Co-application of biogas slurry and hydrothermal carbonization aqueous phase substitutes urea as the nitrogen fertilizer and mitigates ammonia volatilization from paddy soil
文献类型： 外文期刊
作者： Li, Detian 1 ; Cheng, Yueqin 3 ; Li, Tianling 5 ; Sun, Haijun 4 ; Xue, Lihong 1 ; Cui, Hongbiao 6 ; Feng, Yanfang 1 ; Yan 1 ;
作者机构： 1.Jiangsu Acad Agr Sci, Minist Agr & Rural Affairs Peoples Republ China, Key Lab Agroenvironm Downstream Yangtze Plain, Minist Agr & Rural Affairs,Inst Agr Resources & E, Nanjing 210014, Peoples R China
2.Jiangsu Acad Agr Sci, Minist Agr & Rural Affairs Peoples Republ China, Key Lab Crop & Anim Integrated Farming, Minist Agr & Rural Affairs,Inst Agr Resources & E, Nanjing 210014, Peoples R China
3.Nanjing Stn Qual Protect Cultivated Land, Nanjing 210036, Peoples R China
4.Nanjing Forestry Univ, Coll Forestry, Coinnovat Ctr Sustainable Forestry Southern China, Nanjing 210037, Peoples R China
5.Nanjing Univ Informat Sci & Technol, Collaborat Innovat Ctr Atmospher Environm & Equip, Sch Environm Sci & Engn, Jiangsu Key Lab Atmospher Environm Monitoring & P, Nanjing 210044, Jiangsu, Peoples R China
6.Anhui Univ Sci & Technol, Sch Earth & Environm, Huainan 232001, Peoples R China
7.Univ Tokyo, Grad Sch Agr & Life Sci, Bunkyo Ku, Tokyo 1138657, Japan
8.Jiangsu Univ, Sch Environm & Safety Engn, Zhenjiang 212001, Jiangsu, Peoples R China
关键词： Anaerobic fermentation; Hydrothermal carbonization; Paddy soil; Liquid fertilizer
期刊名称：ENVIRONMENTAL POLLUTION （ 影响因子：8.071； 五年影响因子：8.35 ）
ISSN： 0269-7491
年卷期： 2021 年 287 卷
页码：
收录情况： SCI
摘要： Biogas slurry (BS) and bio-waste hydrothermal carbonization aqueous phase (HP) are nutrient-rich wastewater. To prevent environment contamination, transforming BS and HP into synthetic fertilizers in the agricultural field can potentially realize resource utilization. We hypothesized that acidic HP could neutralize alkaline BS, adjusting floodwater pH from 6.88 to 8.00 and mitigating ammonia (NH3) volatilization from the paddy soil. In this soil column study, the mixture of BS and HP was applied to paddy soil to substitute 50%, 75%, and 100% to urea. With a low (L) or high (H) ratio of HP, treatments were labeled as BCL50, BCL75, BCL100, BCH50, BCH75, and BCH100. Results showed that microbial byproduct-and fulvic acid-like substance were the main components in BS and HP using 3D-EEM analysis, respectively. Co-application of BS and HP mitigated the NH3 volatilization by 4.2%-65.5% compared with CKU. BCL100 and BCH100 treatments significantly (P < 0.05) mitigated NH3 volatilization by 65.5% and 56.8%, which also significantly (P < 0.05) mitigated the yield-scale NH3 volatilization by 49.6% and 42.3%, compared with CKU. The low NH4+-N concentration and pH value in floodwater were the main reason explained the NH3 mitigation. Therefore, this study demonstrated that BS and HP co application can substitute the urea as a valuable N fertilizer in a rational rate and meanwhile mitigate the NH3 volatilization. This study will provide new ideas for the utilization of BS and HP resources in the context of ammonia mitigation.
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