Fluxes and production pathways of nitrous oxide in different types of tropical forest soils in Thailand
บทความในวารสาร
ผู้เขียน/บรรณาธิการ
กลุ่มสาขาการวิจัยเชิงกลยุทธ์
ไม่พบข้อมูลที่เกี่ยวข้อง
รายละเอียดสำหรับงานพิมพ์
รายชื่อผู้แต่ง: Vanitchung S., Conrad R., Harvey N.W., Chidthaisong A.
ปีที่เผยแพร่ (ค.ศ.): 2011
Volume number: 57
Issue number: 5
หน้าแรก: 650
หน้าสุดท้าย: 658
จำนวนหน้า: 9
นอก: 0038-0768
eISSN: 0038-0768
ภาษา: English-Great Britain (EN-GB)
ดูในเว็บของวิทยาศาสตร์ | ดูบนเว็บไซต์ของสำนักพิมพ์ | บทความในเว็บของวิทยาศาสตร์
บทคัดย่อ
Nitrous oxide (N 2O) emissions from the soil surface of five different forest types in Thailand were measured using the closed chamber method. Soil samples were also taken to study the N 2O production pathways. The monthly average emissions (±SD, n=12) of N 2O from dry evergreen forest (DEF), hill evergreen forest (HEF), moist evergreen forest (MEF), mixed deciduous forest (MDF) and acacia reforestation (ARF) were 13.0±8.2, 5.7±7.1, 1.2±12.1, 7.3±8.5 and 16.7±9.2 μg N m -2 h -1respectively. Large seasonal variations in fluxes were observed. Emission was relatively higher during the wet season than during the dry season, indicating that soil moisture and denitrification were probably the main controlling factors. Net N 2O uptake was also observed occasionally. Laboratory studies were conducted to further investigate the influence of moisture and the N 2O production pathways. Production rates at 30% water holding capacity (WHC) were 3.9±0.2, 0.5±0.06 and 0.87±0.01 ng N 2O-nitrogen (N) g-dw -1day -1 in DEF, HEF and MEF respectively. At 60% WHC, N 2O production rates in DEF, HEF and MEF soils increased by factors of 68, 9 and 502, respectively. Denitrification was found to be the main N 2O production pathway in these soils except in MEF. © 2011 Japanese Society of Soil Science and Plant Nutrition.
คำสำคัญ
N 2O emission, N 2O production pathway, Tropical forest soil