 ผลงานตีพิมพ์ในวารสารวิชาการThree-year monitoring results of nitrate and ammonium wet deposition in thailandผู้แต่ง: Paramee, S, Chidthaisong, A, Towprayoon, S, Asnachinda, P, Bashkin, VN,  Dr.Nipon Tangtham, Professor , วารสาร: 
|
ผลงานตีพิมพ์ในวารสารวิชาการCarbon and Water Cycling in Two Rubber Plantations and a Natural Forest in Mainland Southeast Asiaผู้แต่ง:Wang, X., Blanken, P.D., Dr.Poonpipope Kasemsap, Associate Professor , Petchprayoon, P., Thaler, P., Nouvellon, Y., Gay, F., Chidthaisong, A., Sanwangsri, M., Dr.Chompunut Chayawat, Chantuma, P., Mr.Jate SATHORNKICH , Kaewthongrach, R., Dr.Duangrat Satakhun, Dr.Jessada Phattaralerphong, Lecturer , วารสาร: 
|
ผลงานตีพิมพ์ในวารสารวิชาการSolar-induced chlorophyll fluorescence detects photosynthesis variations and drought effects in tropical rubber plantation and natural deciduous forestsผู้แต่ง:Wang, X., Blanken, P.D., Wood, J.D., Nouvellon, Y., Thaler, P., Dr.Poonpipope Kasemsap, Associate Professor, Chidthaisong, A., Petchprayoon, P., Chayawat, C., Xiao, J., Li, X., วารสาร: |
|
 |
 หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Lead (Pb2+) Removal from Wastewater by the Cyanobacterium Calothrix marchica) ผู้เขียน:Suneerat Ruangsomboon, Amnat Chidthaisong, Boosya Bunnag, Duangrat Inthorn, Narumon W. Harvey สื่อสิ่งพิมพ์:pdf AbstractPb2+ removal ability of the living-freshwater cyanobacterium C. marchica was studied in batch experiments. The result showed that adsorption of Pb2+ by C. marchica reached equilibrium within 60 min. The amount of Pb2+ adsorbed (qeq) increased when cyanobacterial age increased. At lower biomass concentration cyanobacterium showed higher qeq than that at high biomass concentration. Elevated temperature increased Pb2+ adsorbed by C. marchica. The Langmuir adsorption isotherm fitted the results better than the Freundlich isotherm and, thus, was more suitable to describe Pb2+ adsorption by C. marchica. C. marchica had Pb2+ binding capacity (qmax) of 74.04 mg g-1, and indicators of adsorption capacity (Kf) of 18.01. Pb2+ removal under light and dark conditions was not significantly different. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Carbon Stock and Net CO2 Emission in Tropical Upland Soils under Different Land Use) ผู้เขียน:Natthaphol Lichaikul, Amnat Chidthaisong, Narumon Withers Havey, จงรัก วัชรินทร์รัตน์ สื่อสิ่งพิมพ์:pdf AbstractCarbon storage and CO2 emissions were measured during May 2003-February 2004 in three land use types in northeastern Thailand. These included a natural dry evergreen forest (DEF), a reforestation planted with 16-years old Acacia mangium (AC) and a cornfield site (CF). The main objective was to estimate and compare carbon stock as affected by land use type. On the area-basis, the estimated of carbon storages in the upper 50 cm-layer of soil were 118, 66 and 57 ton C ha-1 in DEF, AC and CF soils, respectively. The total carbon storages (standing biomass plus soil carbon, excluding belowground biomass) were 418, 164 and 60 ton C ha-1 in DEF, AC and CF soils, respectively. At forest site, majority of carbon was stored in the standing biomass (71% and 60% of total carbon storage at DEF and AC site, respectively). At CF site, however, about 95% of carbon was stored in the soil. Total net CO2 emission was not significantly different among these three sites (12-17 ton C ha-1 yr-1), presumably due to large spatial and temporal variations. The results indicated that the amount and characteristics of carbon storage differed significantly depending on land use type. Conversion of natural forest to agriculture (after 16 years), in addition to loss of carbon stored in the standing biomass, might result in about 50% loss of soil carbon in the upper 50 cm. On the other hand, reforestation for 16 years might increased soil carbon by 14% (0.6 ton C yr-1) compared with a continuous cultivated soil (maize). |
