Dept. of Environmental Science, Bangladesh Agricultural University, Mymensingh 2202, Bangladesh; Dept. of Agricultural Chemistry, Gyeongsang National University, Jinju, Republic of Korea; Division of Environmental Horticulture, Chiba University, Matsudo, Chiba 271-8510, Japan.
Dept. of Agricultural Chemistry, Gyeongsang National University, Jinju, Republic of Korea.
Sci Total Environ. 2015 Oct 1;529:140-8. doi: 10.1016/j.scitotenv.2015.04.090. Epub 2015 May 23.
Effects of different soil amendments were investigated on methane (CH4) and nitrous oxide (N2O) emissions, global warming potential (GWP) and yield scaled GWPs in paddy soils of Republic of Korea, Japan and Bangladesh. The experimental treatments were NPK only, NPK+fly ash, NPK+silicate slag, NPK+phosphogypsum(PG), NPK+blast furnace slag (BFS), NPK+revolving furnace slag (RFS), NPK+silicate slag (50%)+RFS (50%), NPK+biochar, NPK+biochar+Azolla-cyanobacteria, NPK+silicate slag+Azolla-cyanobacteria, NPK+phosphogypsum (PG)+Azolla-cyanobacteria. The maximum decrease in cumulative seasonal CH4 emissions was recorded 29.7% and 32.6% with Azolla-cyanobacteria plus phospho-gypsum amendments in paddy soils of Japan and Bangladesh respectively, followed by 22.4% and 26.8% reduction with silicate slag plus Azolla-cyanobacteria application. Biochar amendments in paddy soils of Japan and Bangladesh decreased seasonal cumulative N2O emissions by 31.8% and 20.0% respectively, followed by 26.3% and 25.0% reduction with biochar plus Azolla-cyanobacteria amendments. Although seasonal cumulative CH4 emissions were significantly increased by 9.5-14.0% with biochar amendments, however, global warming potentials were decreased by 8.0-12.0% with cyanobacterial inoculation plus biochar amendments. The maximum decrease in GWP was calculated 22.0-30.0% with Azolla-cyanobacteria plus silicate slag amendments. The evolution of greenhouse gases per unit grain yield (yield scaled GWP) was highest in the NPK treatment, which was decreased by 43-50% from the silicate slag and phosphogypsum amendments along with Azolla-cyanobacteria inoculated rice planted soils. Conclusively, it is recommended to incorporate Azolla-cyanobacteria with inorganic and organic amendments for reducing GWP and yield scaled GWP from the rice planted paddy soils of temperate and subtropical countries.
研究了不同土壤改良剂对韩国、日本和孟加拉国稻田甲烷（CH4）和氧化亚氮（N2O）排放、全球升温潜势（GWP）和产量标准化 GWP 的影响。实验处理为仅 NPK、NPK+粉煤灰、NPK+硅渣、NPK+磷石膏（PG）、NPK+高炉渣（BFS）、NPK+转炉渣（RFS）、NPK+硅渣（50%）+RFS（50%）、NPK+生物炭、NPK+生物炭+满江红-蓝藻、NPK+硅渣+满江红-蓝藻、NPK+PG+满江红-蓝藻。在日本和孟加拉国的稻田中，添加满江红-磷石膏的处理使累积季节 CH4 排放量最大减少了 29.7%和 32.6%，其次是添加硅渣+满江红-蓝藻的处理，减少了 22.4%和 26.8%。在日本和孟加拉国的稻田中，生物炭的添加使季节累积 N2O 排放量分别减少了 31.8%和 20.0%，其次是添加生物炭+满江红-蓝藻的处理，减少了 26.3%和 25.0%。尽管生物炭的添加使季节累积 CH4 排放量显著增加了 9.5-14.0%，但添加蓝藻+生物炭的处理使全球升温潜势降低了 8.0-12.0%。最大的 GWP 减少量为 22.0-30.0%，添加满江红-硅渣。在仅 NPK 处理中，每单位谷物产量的温室气体排放（产量标准化 GWP）最高，与添加硅渣和磷石膏以及接种满江红-蓝藻的水稻种植土壤相比，该处理降低了 43-50%。综上所述，建议在温带和亚热带国家的水稻种植稻田中，将满江红-蓝藻与无机和有机改良剂结合使用，以降低 GWP 和产量标准化 GWP。
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