Journal Issue: EnNRJ Vol. 7 No. 2
Issued Date
2009
Resource Type
Language
tha
eng
eng
File Type
application/pdf
Access Rights
open access
Rights
ผลงานนี้เป็นลิขสิทธิ์ของมหาวิทยาลัยมหิดล ขอสงวนไว้สำหรับเพื่อการศึกษาเท่านั้น ต้องอ้างอิงแหล่งที่มา ห้ามดัดแปลงเนื้อหา และห้ามนำไปใช้เพื่อการค้า
Rights Holder(s)
Faculty of Environment and Resource Studies Mahidol University
Journal Volume
EnNRJ Volume 7
(2009)
Articles
The estimation of Carbon storage in Dry Evergreen and Dry Dipterocarp Forests in Sang Khom District, Nong Khai Province, Thailand
(2009-12) Phouveth Senpaseuth; Charlie Navanugraha; Sura Pattanakiat; Mahidol University. Faculty of Environment and Natural Resource Studies
The objectives of this study were to identify the plant community characteristics and estimate and
compare the carbon storage in dry evergreen and dry dipterocarp forests, including with soil (physical
and chemical) properties, in Sang Khom district, Nong Khai province. Six temporary sample plots
(20×50 m2) were designed to collect data as the study area. The biomass of plant species was
estimated from each of the tree components, both aboveground (stem, branch and leave) and
belowground (root) portions, by using allometric equation. The biomass of the groundcover was also
collected and evaporated by oven drying at 80oC for 3-5 hours or until it was at a constant weight.
Then the dried weight was used to estimate the biomass content. The carbon in the biomass of the
aboveground, belowground portions of the trees and the biomass of the ground cover on the soil
surface were calculated by multiplying with a conversion factor at 0.5. In additions, the soil properties
and soil organic carbon were analyzed. The results of this study showed that the plant community characteristic of dry evergreen and dry dipterocarp forests looked like a sparse forest, while the total carbon contents of both forest types were mostly different, especially, the aboveground carbon contents which were identified as the greatest amount of carbon contents. However, the total carbon content of dry evergreen forest was more than dry dipterocarp forest: they were 31,442.01 and 15,096.17 kg/rai, respectively. The aboveground (stem, branch and leave), belowground (root and soil) and ground cover carbon content of the dry evergreen forest was about 23,737.05, 7,682.26 and 22.71 Kg/rai, respectively. The aboveground (stem, branch and leave), belowground (root and soil) and ground cover carbon content of the dry dipterocarp forest was about 9,505.00, 5,578.57 and 12.61 kg/rai, respectively.
Plant diversity in home gardens and its contribution to household economy in suburban areas in Sri Lanka
(2009-12) Sandya Kumari, M.A.; Kulvadee Kansuntisukmongkol; Brockelman, Warren Y.; Mahidol University. Faculty of Environment and Natural Resource Studies; Mahidol University. Faculty of Graduate Studies
Plant diversity is threatened by rapid and unplanned urbanization, which increases environmental problems such as heating, pollution, loss of habitats and ecosystem disruption. Tropical home gardens have played a significant role in conserving plant diversity while providing substantial benefits to households. This research aimed to understand the relationship between household characteristics and plant diversity in suburban home gardens and the contributions of plants to the household economy. Plant diversity and different uses of plants were studied in a random sample of 106 suburban home gardens in the Thimbirigaskatuwa suburban area, Katana Divisional Secretariat Division, western Sri Lanka, based on complete garden inventories followed by household surveys on socio-economic status during 2008. A total of 289 species of plants were observed, of which 51% were ornamental plants, 36% food plants, and 12% medicinal plants. Of these 6% were sold commercially to produce income. Coconuts, bananas, and other fruits produced in excess, anthurium, orchids, and dracaenas were used and sold commercially. Home gardens contributed the equivalent of 5% of total annual household income in terms of food and commercial sales. Multiple regression analysis showed that education, time spent in gardening, land for cultivation, household expenses, primary conservation practices, and uses of special techniques explained 65% of the total plant diversity. Food, medicinal and commercial plant species had significant positive relationships with time spent gardening and land area for gardening. Education and conservation practices significantly affected food and medicinal plant diversity. Special techniques used in gardening showed significant positive relations with ornamental and commercial plants. Reassessments in different suburban and urban home gardens and proper documentation using same methodology is essential to build a firm policy for enhancing plant diversity and related values to households and surroundings.
The potential of the industrial sector in implementing ISO 14001: 2004 in Vientiane, Lao P.D.R.
