Reviewing the role of biochar in paddy soils: An agricultural and environmental perspective

Novair, Sepideh Bagheri; Cheraghi, Meysam; Faramarzi, Farzaneh; Lajayer, Behnam Asgari; Senapathi, Venkatramanan; Astatkie, Tess; Price, G.W.

doi:10.1016/j.ecoenv.2023.115228

Cited by 21 publications

(6 citation statements)

References 204 publications

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“…Prior research had indicated that the application of biochar-based amendments had an impact on soil properties (Awasthi et al, 2019;Bagheri Novair et al, 2023;Zhang et al, 2023;Zhong et al, 2023), and the ndings were in accordance with our research. Our results indicated that soil properties including pH, TN, TP, CEC, SOC, and DOC were improved by applying biochar-based amendments.…”

Section: Effect On Soil Properties and CD Fractionsupporting

confidence: 90%

“…2a). The surface of biochar contained negatively charged function groups, for instance, phenols, hydroxyl, amine, carboxyl, and mercaptan compounds, which were capable of binding hydrogen ions from soil solution and increase soil pH (Bagheri Novair et al, 2023;Nguyen et al, 2017). In addition, there was the possibility that biochar-based amendments could stimulate or enrich the activity of soil microorganisms, increasing soil pH (Lin et al, 2022;Xie et al, 2023;Ibrahim et al, 2021).…”

Section: Effect On Soil Properties and CD Fractionmentioning

confidence: 99%

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Impacts of biochar-based amendment on soil cadmium immobilization, rice grain cadmium accumulation and yield

Han,

Wu,

Yang

et al. 2024

Preprint

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Cadmium (Cd) contamination in soil is of severe health and environmental concern because of its threat to human health, food safety, and ecosystem sustainability. The in situ stabilization of Cd has been recognized as a potentially economical technique for the rehabilitation of soil polluted with Cd. Biochar has recently received much attention as an eco-friendly and recyclable soil amendment, which is more beneficial for plant growth, soil health, and restoration of contaminated soil. An experiment was performed in the field to study the efficiency of three different types of biochar: maize straw biochar, bamboo biochar, and coconut shell activated carbon in combination with rape organic fertilizer (ROF), calcium magnesium phosphate fertilizer (CMPF), and fulvic acid (MFA), respectively, on soil Cd immobilization, Cd uptake by rice, and rice yield. The experiment indicated that the biochar-based amendments reduced soil Cd bioavailability and rice Cd content by 9.58%-27.06% and 19.30%-71.77%, respectively. The transformation of exchangeable Cd (Ex-Cd) to carbonate bound Cd (Ca-Cd), Fe-Mn oxide bond (Ox-Cd), and residual (Re-Cd) in soil accounted for the mitigation of Cd absorption and enrichment by rice. In addition, the biochar-based amendments altered soil physicochemical properties and promoted soil health. Biochar-based amendments enhanced Fe and Mn plaques by 47.31%-160.34% and 25.72%-73.09%, respectively. The correlation analysis revealed that leaf Cd and Fe/Mn plaques primarily controlled Cd uptake by rice, and soil pH, Eh, CEC, SOC, Fe/Mn plaques, and TP influenced Cd bioavailability in soil. This field study demonstrated that maize straw and bamboo biochar-based amendments had a higher benefit and were potentially applicable to ameliorating metal-contaminated agricultural soil.

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Section: Effect On Soil Properties and CD Fractionsupporting

confidence: 90%

Section: Effect On Soil Properties and CD Fractionmentioning

confidence: 99%

Impacts of biochar-based amendment on soil cadmium immobilization, rice grain cadmium accumulation and yield

Han,

Wu,

Yang

et al. 2024

Preprint

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“…Consistent with our hypothesis, the application of organic fertilizer and the addition of biochar, although exhibiting somewhat different effects, both positively contribute to the enhancement of soil nutrition. As shown in previous studies (Maltas et al, 2013;Ren H. et al, 2020;Viketoft et al, 2021), organic fertilizer excels in elevating nutrient levels, leading to a significant and rapid increase in extractable and soluble N, P, and K. In contrast, biochar has higher levels of C and K, but lower levels of N and P. Due to its slow decomposition, biochar made notable contributions to soil structure through its inactive structure (Sohi et al, 2010;Novair et al, 2023). As expected, compared to organic fertilizer application, biochar application had stronger effects on total soil C and K, as well as soil pH.…”

