Effect of Rice Straw on Methane Production and Emission from Paddy Fields

Abstract

Effect of rice straw management on Ch4 formation in Bang Khen and Rangsit paddy soils were determined by incubating 0,0.5 smf 1.0% w/w rice straw added soil and prior aerobic incubated 0.5% w/w rice straw added soil under strict anaerobic condition. Methane emission rate from Bang Khen, Rangsit and Roi Et paddy soils with and without rice straw addition in combination with and without growing rice were also evaluated in the pot experiment.
Research results showed that rice straw management was the important factor for CH4 formation in submerged soil. Rice straw added soil without incubation promoted vigorous Ch4 formation while rice straw application as well. Increasing rate was remarkable at intial period and decreased with time. However, CH4 emission rate in the later stage of planted pot was higher than that of unplanted pot.