Study on the nitrogen-releasing characteristics and mechanism of biochar-based urea infiltration fertilizer

Wang, Mingfeng; Xiang, Aihua; Gao, Zhennan; Zhang, Ke; Ren, Yuping; Hu, Zhifeng

doi:10.1007/s13399-021-01848-5

Cited by 7 publications

(5 citation statements)

References 25 publications

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“…The experiment was laid in a completely randomized design (CRD) having three replications in two different textured alkaline calcareous soils (coarse and fine texture). After 1,3,5,10,20,30,40,50,60, and 70 days of the incubation period, one mesh bag from each treatment was retrieved, and the total N was determined after being dried at room temperature to a constant weight. The loss in total N was subtracted from the initial contraction to assess the N release.…”

Section: N Release Patterns Of Lsrnfmentioning

confidence: 99%

“…Many research studies have proved that the addition of carbon-based amendments can reduce the NO 3 –N-leaching, NH 3 -volatilization, and N 2 O emission and enhance the N retention in soil . Therefore, the declining NUE in alkaline calcareous soils would require the maintenance of soil organic carbon to improve the NUE in a sustainable way . Therefore, there is strong evidence to hypothesize that integrating conventional N fertilizers like urea with carbon-based materials (lignite) as slow-release fertilizers (SRFs) could reduce fertilizer N losses and enhance the NUE.…”

Section: Introductionmentioning

confidence: 99%

“… 9 Therefore, the declining NUE in alkaline calcareous soils would require the maintenance of soil organic carbon to improve the NUE in a sustainable way. 10 Therefore, there is strong evidence to hypothesize that integrating conventional N fertilizers like urea with carbon-based materials (lignite) as slow-release fertilizers (SRFs) could reduce fertilizer N losses and enhance the NUE. We know that the intervention of SRFs is an efficient option to delay the N hydrolysis and to ensure the N supply for a much longer period of time by matching the crop needs.…”

Section: Introductionmentioning

confidence: 99%

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Lignite Scaffolding as Slow-Release N-Fertilizer Extended the SN Retention and Inhibited N Losses in Alkaline Calcareous Soils

et al. 2023

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Conventional nitrogen (N) fertilizers particularly urea mineralized quickly in soil. Without sufficient plant uptake, this rapid mineralization favors the heavy N losses. Lignite is a naturally abundant and cost-effective adsorbent capable of extending multiple benefits as a soil amendment. Therefore, it was hypothesized that lignite as an N carrier for the synthesis of lignite-based slow-release N fertilizer (LSRNF) could offer an eco-friendly and affordable option to resolve the limitations of existing N fertilizer formulations. The LSRNF was developed by impregnating urea on deashed lignite and pelletized by a mixture of polyvinyl alcohol and starch as a binder. The results indicated that LSRNF significantly delayed the N mineralization and extended its release to >70 days. The surface morphology and physicochemical properties of LSRNF confirmed the sorption of urea on lignite. The study demonstrated that LSRNF also significantly decreased the NH3-volatilization up to 44.55%, NO3-leaching up to 57.01%, and N2O-emission up to 52.18% compared to conventional urea. So, this study proved that lignite is a suitable material to formulate new slow-release fertilizers, suiting to alkaline calcareous soils favorably where N losses are further higher compared to non-calcareous soils.

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Section: N Release Patterns Of Lsrnfmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Lignite Scaffolding as Slow-Release N-Fertilizer Extended the SN Retention and Inhibited N Losses in Alkaline Calcareous Soils

et al. 2023

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“…Such a 'mole sieve' effect of biochar, excluding denitrifiers, is one of many explanations for the reduction of N 2 O emissions observed when biochar is applied to soil (Borchard et al 2019;Kammann et al 2012;Kammann et al 2015). High macroporosity might also be key for adding specific products in concentrated BCFs, such as those based on infiltration of molten urea in biochar particles (Wang et al 2021;Xiang et al 2020).…”

