The effect of controlled soil temperature on diel CH4 emission variation

Abstract

During the 1994 dry season, diel methane emission variations were monitored in the greenhouse and the phytotron of the International Rice Research Institute, Los Banos, Philippines at ambient and artificial soil temperature regimes using a closed chamber technique. Diel soil temperature regimes affected methane emission rates. Under ambient temperature regime, methane fluxes increased with rising soil temperature in the morning and reached a maximum in the early afternoon, then decreased rapidly and leveled off at night while soil temperature declined gradually till sunrise next morning. Changing diel soil temperature regimes resulted in changes in diel methane emission patterns irrespective of the amplitudes of the methane emission rates. Using Arrhenius equation to simulate temperature dependence of methane emission variations indicated that soil temperature is a major factor controlling diel methane emission variations (r2= 0.78).

Source or Periodical Title

Chemosphere

ISSN

456535

Page

2083-2092

Document Type

Article

Subject

Controlling factor, Diel variation, Methane emission, Soil temperature

This document is currently not available here.

Share

COinS