Section: Organic Fertilizer and Biochar Applications Positively But D...mentioning

confidence: 84%

“…Biochar is a carbon-rich substance obtained from the pyrolysis of waste feedstock. Biochar itself has a relatively lower nutrient content than organic fertilizer, however it has a high cation exchange capacity due to its porous structure and negative surface charge, which means it can adsorb and hold onto nutrients in the soil, preventing them from leaching away (Sohi et al, 2010;Novair et al, 2023). As a result, biochar has multiple benefits in promoting soil carbon sequestration, increasing plant nutrient uptake, improving soil aggregation and water holding capacity, enhancing soil nutrient availability, reducing GHGs emissions, benefiting crop growth and productivity, and being efficient in immobilizing harmful chemical pollutants (Sohi et al, 2010;Zhao et al, 2014).…”

Section: Introductionmentioning

confidence: 99%

“…Metting (1981) summarized that soil cyanobacteria, as other soil algae, may be significantly influenced by a number of environmental factors: humidity, soil temperature, soil texture, rO, nutrition, and biotic interactions. As organic fertilization and biochar applications may significantly affect soil physicochemical property (Lima et al, 2009;Novair et al, 2023), they should have great impacts on soil cyanobacterial community. Generally, organic fertilizer provides a large amount of diverse organic C source, increases nutrient availability, improves soil structure, significantly influencing soil microbe (Werner and Dindal, 1990;Ponge et al, 2013;Viketoft et al, 2021).…”

Section: Introductionmentioning

confidence: 99%

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Both organic fertilizer and biochar applications enhanced soil nutrition but inhibited cyanobacterial community in paddy soils

Zou,

Jiang,

Guan

et al. 2024

Front. Environ. Sci.

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Cyanobacteria plays an important role in other ecological processes in paddy soils, particularly in terms of nitrogen input to the ecosystem. Organic fertilizer and biochar are common soil amendment materials used to preserve soil health in agricultural intensification background. However, the consequent increase in soil nutrition may inhibit soil cyanobacteria, therefore decreasing nitrogen fixation and changes other soil processes. To test this hypothesis, we established a 2 × 2 full factorial experiment in a paddy field in South China, which included four treatments: Ctr (control, receiving no organic fertilization or biochar addition), +OF (organic fertilizer application only), +BC (biochar application only), and +Mix (organic fertilizer and biochar applications). The soil cyanobacterial community was analyzed using metagenomics technology, and 14 soil property variables were measured. The results suggested that organic fertilizer was effective in enhancing nutrient levels, leading to a significant increase in extractable and soluble nitrogen, phosphorus, and potassium. In contrast, biochar application had a stronger effect on total soil carbon, potassium, and soil pH. However, both organic fertilizer and biochar applications induced significant decreases in overall cyanobacterial abundance and species number. Dominant cyanobacterial organisms, particularly the two most abundant genera, Leptolyngbya and Phormidium, experienced a greater decrease compared to others. Canonical correlation analyses and structural equation models indicated that organic fertilizer and biochar applications affected soil cyanobacterial community mainly through soil available nitrogen and pH. In total, the present study highlighted that both organic fertilizer and biochar applications in paddy soils notably change soil physicochemical traits, inhibiting rather than benefiting cyanobacterial microorganisms, especially the dominant ones, and potentially reducing nitrogen input. Our study reveals the impacts of oragnic fertilizer and biochar applications in paddies on soil cyanobacteria and how the consequent changes in soil properties mediate this impact, thereby enhancing our understanding of the responses of different soil microbial groups to soil improvement measures.

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Bioeconomy for Sustainable Bioenergy and Biofuel Generation

Kag,

Kukreti,

Kumar

et al. 2024

Bioeconomy for Sustainability

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Reviewing the role of biochar in paddy soils: An agricultural and environmental perspective

Cited by 21 publications

References 204 publications

Impacts of biochar-based amendment on soil cadmium immobilization, rice grain cadmium accumulation and yield

Impacts of biochar-based amendment on soil cadmium immobilization, rice grain cadmium accumulation and yield

Both organic fertilizer and biochar applications enhanced soil nutrition but inhibited cyanobacterial community in paddy soils

Bioeconomy for Sustainable Bioenergy and Biofuel Generation

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