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การประชุมวิชาการThermoluminescence study of quartz from the Sambagawa metamorphic belt, Central Shikoku, Japanผู้แต่ง: Dr.Theeraporn Chuenpee, Lecturer ,  O. Nishikawa, Y. Kon, K. Ninagawa, S. Toyoda, T. Ogata, T. Uchida, I. Takashima, การประชุมวิชาการ:  
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การประชุมวิชาการThermoluminescence and paramagnetic defect of quartz from Sambagawa metamorphic belt, Central Shikoku, Japanผู้แต่ง:Dr.Theeraporn Chuenpee, Lecturer, O. Nishikawa, T. Uchida, T. Ogata, Y. Kon, K. Ninagawa, S. Toyoda, I. Takashima5, การประชุมวิชาการ: |
การประชุมวิชาการThermoluminescence and impurities of quartz from Sambagawa metamorphic belt, central Shikokuผู้แต่ง:Dr.Theeraporn Chuenpee, Lecturer, O. Nishikawa, Y. Kon, K. Ninagawa, S. Toyoda, T. Ogata, T. Uchida, I. Takashima, การประชุมวิชาการ: |
 หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Comparison of Ground-Ant Diversity Between Natural Forests and Disturbed Forests Along a Natural Gas Pipeline Transect in Thong Pha Phum National Park, Kanchanaburi Province ผู้เขียน:วัฒนา ศักดิ์ชูวงษ์, วียะวัฒน์ ใจตรง, Kazuo Ogata สื่อสิ่งพิมพ์:pdf AbstractThe diversity in a natural forest of ground-dwelling ants was compared with that associated with reforestation following disturbance from the construction of a gas pipeline and its corresponding forest canopy and litter loss. Ground-dwelling ants were collected using a pitfall-trap method from plots in natural forest and also from plots in disturbed forest that were 20 m wide along a pipeline transect located in the Thong Pha Phum National Park, Kanchanaburi. The results showed that the canopy cover and amount of litter were associated with species richness and abundance of ants. Canopy cover and litter amount were significantly lower in the disturbed plots than the undisturbed plots (natural forest) in hill evergreen forest plots, but no significant difference was detected between disturbed plots and undisturbed plots located in mixed deciduous forest. Ant species and abundance were significantly higher in undisturbed plots than in disturbed plots in hill evergreen forest, but no statistical difference was found between plots in mixed deciduous forest. Ant species were found to be more similar between plots in mixed deciduous forest than between plots in hill evergreen forest. The results indicated that to maintain ant diversity, the permanent trees in the disturbed area along a pipeline transect are very important. |
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หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Ant Diversity in Forest and Traditional Hill-Tribe Agricultural Types in Northern Thailand) ผู้เขียน:วัฒนา ศักดิ์ชูวงษ์, วียะวัฒน์ ใจตรง, Kazuo Ogata สื่อสิ่งพิมพ์:pdf AbstractThis study investigated the impacts of traditional hill-tribe agricultural systems on biodiversity conservation. It compared the abundance and diversity of ants across a gradient of different types of land use in northern Thailand: tropical montane forest (MF); jungle converted to tea plantation (JT); ex forest left fallow for one year (F1); ex forest left fallow for eight years (F8 - the traditional hill-tribe agricultural system); and permanent agriculture (C -growing cabbages as an annual crop). Ants were collected from the uppermost 20 cm of the ground, covering the soil to the upper litter in eight 30 cm2 quadrats from the different types of land use during a range of seasons at each site. A total of 12,006 ants were collected, representing 130 species from 48 genera in seven subfamilies. JT had the highest average number of species followed by MF, F8, F1 and C, respectively. There were significant differences in the number of ant species among types of land use and seasons, but no significant difference in the abundance of ants was found among land use systems. The results indicated that jungle tea land use maintained a significantly greater species-richness than any of the forest-fallow or annual-crop land uses in the highlands. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Induction of Budbreak in Apple Trees that Received Insufficient Chilling by Hydrogen Cyanamide) ผู้เขียน:ดร.กฤษณา กฤษณพุกต์, รองศาสตราจารย์ , ดร.สุรนันต์ สุภัทรพันธุ์, ศาสตราจารย์, Ryosuke Ogata สื่อสิ่งพิมพ์:pdf AbstractVarious concentrations of hydrogen cyanamide were applied to “Anna” apple to induce budbreak at the time when the trees were in dormant stage. The optimum concentration of hydrogen cyanamide to induce good budbreak was 2.5% High concentrations of hydrogen cyanamide were noticed to be toxic by dried dead shoots. ‘Tsugaru’ appli trees at different dormant stages kept in the heated glasshouse (minimum temperature was 15?C) were treated with 2.5% hydrogen cyanamide plus 50% ‘Merit’, a foliar fertilizer. It was found that the mixer of hydrogen cyanamide and ‘Merit’ could relatively induce budbreak even when buds were in the deepest dormant stage, when compared with the buds in lesser dormant stage. Buds from ‘Tsugaru’ apple trees treated or not treated with 2.5% hydrogen cyanamide were analyzed for abscisic acid (ABA) content. It was found that three days after treatment, ABA content in buds treated with hydrogen cyanamide was two times lower than that in the untreated buds. This result suggested that hydrogen cyanamide may induce budbreak by decreasing ABA content. |