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 ผลงานตีพิมพ์ในวารสารวิชาการHabitat divergence in sympatric Fagaceae tree species of a tropical montane forest in northern Thailandผู้แต่ง: Noguchi, Hideyuki, Itoh, Akira, Mizuno, Takashi, Sri-Ngernyuang, Kriangsak, Kanzaki, Mamoru,  Dr.Sakhan Teejuntuk, Assistant Professor , Sungpalee, Witchaphart, Hara, Masatoshi, Ohkubo, Tatsuhiro, Mr.Pongsak Sahunalu, Professor , Mr.Pricha Dhanmanonda, Associate Professor, Yamakura, Takuo, วารสาร: 
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ผลงานตีพิมพ์ในวารสารวิชาการIntra- and interspecific variation in wood density and fine-scale spatial distribution of stand-level wood density in a northern Thai tropical montane forestผู้แต่ง:Sungpalee, W, Itoh, A, Kanzaki, M, Sri-Ngernyuang, K, Noguchi, H, Mizuno, T, Dr.Sakhan Teejuntuk, Assistant Professor, Hara, M, Chai-Udom, K, Ohkubo, T, Sahunalu, P, Dhanmmanonda, P, Nanami, S, Yamakura, T, Sorn-Ngai, A, วารสาร:  |
ผลงานตีพิมพ์ในวารสารวิชาการAntibiotic resistance profiles of soil bacterial communities over a land degradation gradientผู้แต่ง:Doi, R, Mr.Pongsak Sahunalu, Professor, Wachrinrat, C, Dr.Sakhan Teejuntuk, Assistant Professor, Sakurai, K, วารสาร: |
ผลงานตีพิมพ์ในวารสารวิชาการSemiquantitative color profiling of soils over a land degradation gradient in Sakaerat, Thailandผู้แต่ง:Doi, R, Wachrinrat, C, Dr.Sakhan Teejuntuk, Assistant Professor, Sakurai, K, Mr.Pongsak Sahunalu, Professor, วารสาร: |
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 หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Comparison of Growth Rate of Crossbred Goats on Different Rearing Systems) ผู้เขียน:นายปรีชา ธรรมานนท์, รองศาสตราจารย์, นายพงษ์ศักดิ์ สหุนาฬุ, ศาสตราจารย์ สื่อสิ่งพิมพ์:pdf AbstractGrowth rate of crossbred kids were compared under different rearing systems during preweaning and post-weaning periods. During pre-weaning period, 12 newborn crossbred kids were randomly assigned to two treatments. The first treatment, five newborn kids, 2 males and 3 females, were fed with powder milk; while this in the second treatment, seven newborn kids, 3 males and 4 females, were allowed to be with their dams up to 3 month. Weight gains for treatment 1 and 2 were 4.78 + 0.58 kg; 5.32 + 1.20 kg; respectively, while average daily gain were 53.10 + 6.45 gm; 59.20 + 13.31 gm; the difference was not significant. During post-weaning period, these kids compared under two different rearing systems i.e., stall vs. pasturing feeding. It was found that after 4 months of experimental period, weight gain and average daily gain of stall feeding were 4.90 + 2.56 kg. and 53.84 + 28.15 gm. Respectively. Where as for the pasturing system, weight gain and average daily gain were 6.31 + 1.16 kg. and 69.38 + 12.79 gm. Respectively. The differences between the two feeding systems were not significantly different. |
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ที่มา:วารสารการจัดการป่าไม้หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Spatial Distribution and Size Structure Patterns of Tree Species in the Long-term Dynamic Plots of Sakaerat Deciduous Dipterocarp Forest, Northeastern Thailand) ผู้เขียน:นายพงษ์ศักดิ์ สหุนาฬุ, ศาสตราจารย์ สื่อสิ่งพิมพ์:pdf AbstractAll tree individuals (DBH ? 4.5 cm) in the 4 stands of each 1 ha square plots in Sakaerat deciduous dipterocarp forest (SDDF) established for the long-term dynamic studies were investigated to clarify their spatial distributional patterns in forms of I-delta (I?) index following the Morisita’s procedure by several quadrat size expansions. Frequency distribution of tree individuals in each DBH class (5 cm interval) or size structure distributional pattern in the 4 stands were also analyzed and two negative function models (power function and exponential function) were tested to get the best fit of the two models. Results of the studies reveal that most of the major tree species in the 4 stands are found to distribute in clumping pattern by showing I? values above 1, while the overall individuals in every stands are in random pattern with I? values closed to 1, regardless of any plot size enlargement. Size structure of all tree individuals in this forest is found to display an explicit form of the negative exponential pattern explaining its relatively stable size structure even though they are quite sparsely distributed in each stand. Some dominant tree species in all 4 stands are found to have both L and B-shaped distributional patterns of size structure except for the rest ones that no specific patterns are found in this SDDF type. |
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หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Botryodiplodia Stem End Rot of Mango and Its Control) ผู้เขียน:นายปรีชา ธรรมานนท์, รองศาสตราจารย์, นายพงษ์ศักดิ์ สหุนาฬุ, ศาสตราจารย์ สื่อสิ่งพิมพ์:pdf AbstractBotrydiplodia theobromae, the causal organism of stem end rot disease of mango was studied. Isolates of B. theobromae obtained from different sources had different degree of disease severity. Isolate from diseased mango fruit was whe most virulent isolate. Six cultivars of mango were tested on their susceptibility. Okrong was the most susceptible cultivar. Length of pedicel also had an effect on disease development. Disease developed slower on the fruit with longer pedicel than on the shorter one. Control measure of the disease with different means indicated that dipping the fruits in benomyl at concentration of 500 ppm at 52 C for 5 minutes was the most effective mean. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Botanical Repellent Against the Diamondback Moth, Plutella xylostella L.) ผู้เขียน:นายปรีชา ธรรมานนท์, รองศาสตราจารย์, นายพงษ์ศักดิ์ สหุนาฬุ, ศาสตราจารย์ สื่อสิ่งพิมพ์:pdf AbstractThe present study reveals two Thai plant species, i.e. Scheffera venulosa Harms (Hanumarn-prasanguy) and Cymbopogon nardus Rendle (Takraihorm) containing some quantities of repellent chemicals. These chemicals affected the diamondback moth larvae under the laboratory conditions. Both of them, moreover, showed an equal magnitude of repelling activity. |
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