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Thaung Naing Oo,이돈구,Marilyn Combalicer 한국산림과학회 2007 한국산림과학회지 Vol.96 No.5
Forest plantations become important strategy not merely for the financial aspect, but for carbonsequestration and ecosystem stability. Forest plantations increase the density of the forest biomas, whichreduce the increase in atmospheric carbon dioxide. Biomass density is also a useful variable for comparingIn this study, carbon sequestration of teak (Tectona grandis Linn. f.) in the individual tree and plantationlevels estimation was carried out. Site-specific alometric equation for the estimation of teak tree biomasswas developed based on the direct measurement of fifteen (15) harvested tres in the Oak-twin Townshipof the Bago Yoma Region, Myanmar. A regresion equation of the diameter at breast height (DBH) andthe aboveground biomass (carbon content) was constructed to estimate the carbon storage level ofwas estimated 38.89 ton/ha. The highest mean annual increment (MAI) of total carbon was found in the6-yr-old teak plantation (12.10 ton/ha/yr) whereas the lowest MAI was in the 26-yr-old teak plantation (4.31ton/ha/yr).
Oo, Thaung Naing,Lee, Don Koo,Combalicer, Marilyn Korean Society of Forest Science 2007 한국산림과학회지 Vol.96 No.5
Forest plantations become important strategy not merely for the financial aspect, but for carbon sequestration and ecosystem stability. Forest plantations increase the density of the forest biomass, which reduce the increase in atmospheric carbon dioxide. Biomass density is also a useful variable for comparing structural and functional attributes of forest ecosystems across a wide range of environmental conditions. In this study, carbon sequestration of teak (Tectona grandis Linn. f.) in the individual tree and plantation levels estimation was carried out Site-specific allometric equation for the estimation of teak tree biomass was developed based on the direct measurement of fifteen (15) harvested trees in the Oak-twin Township of the Bago Yoma Region, Myanmar. A regression equation of the diameter at breast height (DBH) and the aboveground biomass (carbon content) was constructed to estimate the carbon storage level of plantations, which averaged 79 ton/ha. The average carbon accumulation in the soil (up to 30 cm in depth) was estimated 38.89 ton/ha, The highest mean annual increment (MAI) of total carbon was found in the 6-yr-old teak plantation (12.10 ton/ha/yr) whereas the lowest MAI was in the 26-yr-old teak plantation (4.31 ton/ha/yr).
Oo, Thaung Naing,Lee, Don Koo,Park, Yeong Dae Korean Society of Forest Science 2008 한국산림과학회지 Vol.97 No.5
Enrichment planting has been used as one of the promising restoration techniques to accelerate the natural restoration process of secondary forests or logged-over forests in Myanmar, The objectives of this study were to examine the growth performances of two commercial species such as Teak (Tectona grandis Linn f.) and Padauk (Pterocarpus macrocarpus Kurz) in response to different canopy opening treatments and to examine the suitability of these species in enrichment planting activities for the restoration of degraded tropical forests in Myanmar. In this study, split plot design was applied, and three levels of canopy openings were experimented. The survival rate and height growth of two species were measured four times with 6 month interval. The root collar diameter (RCD) was also measured in the last assessment. Although the survival rate of seedlings was not significantly different among the three treatments (p>0.05) as well as between two species (p>0.05) for all consecutive measurements, height (p<0.05) and RCD were significantly different (p<0.001) among the treatments, T. grandis seedlings thrived best under complete canopy opening (i.e., 5 m width canopy opening with strip-clear cutting) while P. macrocarpus seedlings under partial canopy opening (without felling of marketable tree species). Because this study is concerned with only for young stage of seedlings, continuous assessment and follow-up tending activities are needed to verify the species suitability and optimum width of canopy opening for enrichment planting activities in restoration of degraded forests of Myanmar.
Species Diversity, Composition and Stand Structure of Tropical Deciduous Forests in Myanmar
Oo, Thaung Naing,Lee, Don Koo,Combalicer, Marilyn,Kyi, Yin Yin Korean Society of Forest Science 2008 한국산림과학회지 Vol.97 No.2
The characterization of tree species and forest stand conditions is useful in the planning of activities aimed to conserve biodiversity. The main objective of this study was to describe tree species diversity, species composition and stand structure of tropical deciduous forests distributed in three regions in Myanmar. Forest inventory was conducted in the Oktwin teak bearing forest, the Letpanpin community forest and Alaungdaw Kathapa National Park. According to the Jackknife estimator of species richness, 85 species (${\pm}18.16$), 70 species (${\pm}5.88$) and 186 species (${\pm}17.10$) belonging to 31 families were found in the Oktwin teak bearing forest, 33 families in Letpanpin community forest and 53 families in Alaungdaw Kathapa national park, respectively. Shannon's diversity indices were significantly different among the forests (p<0.05). It ranged from 3.36 to 4.36. Mean tree density (n/ha) of the Oktwin teak bearing forest, Letpanpin community forest and Alaungdaw Kathapa National Park were 488 (${\pm}18.6$), 535 (${\pm}15.6$) and 412 (${\pm}14.1$), while basal areas per hectare were $46.96m^2({\pm}3.23),\;49.01m^2({\pm}5.08)\;and\;60.03m^2({\pm}3.88)$, respectively. At the family level, Verbenaceae, Myrtaceae and Combretaceae occupied the highest importance value index, while at the species level it was Tectona grandis, Lagerstoremia speciosa and Xylia xylocarpa.
Oo, Thaung Naing,Lee, Don Koo Korean Society of Forest Science 2007 한국산림과학회지 Vol.96 No.5
Tree species diversity is an important aspect of forest ecosystem stability. Tree species inventories at defined sites and in minimum diameter classes give a reliable indicator of the diversity level as well as the structural stability level of a study site. This study was conducted to investigate the species composition and the stand structure of the natural forest, timber-harvested forest (logged-over forest) and degraded forest of the Oak-twin Township in the Bago Yoma Region of Myanmar. Natural forest showed the highest family and species richness in all the investigated forests. At the family level, Verbenaceae occupied the highest importance value index (IVI) in all the forest stands while teak (Tectona grandis Linn. f.) occupied the highest IVI at the species level. However, the small diameter classes of T. grandis and other commercial species were less than those of big diameter classes in all the investigated forests. This abnormal pattern of diameter distribution could be a problem for the sustainable production of commercial timber species in the near future.
( Hay Marn Thaung ),( Jewel Andoh ),( Yohan Lee ) 한국산림경제학회 2017 산림경제연구 Vol.24 No.1
Deforestation of riparian forest buffers is rapidly increasing in Myamnar, particularly around the Inle Lake, due to agricultural expansion. This paper used the contingent valuation method to examine household`s willingness to pay (WTP) for the conservation of riparian forest buffer zones around the Inle Lake in the Nyaung Township. Personal interview through a double-bounded dichotomous choice questionnaire was used to obtain data from 270 households in 9 villages living along the riparian forest buffer zones. Results show that 100% of the households are willing to pay an average bid of 20,402 Kyats (US$ 17.3) annually to conserve the riparian forest buffer zones. However, by gender differentials, the results revealed that males (47.4%) and females (52.6%) are willing to pay an average amount of 21,625 Kyats (US$18.41) and 21,023 Kyats (US$17.9) per year respectively. Also, age was observed to have a significant influence on household`s WTP. The govermnent should provide public awareness on the role of conservation of riparian forests buffer and also, train local people in the region to adopt good agricultural practices such as agroforestry and non-timber forest products to reduce the rate of deforestation and degradation of the Inle Lake.