of soil fertility which occurs rapidly under tropical climates. Forest rehabilitation is one of the approaches to restore soil fertility and increase the productivity of degraded areas. The objective of this study was to evaluate and compare soil biological properties under enrichment planting and secondary forests at Tapah Hill Forest Reserve, Perak after 42 years of planting. Both areas were excessively logged in the 1950s and left idle without any appropriate forest management until 1968 when rehabilitation program was initiated. Six subplots (20m 20m) were established within each enrichment planting (F1) and secondary forest (F2) plots, after which soil was sampled at depths of 0-15cm (topsoil) and 15-30cm (subsoil). Results showed that total mean microbial enzymatic activity, as well as biomass C and N content, was significantly higher in F1 compared to F2. The results, despite sample variability, suggest that the rehabilitation program improves the soil biological activities where high rate of soil organic matter, organic C, N, suitable soil acidity range, and abundance of forest litter is believed to be the predisposing factor promoting higher population of microbial in F1 as compared to F2. In conclusion total microbial enzymatic activity, biomass C and biomass N evaluation were higher in enrichment planting plot compared to secondary forest. After 42 years of planting, rehabilitation or enrichment planting helps to restore the productivity of planted forest in terms of biological parameters. Copyright 2012 D. S. Karam et al.


Lariyah M.S.,University of Tenaga Nasional | Mohiyaden H.A.,University of Tenaga Nasional | Hayder G.,University of Tenaga Nasional | Hussein A.,University of Tenaga Nasional | And 3 more authors.
IOP Conference Series: Earth and Environmental Science | Year: 2016

This review paper present the MBBR and IFAS technology for urban river water purification including both conventional methods and new emerging technologies. The aim of this paper is to present the MBBR and IFAS technology as an alternative and successful method for treating different kinds of effluents under different condition. There are still current treatment technologies being researched and the outcomes maybe available in a while. The review also includes many relevant researches carried out at the laboratory and pilot scales. This review covers the important processes on MBBR and IFAS basic treatment process, affecting of carrier type and influent types. However, the research concluded so far are compiled herein and reported for the first time to acquire a better perspective and insight on the subject with a view of meeting the news approach. The research concluded so far are compiled herein and reported for the first time to acquire a better perspective and insight on the subject with a view of meeting the news approach. To this end, the most feasible technology could be the combination of advanced biological process (bioreactor systems) including MBBR and IFAS system.


Zulkifli Bin Tukiman D.,Jalan Sultan Salahuddin
Malaysian Forester | Year: 2014

This paper presents the status of growth plots established in logged-over forests by the Forestry Department of Peninsular Malaysia since 1992. A total of 49,218 trees were analyzed with different proportions of diptereocarps and non-dipterocarps in terms of stem number, mortality and ingrowth.


Bakar A.A.A.,University Technology of MARA | Baki A.,University Technology of MARA | Khalil M.K.,Jalan Sultan Salahuddin | Atan I.,University Technology of MARA | Ali M.F.,University Technology of MARA
ISBEIA 2012 - IEEE Symposium on Business, Engineering and Industrial Applications | Year: 2012

Objective of this paper is to present the application of interception model developed in previous study. This model estimates canopy interception loss annually with temporal resolution effects. To derive the equation, precipitation data with different temporal resolutions (ranging from one hour to twenty four hours) and depth of storage capacity varies from 0.1 to 10.0mm were prepared and applied. Parameters to calculate the annual interception loss are the annual precipitation, depth of storage capacity, and the temporal resolution of the data available at the selected locations. Hydrological data with different temporal resolution generated from 28-years hourly hydrological data set is applied to a simple interception model. The effect is significant and is quantified by a newly developed formula which relates the annual canopy evaporation with annual effective potential evaporation, depth of storage capacity, and temporal resolution of the data. The results show that the equation can be applied to estimates annual canopy interception loss. Copyright © 2012 IEEE.

Loading Jalan Sultan Salahuddin collaborators
Loading Jalan Sultan Salahuddin collaborators