Aug 2026· International Journal of Plant Production· Vol 20· 1 citation· 180 references
Abstract
The growing demand for food and the environmental concerns raised by excessive chemical fertilizer use have increased interest in sustainable soil fertility management practices. Biofertilizers (BFs) contain beneficial microorganisms that improve nutrient cycling and support plant growth. Biochar (BC), a carbon (C) rich material produced from biomass pyrolysis, improves soil structure, nutrient retention, and soil health. Although both BF and BC have been extensively studied individually, few studies have examined their combined effects. This systematic review summarizes the results from 66 peer-reviewed studies published between 2015 and 2025. The studies were identified through the Web of Science Core Collection and screened following Preferred Reporting Items for Systematic Reviews and MetaAnalyses (PRISMA) guidelines. The review evaluates the combined effects of BC and BF application on soil quality, nutrient availability, crop growth, stress tolerance, and environmental emissions. It was found that the combined application of BC and BFs improved microbial activity, soil enzyme activity, nutrient uptake, crop biomass, and yield more effectively than single applications. The reported reductions in global warming potential (GWP) and greenhouse gas intensity (GHGI) also indicated their environmental benefits. However, the effectiveness of BC+BF co-application varied, depending on biochar feedstock, pyrolysis conditions, microbial strains, application methods, and soil properties. Current challenges for co-application of BC and BFs include determining optimal application rates, selecting suitable biochar materials, and the limited availability of long-term and large-scale field studies. Overall, BC and BFs co-application shows strong potential for improving agricultural sustainability and resilience. Future studies should focus on long-term field experiments across different agroecological conditions.
The increasing need to ensure global food security and promote sustainable agricultural practices has necessitated the development of alternative approaches to the environmental problems caused by the use of traditional mineral fertilizers. This review article, prepared within this context, comprehensively examines the development of biochar-coated controlled-release fertilizers (BCSRFs) over the last decade (2015–2025). The study evaluates in detail the production techniques of BCSRFs, the properties of coating materials, nutrient release mechanisms, and the impacts of these systems on agricultural productivity and environmental sustainability. Furthermore, environmental gains such as increased nutrient use efficiency (NUE), reduced greenhouse gas emissions and nutrient leaching, as well as economic feasibility and scalability are discussed. With the potential to improve soil fertility and limit environmental losses, BCSRFs stand out as an innovative and promising solution for modern agricultural systems. This review aims to synthesize the existing literature and provide a scientific framework for future research and applications.
Hasine Elçi· Selcuk journal of agricultur...· 0 citations
Biochar has emerged as one of the most promising nature-based strategies for improving soil quality, enhancing crop productivity and supporting climate-smart agriculture. However, the agronomic performance of biochar remains highly variable because its effects are governed by complex interactions among feedstock characteristics, pyrolysis conditions, soil properties and management practices. This review synthesizes recent advances in biochar research (2019–2026), examining how production variables determine biochar physicochemical properties and how these properties subsequently influence soil functioning, plant performance and long-term agricultural sustainability. The review integrates evidence on feedstock selection, pyrolysis technologies, biochar modification strategies and the relationships between biochar properties and soil physical, chemical and biological processes. Particular attention is given to crop productivity, nutrient use efficiency, stress mitigation, contaminant immobilization, greenhouse gas mitigation and long-term soil resilience. Across the literature, the most consistent agronomic benefits were observed when biochar was applied to degraded or resource-limited soils and integrated with complementary management practices, whereas responses were often limited under fertile soils, low application rates or short experimental periods. Rather than identifying a universally superior biochar, the evidence indicates that agronomic performance depends on matching biochar characteristics to specific production objectives and environmental conditions. Based on these findings, this review proposes a transition from generalized biochar application towards optimized deployment strategies supported by standardized characterization, long-term multi-site validation and integrated environmental and economic assessments. This synthesis provides a comprehensive framework for guiding future research and facilitating the effective implementation of biochar within sustainable and regenerative agricultural systems.
Ágata Cristiana Correia, C. Pessoa, P. Legoinha et al.· The Scientist· 0 citations
Rice-based agroecosystems in Bangladesh face mounting challenges from nutrient imbalance, declining soil organic matter, climate-related stress and inefficient fertilizer management. While intensive fertilizer use has raised productivity, it has also reduced nutrient use efficiency and degraded soil quality. Nanofertilizers and organic soil amendments have emerged as complementary strategies to improve nutrient management and soil health in rice systems. This review synthesizes 85 peer-reviewed field, pot and laboratory studies (2005-2025) from Bangladesh and comparable South Asian agroecosystems, evaluating the individual and combined effects of nanofertilizers and soil amendments (biochar, compost, green manure, lime) on rice productivity, soil properties, nutrient dynamics and environmental outcomes. Nanofertilizers improve nutrient use efficiency through controlled release, while amendments enhance soil organic carbon, microbial activity and nutrient retention. Combined application produces synergistic gains, with yield improvements of approximately 25-40% reported under specific experimental conditions. These integrated strategies reduce nutrient losses, strengthen soil function and support more efficient, climate-resilient rice production aligned with SDGs 2, 6, 13 and 15. Most available evidence, however, derives from short-term field and pot trials; long-term, multi-location studies are needed to evaluate nanoparticle fate, environmental safety, economic feasibility and farmer adoption under diverse rice-growing conditions before large-scale deployment.
