ที่มา:วิทยาสารเกษตรศาสตร์ สาขา วิทยาศาสตร์

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

Abstract

Carbon 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).

Article Info

Agriculture and Natural Resources -- formerly Kasetsart Journal (Natural Science), Volume 040, Issue 2, Apr 06 - Jun 06, Page 382 - 394 |  PDF |  Page