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

• 作者: Laila Khatun Muhammad Aslam Ali Mahmud Hossain Sumon Md. Bazlul Islam Fahima Khatun
• 来源期刊: 农业化学和环境(英文)
• 学科: 农学
• 关键词: CH4 RICE Saline Soils PHOSPHOGYPSUM BIOCHAR Trichocompost
• 年，卷（期）: 2021,（1）
• 页码范围: 16-36
• 页数: 21页
• 分类号: S51

摘要

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_{<span style="vertical-align:sub;">4</span>}<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>_{<span style="vertical-align:sub;">4</span>}<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>_{<span style="vertical-align:sub;">4</span>}<span> emissions. From panicle initiation to grain ripening stages treatment T</span>_{<span style="vertical-align:sub;">4</span>}<span> (100% NPKSZn</span><span> </span><span>+ 75 mM NaCl stress)</span><span> </span><span>showed the highest CH</span>_{<span style="vertical-align:sub;">4</span>}<span> emission rate, while lower CH</span>_{<span style="vertical-align:sub;">4</span>}<span> emission rate</span><span> </span><span>was recorded in T</span>_{<span style="vertical-align:sub;">5</span>}<span> (100% NPKSZn + 25 mM NaCl stress + Phospho-gypsum) and T</span>_{<span style="vertical-align:sub;">8</span>}<span> treatment (100% NPKSZn + 50 mM NaCl + Phospho-gypsum). In case of seasonal total CH</span><sub><span style="vertica