%0 Journal Article
%T Mitigation Rice Yield Scaled Methane Emission and Soil Salinity Stress with Feasible Soil Amendments
%A Laila Khatun
%A Muhammad Aslam Ali
%A Mahmud Hossain Sumon
%A Md. Bazlul Islam
%A Fahima Khatun
%J Journal of Agricultural Chemistry and Environment
%P 16-36
%@ 2325-744X
%D 2021
%I Scientific Research Publishing
%R 10.4236/jacen.2021.101002
%X Sea level rise and saline water intrusion have been affecting land use and crop production especially rice in the coastal areas of major rice growing countries including Bangladesh. The upward trend in salinity intrusion has been hampering crop production, particularly rice cultivation in the coastal areas of Bangladesh. Therefore, an experiment was conducted on rice planted saline soils under the Nethouse at Bangladesh Agricultural University, Mymensingh to improve the properties of salt affected soils for rice cultivation as well as controlling methane (CH<sub><span style=\"vertical-align:sub;\">4</span></sub><span>) emissions with feasible soil organic amendments and recommended inorganic fertilizers. The experimental treatments were arranged under 25 mM NaCl, 50 mM NaCl and 75 mM NaCl salinity levels with different combinations of NPKSZn, biochar, phosphogypsum and Trichocompost. It was found that CH</span><sub><span style=\"vertical-align:sub;\">4</span></sub><span> emission rates were suppressed with phospho-gypsum and biochar amendments within the salinity level 25 mM to 50 mM, beyond this salinity level (at 75 mM)</span><span>,</span><span> soil amendments were not effective to control CH</span><sub><span style=\"vertical-align:sub;\">4</span></sub><span> emissions. From panicle initiation to grain ripening stages treatment T</span><sub><span style=\"vertical-align:sub;\">4</span></sub><span> (100% NPKSZn</span><span> </span><span>+ 75 mM NaCl stress)</span><span> </span><span>showed the highest CH</span><sub><span style=\"vertical-align:sub;\">4</span></sub><span> emission rate, while lower CH</span><sub><span style=\"vertical-align:sub;\">4</span></sub><span> emission rate</span><span> </span><span>was recorded in T</span><sub><span style=\"vertical-align:sub;\">5</span></sub><span> (100% NPKSZn + 25 mM NaCl stress + Phospho-gypsum) and T</span><sub><span style=\"vertical-align:sub;\">8</span></sub><span> treatment (100% NPKSZn + 50 mM NaCl + Phospho-gypsum). In case of seasonal total CH</span><sub><span style=\"vertical-align:sub;\">4</span></sub><span> emission, Phospho-gypsum was found most effective to mitigate total CH</span><sub><span style=\"vertical-align:sub;\">4</span></sub><span> emissions followed by biochar and trichocompost amendments in all salinity </span><span>levels, probably due to the improved soil redox potential status (Eh), decreased</span><span> </span><span>electrical conductivity (EC), increased SO<sub>4</sub><sup style=\"margin-left:-7px;\">2-</sup>, NO<sub>3</sub><sup style=\"margin-left:-7px;\">-</sup> ,
%K CH4
%K Rice
%K Saline Soils
%K Phosphogypsum
%K Biochar
%K Trichocompost
%U http://www.scirp.org/journal/PaperInformation.aspx?PaperID=105825