1 research outputs found
Suppression of CH4 Emission by Rice Straw Removal and Application of BioâEthanol Production Residue in a Paddy Field in Akita, Japan
To elucidate the effects of rice straw removal and rice strawâbased bioâethanol production residue application on rice growth and methane (CH4) emission from a paddy field, a lysimeter experiment with three treatments (application of rice straw after harvesting (the riceâstraw plot); removal of rice straw and the application of bioâethanol production residue (the Etâresidue plot); removal of rice straw (the noâapplication plot)) was conducted over three years. Though the grain yields in the Etâresidue and noâapplication plots tended to be slightly higher than that in the ricestraw plot, there were no significant differences among the plots (530â546 gâmâ2). Suppression of CH4 emission by the treatments was found clearly in the early part of the growing season. The total CH4 emissions during the riceâgrowing season (unit: gâCâmâ2âperiodâ1) followed the order of the noapplication plot (11.9) < the Etâresidue plot (14.6) < the riceâstraw plot (25.4), and a significant difference was found between the noâapplication and riceâstraw plots. Consequently, bioâethanol production from rice straw and a following application of its residue to paddy fields is considered to be a promising technology which can obtain new sustainable energy and suppress CH4 emission without any inhibition on rice growth