Labile and stable pools of organic matter in soil amended with sewage sludge biochar

Figueiredo, Cícero Célio de; Farias, Walda Monteiro; Melo, Bruno Araújo; Chagas, Jhon Kenedy Moura; Vale, Ailton Teixeira do; Coser, Thais Rodrigues

doi:10.1080/03650340.2018.1524577

Cited by 14 publications

(3 citation statements)

References 42 publications

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“…Pyrolysis temperature plays a critical role in determining the proportion of labile and recalcitrant carbon pool in the soil organic matter. A previous study found that pyrolysis at high temperatures resulted in recalcitrant carbon pool dominating sewage sludge biochar, while labile carbon pool dominated at low temperatures (de Figueiredo et al 2019). Furthermore, increasing the pyrolysis temperature has been shown to decrease the effect of type of feedstock on the amount of labile carbon pool in biochar.…”

Section: Interactions Between Organic Carbon Contained In Biochar Andmentioning

confidence: 98%

Development of the straw biochar returning concept in China

Meng

Sanganyado

et al. 2019

Biochar

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Biochar produced from straw has been shown to improve soil physicochemical properties. This review introduces the fundamental concepts, the broad applications, and underlying theory of straw biochar returning. Current developments in biochar industry and the production practices prevalent among enterprises in China are critiques. This review analyzes current knowledge gaps, challenges, and opportunities in the industrial application of straw biochar returning. Biochar standards, the quantitative and qualitative analysis methods for biochar, and high-value-added products that are based on biochar are critically examined with goal of providing recommendations for future studies. We propose production and modification of biochar that is application oriented to enhance its fitness for purpose as well as long-term and large-space-scale field study to better understand its impact on soil properties and ecotoxicology. Finally, we make prospects for the future development of SBR, including constructing a standard system about straw biochar returning and promoting self-discipline of biochar industry and the establishment of a biochar-based agricultural production model.

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Section: Interactions Between Organic Carbon Contained In Biochar Andmentioning

confidence: 98%

Development of the straw biochar returning concept in China

Meng

Sanganyado

et al. 2019

Biochar

View full text Add to dashboard Cite

show abstract

“…There have been various studies in which BC produced at lower temperature ranging from 450 to 550 • C stimulated positive priming when added to sandy loam (Table 3). Overall, BC promoted increases in C sequestration, organic carbon retention, SOM, mineralization, phosphorous and potassium content, and plant biomass [136][137][138][139]. Conversely, one study reported a decrease in soil microbial biomass and SOM mineralization when crop residue-derived BC (450 • C) was applied to sandy loam soil [140].…”

Section: Soil Organic Matter (Som)mentioning

confidence: 99%

Biochar—A Panacea for Agriculture or Just Carbon?

2020

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The sustainable production of food faces formidable challenges. Foremost is the availability of arable soils, which have been ravaged by the overuse of fertilizers and detrimental soil management techniques. The maintenance of soil quality and reclamation of marginal soils are urgent priorities. The use of biochar, a carbon-rich, porous material thought to improve various soil properties, is gaining interest. Biochar (BC) is produced through the thermochemical decomposition of organic matter in a process known as pyrolysis. Importantly, the source of organic material, or ‘feedstock’, used in this process and different parameters of pyrolysis determine the chemical and physical properties of biochar. The incorporation of BC impacts soil–water relations and soil health, and it has been shown to have an overall positive impact on crop yield; however, pre-existing physical, chemical, and biological soil properties influence the outcome. The effects of long-term field application of BC and how it influences the soil microcosm also need to be understood. This literature review, including a focused meta-analysis, summarizes the key outcomes of BC studies and identifies critical research areas for future investigations. This knowledge will facilitate the predictable enhancement of crop productivity and meaningful carbon sequestration.

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“…[2]. Low (neutral)-carbon agriculture (LCA) [3] strategies and environment-friendly agricultural practices [4] are examples of those approaches that focus, among other things, on balancing labile and stable soil organic carbon (SOC) in the soil [5]. Regarding organic-based fertilizers with conventional production technologies, there is still potential for further study and adoption of new types and combinations of organic sources in agricultural soils [6,7].…”

Section: Introductionmentioning

confidence: 99%

Deciphering the Effectiveness of Humic Substances and Biochar Modified Digestates on Soil Quality and Plant Biomass Accumulation

et al. 2022

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The effective use of digestate as exogenous organic matter to enhance soil carbon sequestration depends on the balance between labile and recalcitrant organic carbon, which is influenced by the type of feedstock, the fermentation process, and the fraction (liquid, solid) of the fermented product used. In this work, in order to change the ratio of labile to stable carbon in the resulting fertiliser, the digestate was mixed with organic carbon-rich supplements: biochar and Humac (a humic acid-rich substance). The pot experiment was carried out under controlled conditions with maize (Zea mays L.) in soil amended with the digestate (D), which was incubated with Humac (H), biochar (B), or a combination of both (D + B + H) before the application. Digestate enriched with Humac showed improved short-term nutrient (carbon, phosphorus, nitrogen) transformation, as indicated by soil enzyme activity and the highest maize biomass production of. Total carbon content, C:N ratio, short-term respiration activity, and nitrification were most enhanced by digestate enriched with either biochar or combined biochar + Humac). Long-term nitrogen mineralization was mostly enhanced by digestate + Humac, as indicated by amino-acid-induced respiration and urease activity. Short-term positive effects of digestate + biochar (eventually + Humac) on catabolism were proven, whereas their long-term effects on nutrient mineralization were negative (i.e., biochar-mediated immobilization, sequestration), which should be the focus of further research in future.

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Labile and stable pools of organic matter in soil amended with sewage sludge biochar

Cited by 14 publications

References 42 publications

Development of the straw biochar returning concept in China

Development of the straw biochar returning concept in China

Biochar—A Panacea for Agriculture or Just Carbon?

Deciphering the Effectiveness of Humic Substances and Biochar Modified Digestates on Soil Quality and Plant Biomass Accumulation

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