Temperature and Moisture Controls of Soil Respiration in a Dry Dipterocarp Forest, Ratchaburi Province

Authors

  • Phongthep Hanpattanakit The Joint Graduate School of Energy and Environment, King Mongkut’s University of Technology Thonburi, Bangkok 10140, Thailand.
  • Samreong Panuthai National Park, Wildlife and Plant Conservation, Bangkok 10900, Thailand.
  • Amnat Chidthaisong The Joint Graduate School of Energy and Environment, King Mongkut’s University of Technology Thonburi, Bangkok 10140, Thailand.

Keywords:

soil respiration, spatial and seasonal variations, dry dipterocarp forest, closed-automatic chamber

Abstract

To 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.

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Published

2009-12-30

How to Cite

Phongthep Hanpattanakit, Samreong Panuthai, and Amnat Chidthaisong. 2009. “Temperature and Moisture Controls of Soil Respiration in a Dry Dipterocarp Forest, Ratchaburi Province”. Agriculture and Natural Resources 43 (4). Bangkok, Thailand:650-61. https://li01.tci-thaijo.org/index.php/anres/article/view/244738.

Issue

Vol. 43 No. 4 (2009): October-December

Section

Research Article

License

online 2452-316X print 2468-1458/Copyright © 2022. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/),
production and hosting by Kasetsart University of Research and Development Institute on behalf of Kasetsart University.