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Manure-derived hydrochar superior to manure: Reducing non-point pollution risk by altering nitrogen and phosphorus fugacity in the soil-water system

文献类型： 外文期刊

作者： Feng, Yuanyuan 1 ; Wang, Ning 1 ; Fu, Haibin 3 ; Xie, Huifang 3 ; Xue, Lihong 1 ; Feng, Yanfang 1 ; Poinern, Gerrard Eddy Jai 4 ; Chen, Deli 5 ;

作者机构： 1.Jiangsu Acad Agr Sci, Natl Agr Expt Stn Agr Environm, Key Lab Agroenvironm Downstream Yangtze Plain, Key Lab Combined Farming & Raising,Minist Agr & Ru, Nanjing 210014, Peoples R China

2.Jiangsu Acad Agr Sci, Inst Agr Resources & Environm, Nanjing 210014, Peoples R China

3.Nanjing Univ Sci & Technol, Sch Environm & Biol Engn, Jiangsu Key Lab Chem Pollut Control & Resources Re, Nanjing 210094, Peoples R China

4.Murdoch Univ, Coll Sci Hlth Engn & Educ, Murdoch Appl Innovat Nanotechnol Res Grp, Murdoch, WA 6150, Australia

5.Univ Melbourne, Fac Vet & Agr Sci, Sch Agr & Food, Melbourne, Vic 3010, Australia

关键词： Manure-derived hydrochar; Soil-water systems; Nitrogen; Phosphorus; Enzyme activity

期刊名称：WASTE MANAGEMENT （ 影响因子：8.1； 五年影响因子：8.7 ）

ISSN： 0956-053X

年卷期： 2023 年 168 卷

页码：

收录情况： SCI

摘要： Hydrothermal carbonization (HTC) technology is an emerging technology for the disposal of manure-based wet wastes. However, the effects of manure-derived hydrochar inputs to agricultural soils on nitrogen (N) and phosphorus (P) morphology and conversion in soil-water systems remain largely unexplored. In this study, pig and cattle manure (PM and CM), and their derived hydrochar (PCs and CCs) were applied to agricultural soils, with changes in nutrient morphology and enzyme activities related to N and P transformation in the soil-water systems observed through flooded incubation experiments. The results showed that floodwater ammonia N concentrations were reduced by 12.9-29.6% for PCs relative to PM, and 21.6-36.9% for CCs relative to CM, respectively. Moreover, floodwater total P concentrations of PCs and CCs were reduced by 11.7-20.7% relative to PM and CM. Soil enzyme activities closely related to N and P transformations in the soil-water system responded differently to manure and manure-derived hydrochar application. Compared to manure, the application of manure-derived hydrochar inhibited soil urease and acid phosphatase activity by up to 59.4% and 20.3%, respectively, whereas it had significant promotion effects on soil nitrate reductase (-69.7%) and soil nitrite reductase (-64.0%). The products of manure after HTC treatments have the characteristics of organic fertilizers, and the fertilization effects of PCs are more prominent than CCs, which are subject to further verification in field trials. Our findings improve the current understanding of manure-derived organic matter affecting N and P conversions in soil-water systems and the risk for non-point source pollution.

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