ผลงานตีพิมพ์ในวารสารวิชาการSoil Organic Carbon Loss and Turnover Resulting from Forest Conversion to Maize Fields in Eastern Thailandผู้แต่ง:Jaiarree, S., Chidthaisong, A., Dr.Nipon Tangtham, Professor, Polprasert, C., Dr.Ed Sarobol, Professor , Tyler, S.C., วารสาร: |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Temperature and Moisture Controls of Soil Respiration in a Dry Dipterocarp Forest, Ratchaburi Province) ผู้เขียน:Phongthep Hanpattanakit, สำเริง ปานอุทัย, Amnat Chidthaisong สื่อสิ่งพิมพ์:pdf AbstractTo quantify soil respiration and to investigate its diurnal and seasonal variations, soil respiration was studied in a dry dipterocarp forest located in Chombung District, Ratchaburi Province (13? 35’ 13.3” N, 99? 30’ 3.9” E). Soil respiration was measured hourly during February to July 2008 using a closed-automatic chamber method. The results showed that soil respiration varied significantly both spatially and seasonally. Among three replicates of measurements and within each hour of measurement, the coefficient of variations could be as high as 80%. On a daily scale, a weak relationship between soil respiration and soil temperature was observed. On a seasonal scale, a negative relationship between soil respiration and temperature was observed. However, a strong positive relationship between soil respiration and soil moisture over the moisture range of 17-19%vol was found. Soil respiration decreased beyond this moisture level. The total CO2 emissions during the six-month period in dry dipterocarp forest were 1.81 kgCO2/m2, or 4.9 tonne C/ha. |
หัวเรื่อง:ไม่มีชื่อไทย (ชื่ออังกฤษ : Effects of Moisture and Temperature on Respiration in Tropical Forest and Agricultural Soils) ผู้เขียน:Siriporn Wiriyatangsakul, Amnat Chidthaisong, Sudarut Tripetchkul, Pitayakorn Limtong สื่อสิ่งพิมพ์:pdf AbstractSoil respiration in tropical uplands was studied in agriculture (maize) and dry evergreen forest soils. The objective of this study was to investigate the effects of moisture and temperature on soil respiration. Diurnal variations of in situ soil CO2 efflux was studied in May 2004 and February 2005. In the laboratory, soil respiration in a short-term incubation was measured under various moisture contents (air-dry, 25, 50, 75 and 100%WHC) and various constant temperatures (10?C to 45?C). In situ soil CO2 flux showed strong diurnal patterns correlated with both air and soil temperature. CO2 efflux from both study sites increased to the maximum values during the late afternoon, usually 2-4 hours after a peak in air temperature. The total soil CO2 fluxes integrated over the measurement period were 1354 and 3082 mg CO2 m-2 day-1 at agricultural site and 1467 and 12851 mg CO2 m-2 day-1 at forest site in May 2004 and February 2005, respectively. The Q10 value for agricultural site estimated from relationship between soil temperature at 5 cm and CO2 flux was 3.37 (May 2004). For the forest site, the Q10 was 2.04 (February 2005). Results from laboratory study indicated that the topsoil layer (the top 20 cm) contributed mainly to the overall respiration. Soil respiration was highest at moisture between 50% and 75% WHC. The Q10 values of agricultural soil were higher than of that of the forest soil, indicating relatively higher sensitivity of the agricultural soil to temperature change than the forest soil. Laboratory results also indicated that subsoil was more sensitive to temperature and moisture changes than topsoil. |
ผลงานตีพิมพ์ในวารสารวิชาการEffects of elevated ozone concentrations on Thai Jasmine rice cultivars (Oryza sativa L.)ผู้แต่ง:Ariyaphanphitak, W, Chidthaisong, A, Dr.Ed Sarobol, Professor, Bashkin, VN, Towprayoon, S, วารสาร: |
ผลงานตีพิมพ์ในวารสารวิชาการCARBON BUDGET AND SEQUESTRATION POTENTIAL IN A SANDY SOIL TREATED WITH COMPOSTผู้แต่ง:Jaiarree, S, Chidthaisong, A, Dr.Nipon Tangtham, Professor, Polprasert, C, Dr.Ed Sarobol, Professor, Tyler, SC, วารสาร: |
|
|
 |
|
|
 |
Researcherดร. เจษฎา ภัทรเลอพงศ์, อาจารย์ที่ทำงาน:ภาควิชาเกษตรและทรัพยากร คณะทรัพยากรธรรมชาติและอุตสาหกรรมเกษตร สาขาที่สนใจ:สรีรวิทยาการผลิตพืช, แสงและจุลภูมิอากาศ, สถาปัตยลักษณ์พืช, การผลิตไม้ผล, สถิติและการวางแผนการทดลอง, การเขียนโปรแกรมด้วยภาษา C++ และ Visual Basic Resume |
 |