Concerns with environmental issues are nowadays increasing considerably inevery agricultural sector. Rice (Oryza sativa L.) production cause many environmentalproblems for instance the use of fertilizers increases pollution of the ecosystem;greenhouse gases are generated, especially methane gas, when flooding of rice fields cutsoff oxygen supply, then anaerobic microorganisms ferment the organic matter in the soil,causing the production of methane carbon dioxide etc. Despite its environmental effectsand the changes of the world ecology the production of rice must continue because it isthe worlds most important staple food crop with more than half of the worldspopulation relying on it as the major daily source of calories and protein. To preferablyavoid, or at least reduce the environmental impacts, no-tillage is becoming a morepopular agricultural practice. It reduces erosion, conserves and improves water quality,and stores more carbon in the soil than plowed land. Hence it improves soil quality andhelps reduce carbon inputs to the atmosphere that are thought to be the cause of globalwarming. No-tillage therefore provides an opportunity to rapidly expand productionwhile protecting paddy soil against erosion, GHG emission, increasing soil microbialbiomass (MB) and soil enzyme activities. The objectives of this study were to determinethe environmental impacts on the ecosystem; no-tillage system might have particularly byassessing GHG and GWP order to suggest the conservation options in the rice producingareas. The study was carried out by analyzing the results of soil methane, CO2 and N2O,water and microbial biomass (MB) and soil enzymes under No-tillage with no fertilizer(NT0), Conventional tillage with no fertilizer (CT0), No-tillage with compound fertilizer(NTC) and Conventional tillage with compound fertilizer (CTC) systems from rice cultivation.