Effectiveness of plant growth regulators on emission reduction of greenhouse gas (Nitrous oxide): An approach for cleaner environment

Analysis of Greenhouse Gas (Methane and Nitrous Oxide) emission and global warming potential from rice fields: with reference to biological mitigation of climate change.

“…There are several reports on the variations in CH 4 and N 2 O emission from rice paddies during the growing period [10,18,19,31] which are in good agreement with the findings of present investigation. Our results of high peaks for CH 4 and N 2 O at tillering and panicle initiation stage are well corroborated with some recent findings [10,18,36,37,31].…”

“…The highest GWP is recorded from the field planted with variety Swabhagi and Disang, whereas variety Abhishek and Lachit recorded the lowest GWP. In the present study, GWP have a strong correlation with CEE which is in concordance with the findings of Bhatia et al, 2010 [24], Baruah et al, 2016a [34] and Bordoloi et al, 2018 [18]. Varietal difference in yield scale GWP i.e GHGI, is mainly contributed by the emission differences of the varieties [31,39] which might be the reason for highest GHGI recorded by the variety Kopilee and lowest by Lachit and Abhishek.…”

“…Various factors such as supply of organic matter, size of the root space, availability of fertilizers, oxidation rate in the rhizosphere are reported to affect the GHG emission rates during tillering and panicle initiation stage [10,[33][34][35]. There are several reports on the variations in CH 4 and N 2 O emission from rice paddies during the growing period [10,18,19,31] which are in good agreement with the findings of present investigation. Our results of high peaks for CH 4 and N 2 O at tillering and panicle initiation stage are well corroborated with some recent findings [10,18,36,37,31].…”

“…hour to 11:00 hour [18]. The samples were brought to the laboratory immediately after sampling and analyzed for CH 4 and N 2 O concentrations using gas chromatograph (GC) (Varian 3800, USA).…”

“…Methane flux was calculated from the temporal increase in the concentration of CH 4 inside the box by the equation of Parashar et al, 1996 [20]. N 2 O fluxes were calculated from the linear increase in N 2 O inside the chamber during the gas sampling period [18] with an electron capture detector (ECD) and a stainless steel chromopack capillary column (50cm long, 0.53mm outside diameter, 1μm inside diameter).The temperature of the column, injector and detector were 80, 200, and 300 ˚C, respectively. The carrier gas was pure N 2 (99.999%) with a flow rate of 15 ml min -1 .…”