Greenhouse gases emission from paddy fields under different rice straw treatments

A field experiment was conducted in double rice area to figure out the influence of different rice straw treatments(rice straw removing +NPK,rice straw incorporated into the soil(RS)+NPK,rice straw burned in situ(BIS)+NPK) on the greenhouse gases emission from paddy fields.The results showed that RS+NPK treatment increased the CH4 emission and decreased the N2O emission significantly compared with NPK treatment,while BIS+NPK treatment reduced CH4 and N2O emission during the double rice growing season.N2O emission of RS+NPK and BIS+NPK treatments had no significant difference.CH4 emission from burning activity was equivalent to that from rice field,while N2O emission accounted for a great proportion of total N2O emission during the growing period,90.1% and 53.4%,respectively.The total GHG emission of different treatment is RS+NPKNPKBIS+NPK.A similar order was found for emission intensity(CO2 e/t grain yield).