(2009-12) Somlith Lithsana; Sayam Aroonsrimorakot; Kraichat Tantrakarnapa; Mahidol University. Faculty of Environment and Natural Resource Studies; Mahidol University. Faculty of Public Health
This research aims to study the potential of the industrial sector and factors affecting the implementation of ISO 14001:2004. The total number of representative samples which were selected through simple random sampling from 329 locations in the capital Vientiane. Most samples included senior executives, general managers or division heads. The data were drawn from the questionnaire survey, of which 320 or 97.27 percent were completed and returned. According to the study 9 indicators which are used to determine the factory’s potential level. There are 5 indicators at the medium level that executive’s demands for the ISO 14001:2004 system; technology for pollution control; budget allocation for environmental management; environmental problems prevention; and maintenance of machinery. Understanding ISO 14001:2004 ; potential of employees; environmental planning; and trainings for staff on ISO 14001:2004 are at a low level. It was found that the factors affecting the ISO 14001:2004 implementation were education level, other certificates and factory fuel utilization, which are related to factory potential level at the statistically significant 0.05. Key words: factory potential / ISO 14001:2004 / Vientiane Lao P.D.R.
Lime and Lignite Fly Ash as cement replacement in hazardous waste solidification process: Case study of spent fluorescent lamp
(2009-12) Petcharat Jekjuntuk; Chumporn Yuwaree; Gritsanaruk Theeraraj; Rungjarat Hutacharoen; Jirapun Chotiratanarak; Mahidol University. Faculty of Environment and Natural Resource Studies
The main objective of this research is aimed at the usage of lignite fly ash (power plant) and lime as
cement replacement in hazardous - waste solidification process of spent fluorescent lamp. The study
found that the increasing of waste ratio in solidification process has the trend to increase density and
mercury leaching concentration. Different binder ratios and waste ratios produced different strength
effects on the solidified sample. Mercury leaching concentration decreased with increasing curing
times, whereas the density and the strength trend to decrease after 14 days. In consideration the
properties of solidified sample and cost of solidifying material, a ratio of cement to lime to fly ash of
0:30:70 was found to be the most optimum ratio for solidifying spent fluorescent lamps (at a ratio of
spent fluorescent lamp to binder of 2:1), with curing time more than 7-days. Accordingly, it is
reasonable to assume lime and lignite fly ash are considerably better for use as a cement replacement
alternative for spent fluorescent lamp solidification.
The estimation of Carbon storages in various growth stages of sugarcane in Si Sat Chanalai District, Sukhothai Province, Thailand
(2009-12) Wachirawan Watcharapirak; Sura Pattanakiat; Charlie Navanugraha; Mahidol University. Faculty of Environment and Natural Resource Studies
The objectives of this research was to estimate carbon storage in sugarcane plantation in Si satchanalai
district, Sukhothai province in one crop yield. The various growth stages of sugarcane were studied at
aboveground and belowground. In addition, carbon storage in soil was studied in upper soil horizon.
The carbon storage of the sugarcane plantation was analyzed both in plant and soil. The carbon
storage in plant was estimated from biomass and organic carbon percentage in each part of the plant
(leaves, stems roots and ground cover). The estimation of carbon content in each part of the plant was
done by oven drying at 85°C until it was at constant weight. The percentage of organic carbon in
plants was estimated by Titration method. Soil carbon contents were estimated at the upper soil
horizon by Walkley and Black method.The results showed that the carbon storage in the tillering stage
was 4,214.09 kg/rai, the carbon contents of sugarcane trees was 357.56 kg/rai, ground surface was
40.43 kg/rai and in upper soil horizon was 3,816.10 kg/rai. In the stalk elongation stage the results
showed that the carbon storage in one crop yield was 7,648.37 kg/rai, the carbon contents in sugarcane
trees was 702.38 kg/rai, ground surface was 50.43 kg/rai and in upper soil horizon was 6,895.55
kg/rai. In the maturity & ripening stage, the results showed that the carbon storage in one crop yield
was 8,653.46 kg/rai, the carbon contents in sugarcane trees was 1,737.92 kg/rai, ground surface was
86.30 kg/rai and in upper soil horizon was 7,193.24 kg/rai. However, it was found that the carbon
storage content of a sugarcane plantation in one crop yield consists of the carbon storage in sugarcanes
and the organic carbon deposit in the soil was increased when the sugarcane trees grew.
Title
EnNRJ Vol. 7 No. 2
Author's Affiliation
Mahidol University. Faculty of Environment and Resource Studies
มหาวิทยาลัยมหิดล. คณะสิ่งแวดล้อมและทรัพยากรศาสตร์
มหาวิทยาลัยมหิดล. คณะสิ่งแวดล้อมและทรัพยากรศาสตร์
Keyword(s)
Climate change
Biodiversity
Disaster
Ecological
Environmental modelling
Environmental dynamics
Environmental pollution
Emerging contaminants
Transboundary pollution
Waste and wastewater treatments
Hazardous wastes
Natural resource management
Multidisciplinary sciences
Environment and Natural Resources Journal
Biodiversity
Disaster
Ecological
Environmental modelling
Environmental dynamics
Environmental pollution
Emerging contaminants
Transboundary pollution
Waste and wastewater treatments
Hazardous wastes
Natural resource management
Multidisciplinary sciences
Environment and Natural Resources Journal