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Mitigation Rice Yield Scaled Methane Emission and Soil Salinity Stress with Feasible Soil Amendments

Journal of Agricultural Chemistry and Environment 2021年第1期10卷 16-36页

作者： Laila Khatun Muhammad Aslam Ali Mahmud Hossain Sumon Md. Bazlul Islam Fahima Khatun Department of Environmental Science Bangladesh Agricultural University Mymensingh Bangladesh Department of Soil Science Bangladesh Agricultural University Mymensingh Bangladesh Department of Seed Science and Technology Bangladesh Agricultural University Mymensingh Bangladesh Department of Pathobiology Bangabandhu Sheikh Mujibur Rahman Agricultural University Gazipur Bangladesh

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 (CH4) 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 CH4 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), soil amendments were not effective to control CH4 emissions. From panicle initiation to grain ripening stages treatment T4 (100% NPKSZn + 75 mM NaCl stress) showed the highest CH4 emission rate, while lower CH4 emission rate was recorded in T5 (100% NPKSZn + 25 mM NaCl stress + Phospho-gypsum) and T8 treatment (100% NPKSZn + 50 mM NaCl + Phospho-gypsum). In case of s

关键词： CH4 Rice Saline Soils Phosphogypsum Biochar trichocompost

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