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Soil and plant growth response and trace elements accumulation in sweet corn and snow pea grown under fresh and carbonated coal fly ash amendment
Agronomy Journal ( IF 2.1 ) Pub Date : 2021-05-05 , DOI: 10.1002/agj2.20711
Nadeesha L. Ukwattage 1, 2 , U.Vajini Lakmalie 3 , Ranjith P. Gamage 1
Affiliation  

With the recent focus of using coal combustion residue fly ash in mineral carbonation for C capture, an end product, carbonated coal fly ash is generated. The physicochemical changes occur in fly ash during carbonation is hypothesized to improve its soil application potential compared to original fly ash. Therefore, in the present study, we tested carbonated coal fly ash against non-carbonated (fresh) ash for its effect on soil, plant production, and elemental accumulation in plant parts. Plant pots of sweet corn (Zea mays L.) and snow pea (Pisum sativum L.) added with fresh or carbonated Australian coal fly ash to sandy loam Podosol soil at 5% (w/w) and 10% (w/w) mixing rates were used in the study. Alkalinity of fly ashes attenuated the strong acidity of the soil into weakly acidic to slightly alkaline ranges. Either fresh or carbonated fly ashes added trace elements such as B, Fe, Mn, Zn, Cu, Cd, Mo, Cr, Pb, and Ni into the soil which significantly enhanced the plant growth and yield compared to fly ash absent pots. Accumulation of heavy metals in plant parts were observed in fly ash-treated pots. Fresh fly ash at 10% (w/w) application rate increased the soil salinity above admissible range and retarded the crop growth and yield. Carbonated fly ash continued to enhance the crop production of sweet corn and snow pea up to 10% (w/w) mixing rate. Carbonation has improved the fly ash from its original state to make it a safer soil amendment at higher dosages such as 10% (w/w).

中文翻译:

新鲜和碳化煤粉煤灰改良剂下甜玉米和豌豆的土壤和植物生长响应及微量元素积累

随着最近在矿物碳酸化中使用煤燃烧残渣飞灰来捕获 C 的重点,产生了最终产品,碳酸化煤飞灰。与原始粉煤灰相比,碳化过程中粉煤灰中发生的物理化学变化被假设为提高其土壤应用潜力。因此,在本研究中,我们测试了碳化粉煤灰与非碳化(新鲜)灰分对土壤、植物生产和植物部分元素积累的影响。种植甜玉米 ( Zea mays L.) 和荷兰豆 ( Pisum sativum ) 的盆栽L.) 在研究中使用了以 5% (w/w) 和 10% (w/w) 混合率添加新鲜或碳酸化澳大利亚粉煤灰到砂质壤土 Podosol 土壤中。飞灰的碱度将土壤的强酸性减弱为弱酸性至微碱性范围。新鲜或碳酸化的粉煤灰向土壤中添加了微量元素,如 B、Fe、Mn、Zn、Cu、Cd、Mo、Cr、Pb 和 Ni,与没有粉煤灰的盆相比,这显着提高了植物的生长和产量。在粉煤灰处理过的花盆中观察到重金属在植物部位的积累。10% (w/w) 施用率的新鲜粉煤灰使土壤盐分增加到允许范围以上,并阻碍了作物的生长和产量。碳酸粉煤灰继续提高甜玉米和豌豆的作物产量,混合率高达 10% (w/w)。
更新日期:2021-05-05
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