Category Archives: นิพนธ์ต้นฉบับ (Original Article)

ESTIMATION OF SOIL LOSS BY USING EROSION BRIDGE : A GUIDE TO SUSTAINABLE FOREST MANAGEMENT

Soil loss estimation by using erosion bridge to be used as aguide to sustainable forest management was conducted in Huai Nam Gud, Khunkong Watershed Research Station, Chiangmai. The extimation of soil loss in each landused type was done, including, shufting cultivation, natural pine forest, pine forest plantation, filled side-slope and forest road to indicate sustainable forest management. The results indicated ... Read More »

THE ROLE AND BEHAVIOR OF SOME MAJOR INSECT POLLINATORS ON POLLINATION OF TEAK FLOWERS (TECTONA GRANDIS LINN.F.)

Studies of the role and behavior of major insect pollinators on pollination of teak flowers (Tectona grandis Linn.f.) were carried out at Maegar Seed Orchard, Phayao Province during July 1998-October 2000. The studies focused on diversity of insects on teak inflorescence, foraging visitors behavior, visitation rate, frequency of each species and amount of pollen grain transferred. The insects visiting on ... Read More »

GENETIC DISCRIMINATION OF EUCALYPTUS CAMALDULENSIS DEHNH. BY DNA FINGERPRINTING

Genetic discrimination of Eucalyptus camaldulensis Dehnh. Was carried out by using random amplified polymorphic DNA (RAPD) fingerprint. There were 38 samples composed of clone S10, clone T5, 14 selfing progenies and 22 outcrossing progenies of both clones. The objectives of this study were to develop technique for genetic discrimination of E. camaldulensis, to discriminate DNA fingerprint among samples and to ... Read More »

MARKETING SYSTEM OF HARDBOARD IN THAILAND

The main objectives of this study were to determine the production, marketing, market structure, market conduct and market performance of hardboard in order to formulate the action plan for forest plantation and marketing of hardboard in the future. The study was conducted by using questionaires. The results of the study indicated that there were 4 hardboard mills. The raw materials ... Read More »

DIVERSITY OF VASCULAR PLANTS IN PHU KHIEO WILDLIFE SANCTUARY, CHAIYAPHUM PROVINCE

A study of vascular plant diversity at Phu Khieo Wildlife Sanctuary, Chaiyaphum Province was conducted from 1 April 1998 through 1 April 1999. The study objectives included surveying vascular plants species, producing a checklist with habits, conservation status and addressing conservation problems. The results indicate that 1,417 vascular plants species, 753 genera, 196 families inhabit this area, comprising of nonseed ... Read More »

EFFECT OF THINNING ON GROWTH AND YIELD OF EUCALYPTUS CAMALDULENSIS DEHNH. PLANTATION

Effect of thinning on growth and yield of Eucalyptus camaldulensis plantation were investigated at Ratchaburi Forest Experiment Station, Ratchaburi Province. The data collection was done during 1992 to 1995 at 1 year before thinning (7-year old) and 2 and 3 years after thinning (9 and 10-year old). The whole experimental site was consisted of 2×2 m. spacing,  4 plots of ... Read More »

DEVELOPMENT OF PARAMETER PREDICTION MODELS FOR PREDICTING THE STAND CHARACTERISTICS OF ACACIA MANGIUM PLANTATIONS

A procedure for predicting diameter distribution of Acacia mangium plantations was developed based on the univariate Sᵦ distribution model. In simulation of stand characteristics, equations were developed for predicting average height, basal area per hectare, and number of tree per hectare surviving when age, spacing and number of trees per hectare planted were known. The predicted stand characteristics were then ... Read More »

EFFECT OF SPACINGS ON GROWTH AND YIELD OF ALSTONIA SCHOLARIS R. BR. PLANTATION

The study on effect of spacing on growth and yield of Alstonia scholaris R. Br. Plantation were carried out with seven spacings, 0.5×0.5m.² , 0.75×0.75m.² , 1×1m.² , 1.5×1.5m.² , 2×2m.² , 4×4m.² , and 6×6m.²  The trees were planted in September 1996 at Trat Agroforestry Research Station, Trat Province. Then, data was collected 4 times in March 1997, October ... Read More »

ECONOMIC INDIRECT USE VALUE IN CARBON DIOXIDE SEQUESTRATION OF TROPICAL RAIN FOREST

This research aimed to evaluate an economic indirect value, in term of CO₂ sequestration, of Pa Krad community forest in Nathawi  District, Songkhla Province. The evaluation method employed in this study was preventive expenditure. The data used was reviewed and derived from several documents published in Thailand and other countries. The economics value of CO₂ sequestration of Pa Krad was ... Read More »

EFFECT OF FIRE ON TEAK BEEHOLE BORER AND ANT DIVERSITY IN YOUNG TEAK PLANTATION

Studies on the effect of fire on teak beehole borer and ant diversity were carried out in four private teak plantations in Lampang and Phayao provinces during 1999-2000. Each plantation was treated as a block with half of each plantation being burnt and the other half being unburned. After the burning of the plots, number of individual were counted. Number ... Read More »