Section: The Importance Of Surface Area and Porositymentioning

confidence: 99%

“…Physical protection of low solubility N forms within biochar structures could provide high-N content and slow release. The case of infiltration of molten urea into biochar structures is an interesting example of such applications, where nearly complete and slow release of the urea N was obtained (Xiang et al 2020;Wang et al 2021). Such application deserves further research, notably in terms of the pore distribution of the biochar needed to maximize this effect, as well as the chemical reactions taking place when using molten urea.…”

Section: Implications For Biochar-based Fertilizer Designmentioning

confidence: 99%

Enhancing plant N uptake with biochar-based fertilizers: limitation of sorption and prospects

et al. 2022

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Background Biochar-based fertilizer products (BCF) have been reported to increase both crop yield and N-use efficiency. Such positive effects are often assumed to result from the slow-release of N adsorbed on BCF structures. However, a careful review of the literature suggests that actual mechanisms remain uncertain, which hampers the development of efficient BCF products. Scope Here, we aim at reviewing BCF mechanisms responsible for enhanced N uptake by plants, and evaluate the potential for further improvement. We review the capacity of biochar structures to adsorb and release N forms, the biochar properties supporting this effect, and the methods that have been proposed to enhance this effect. Conclusions Current biochar products show insufficient sorption capacity for the retention of N forms to support the production of slow-release BCFs of high enough N concentration. Substantial slow-release effects appear to require conventional coating technology. Sorption capacity can be improved through activation and additives, but currently not to the extent needed for concentrated BCFs. Positive effects of commercial BCFs containing small amount of biochar appear to result from pyrolysis-derived biostimulants. Our review highlights three prospects for improving N retention: 1) sorption of NH3 gas on specifically activated biochar, 2) synergies between biochar and clay porosities, which might provide economical sorption enhancement, and 3) physical loading of solid N forms within biochar. Beyond proof of concept, quantitative nutrient studies are needed to ascertain that potential future BCFs deliver expected effects on both slow-release and N use efficiency.

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Land-neutral negative emissions through biochar-based fertilization—assessing global potentials under varied management and pyrolysis conditions

Werner,

Lucht,

Kammann

et al. 2024

Mitig Adapt Strateg Glob Change

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Climate stabilization is crucial for restabilizing the Earth system but should not undermine biosphere integrity, a second pillar of Earth system functioning. This is of particular concern if it is to be achieved through biomass-based negative emission (NE) technologies that compete for land with food production and ecosystem protection. We assess the NE contribution of land- and calorie-neutral pyrogenic carbon capture and storage (LCN-PyCCS) facilitated by biochar-based fertilization, which sequesters carbon and reduces land demand by increasing crop yields. Applying the global biosphere model LPJmL with an enhanced representation of fast-growing species for PyCCS feedstock production, we calculated a land-neutral global NE potential of 0.20–1.10 GtCO2 year−1 assuming 74% of the biochar carbon remaining in the soil after 100 years (for + 10% yield increase; no potential for + 5%; 0.61–1.88 GtCO2 year−1 for + 15%). The potential is primarily driven by the achievable yield increase and the management intensity of the biomass producing systems. NE production is estimated to be enhanced by + 200–270% if management intensity increases from a marginal to a moderate level. Furthermore, our results show sensitivity to process-specific biochar yields and carbon contents, producing a difference of + 40–75% between conservative assumptions and an optimized setting. Despite these challenges for making world-wide assumptions on LCN-PyCCS systems in modeling, our findings point to discrepancies between the large NE volumes calculated in demand-driven and economically optimized mitigation scenarios and the potentials from analyses focusing on supply-driven approaches that meet environmental and socioeconomic preconditions as delivered by LCN-PyCCS.

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Study on the nitrogen-releasing characteristics and mechanism of biochar-based urea infiltration fertilizer

Cited by 7 publications

References 25 publications

Lignite Scaffolding as Slow-Release N-Fertilizer Extended the SN Retention and Inhibited N Losses in Alkaline Calcareous Soils

Lignite Scaffolding as Slow-Release N-Fertilizer Extended the SN Retention and Inhibited N Losses in Alkaline Calcareous Soils

Enhancing plant N uptake with biochar-based fertilizers: limitation of sorption and prospects

Land-neutral negative emissions through biochar-based fertilization—assessing global potentials under varied management and pyrolysis conditions

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