Ishrat Alam, Khalid Syfullah, Bijoya Saha et al.· Agricultural Science Digest...· 0 citations
Biochar, a carbon-rich solid produced through oxygen-limited pyrolysis of biomass, is increasingly considered a soil amendment for sustainable soil fertility management. Indian agriculture faces continuing pressure from soil degradation, declining soil organic carbon, nutrient depletion, crop-residue burning and climate variability, all of which constrain productivity and resource-use efficiency. This review synthesises literature and field-based evidence relevant to the use of biochar in Indian soil-crop systems. It discusses biochar production through slow, fast and flash pyrolysis using crop residues, woody biomass, and livestock or poultry manure at 300–700 °C, and relates these production conditions to key properties, including porosity, specific surface area, alkaline pH, fixed carbon content and nutrient composition. The review also examines the principal mechanisms through which biochar improves soil fertility, including modification of bulk density, water-holding capacity, aggregate stability, cation exchange capacity, soil reaction, nutrient retention and microbial activity. Evidence reviewed here indicates that biochar can reduce nutrient leaching, influence nitrogen and phosphorus dynamics, contribute to soil carbon sequestration, and mitigate selected greenhouse gas emissions, although responses depend on feedstock, pyrolysis conditions, soil type and crop requirement. Field observations from India suggest that applications within the range of 5–20 t ha⁻¹ can improve the productivity of rice, wheat, maize, legumes, oilseeds, plantation crops and vegetables, with stronger responses generally reported in acidic, sandy and degraded soils. The review further identifies practical constraints to adoption, including production cost, inconsistent product quality, limited standardisation, insufficient extension support and variable soil-crop compatibility. Integrating biochar with integrated nutrient management and decentralised residue management may support more sustainable soil fertility strategies in India.
Manoj Kumar, A. Pandey, Ashutosh Singh et al.· International Journal of Env...· 0 citations
Biochar, a carbon-rich product resulting from the thermochemical transformation of organic biomass under limited oxygen condition, is currently drawing much worldwide attention due to its multiple applications in carbon sequestration, soil improvement, environmental remediation, and biomass waste management. Initially, the focus of research was primarily on the technical possibilities of biochar production, its economic aspects, and its contribution to climate change mitigation through carbon sequestration and the promotion of sustainable agriculture. Nevertheless, recent research indicates the high complexity and dynamics of biochar interactions with the environment, driven by a combination of factors like feedstock type, process conditions, biochar properties, and other factors. While biochar exhibits multiple beneficial effects, including improving soil structure, enhancing nutrient retention, promoting microbial activities, and remediating contaminants, several environmental risks associated with biochar application have also been identified, namely the formation of polycyclic aromatic hydrocarbons (PAHs), heavy metal contamination, creation of persistent free radicals, changes in soil chemistry, and modification of soil microbial community structure. Such risks are greatly related to production process parameters, treatment methods, and biochar application practices. Moreover, differences in feedstock choice, pyrolysis temperature, reactor design, biochar application rate, and analytical methods used make comparative analysis of results difficult.
O. E. Ojewumi, Gang Chen, M. Ojewumi· Green· 0 citations
Sustainable agriculture is increasingly challenged by soil degradation, environmental pollution, and climate change, necessitating the pragmatic and eco-friendly approach. This review systematically synthesizes the role of biochar as multifunctional soil management strategy in enhancing soil health and sustainable environmental management, with particular emphasis on the critical roles of feedstock type and pyrolysis conditions in governing biochar performance. To address existing knowledge gaps, we comprehensively evaluate recent available literature on biochar-based environmental remediation, focusing on key indicators of agricultural sustainability, including nutrients availability, soil biological activity, climate change mitigation, biochar-assisted phytostabilization, and crop productivity. Current evidence indicates that biochar application can achieve a net negative carbon footprint, mitigate greenhouse gas emissions and heavy metal contamination, and improve soil structure, fertility, and overall crop productivity on sustainable-basis. However, these benefits largely depend upon the various important biochar production factors including feedstock source, pyrolysis temperature, biochar stability, residence time, rate of application, and soil pH. Beyond its function as a soil amendment, biochar also serves as a multifunctional resource contributing to bioenergy production, waste reduction, and long-term carbon sequestration. At the same time, this review identifies critical research gaps, including the long-term field performance of biochar, mechanisms underlying the interactions between biochar and agronomic practices, and the environmental and human health risks associated with large-scale agricultural applications. Overall, this work highlights the importance of feedstock selection and pyrolysis parameters in designing biochar for environmental remediation and outlines future research directions to refine biochar engineering, application guidelines, and risk assessment frameworks for its sustainable use.
Ismail Khan, Faming Wang, Abdul Rehman et al.· International journal of phy...· 0 citations
