Processes involved in formation and emission of methane in rice paddies

摘要: The seasonal change of the rates production and emission methane were determined under in-situ conditions in an Italian rice paddy 1985 1986. contribution to total CH4 plant-mediated transport, ebullition, diffusion through flooding water was quantified by cutting plants trapping emerging gas bubbles with funnels. Both increased during season reached a maximum August. However, numbers methanogenic bacteria did not change. As grew increased, percentage produced which reoxidized thus, emitted, also increased. At its maximum, about 300 ml per m2 hour. only 6% emitted this 96% via transport. Radiotracer experiments showed that CH, from H2/CO2. (30–50%) acetate. pool concentration acetate range 6–10 mM. turnover time 12–16 h. Part appeared be available for or CO2