Greenhouse gas emissions reduction and rice yield potential under bio-fertilizer application

Abstract

Rice cultivation is one of the largest contributors of CH4 emission to the atmosphere. It contributes approximately 5 to 19% of the total global CH4 emissions. The aim of this research was to investigate the effect of using of bio-fertilizers on greenhouse gas (GHG) emissions and rice yield. The experiment was conducted from September 2016 to January 2017 in experimental station of Indonesian Agricultural Environmental Research Institute, Pati Central Java. This experiment used completely randomized design with three treatments and five replications. The treatments were (1) no amendments (control), (2) rice straw 3 t ha-1 and (3) rice straw 3 t ha-1 + bio-fertilizer 10 L ha-1. The CH4, CO2, and N2O gas fluxes were measured weekly during the rice-growing season by using closed chamber method. The results of this study showed that application of straw + bio-fertilizers treatment reduced GHG emissions of CH4, N2O, and CO2 by 9.2, 14.78, and 27.68%, respectively compared to the application of straw treatment. The application of straw + bio-fertilizers treatment decreased global warming potential (GWP) by 10.75% compared to the application of straw. The GHG index (GHGI) of straw + bio-fertilizer treatment decreased 8.27% compare to control. The results suggested that application of bio-fertilizer could support environmentally agriculture in supporting food self-sufficiency.