Biochar application is claimed to improve nutrient availability in many problem soils; however, pristine biochars are often reported to produce inconsistent results. Therefore, appropriate biochar modification techniques are required to retain soil nutrients at an optimum level. To increase Nitrogen (N) and Phosphorus (P) availability in coastal saline soil, two slow pyrolyzed biochars viz domestic organic waste (DWB) and farmyard manure (FMB) were modified with MgCl 2 . Ten different treatments comprising the biochars (pristine and modified) with and without the recommended fertilizer were applied (2% w/w) to the soil and incubated for ninety days. The soils were analyzed for pH, EC, available , and different phosphorus fractions sequentially extracted by NH 4 Cl, NaHCO 3 , NaOH, and HCl. During the incubation period, biochar treatments increased all phosphorus and nitrogen fractions than the control and recommended fertilizer treatment. The application of FMB significantly ( p < 0.05) increased NH 4 Cl, NaHCO 3 , and NaOH extractable P fractions from DWB, while HCl soluble fraction was enhanced ( p > 0.05) by DWB. The increased Al and/or Fe bound phosphate after 60 days of incubation had significant correlations to decreasing soil pH and NaHCO 3 -P, indicating reduced availability with time. Further Mg modification slightly increased P availability only after 60 days of incubation. The modification also improved both nitrogen fractions but significantly ( p < 0.05) increased the NO 3 -N content which could be the result of electrostatic attraction between Mg 2 + and ions. Overall, Mg-modified biochar may retain both phosphates and nitrates in soil. However, the magnitude of retention will vary depending on biochar type, nutrient species, and aging in soil.
Farrell, M., Kuhn, T.K., Macdonald, L.M., Maddern, T.M., Murphy, D.V., Hall, P.A., Singh, B.P., Baumann, K., Krull, E.S. and Baldock, J.A. (2013) Microbial Utilisation of Biochar-Derived Carbon. Science of the Total Environment, 465, 288-297. https://doi.org/10.1016/j.scitotenv.2013.03.090
Woolf, D., Amonette, J.E., Street-Perrott, F.A., Lehmann, J. and Joseph, S. (2010) Sustainable Biochar to Mitigate Global Climate Change. Nature Communications, 1, Article No. 56. https://doi.org/10.1038/ncomms1053
Atkinson, C.J., Fitzgerald, J.D. and Hipps, N.A. (2010) Potential Mechanisms for Achieving Agricultural Benefits from Biochar Application to Temperate Soils: A Review. Plant and Soil, 337, 1-18. https://doi.org/10.1007/s11104-010-0464-5
Jeffery, S., Verheijen, F.G., van der Velde, M. and Bastos, A.C. (2011) A Quantitative Review of the Effects of Biochar Application to Soils on Crop Productivity Using Meta-Analysis. Agriculture, Ecosystems & Environment, 144, 175-187. https://doi.org/10.1016/j.agee.2011.08.015
Barrow, C. (2012) Biochar: Potential for Countering Land Degradation and for Improving Agriculture. Applied Geography, 34, 21-28. https://doi.org/10.1016/j.apgeog.2011.09.008
Rahman, M.H., Allister, W.H. and Steven, J.S. (2011) Biochar Impacts on Physical and Hydrological Properties of Allophanic Soils. New Zealand Biochar Research Centre, Massey University, Palmerston North.
Parvage, M.M., Ulén, B., Eriksson, J., Strock, J. and Kirchmann, H. (2013) Phosphorus Availability in Soils Amended with Wheat Residue Char. Biology and Fertility of Soils, 49, 245-250. https://doi.org/10.1007/s00374-012-0746-6
Rahman, M.H., Pellowe, K., Holmes, A. and Saunders, S. (2012) Characterization of Biosolid and Biochar Used as Soil Conditioners: Chemical Properties. Massey University, Palmerston North.
Biswas, A. and Biswas, A. (2014) Comprehensive Approaches in Rehabilitating Salt Affected Soils: A Review on Indian Perspective. Open Transactions on Geosciences, 1, 13-24.
SRDI (Soil Resource Development Institute) (2010) Saline Soils of Bangladesh. Soil Resource Development Institute, SRMAF Project, Ministry of Agriculture, Mrittika Bhaban, Krishikhamar Sarak, Farmgate, Dhaka-1215, Bangladesh.
Salehin, M., Chowdhury, M.M.A., Clarke, D., Mondal, S., Nowreen, S., Jahiruddin, M. and Haque, A. (2018) Mechanisms and Drivers of Soil Salinity in Coastal Bangladesh. In: Nicholls, R., Hutton, C., Adger, W., Hanson, S., Rahman, M. and Salehin, M., Eds., Ecosystem Services for Well-Being in Deltas, Palgrave Macmillan, Cham, 333-347. https://doi.org/10.1007/978-3-319-71093-8_18
Zheng, H., Wang, X., Chen, L., Wang, Z., Xia, Y., Zhang, Y., Wang, H., Luo, X. and Xing, B. (2018) Enhanced Growth of Halophyte Plants in Biochar-Amended Coastal Soil: Roles of Nutrient Availability and Rhizosphere Microbial Modulation. Plant, cell & Environment, 41, 517-532. https://doi.org/10.1111/pce.12944
Chan, K.Y., Van Zwieten, L., Meszaros, I., Downie, A. and Joseph, S. (2008) Agronomic Values of Greenwaste Biochar as a Soil Amendment. Australian Journal of Soil Research, 45, 629-634. https://doi.org/10.1071/SR07109
Haque, S.A. (2006) Salinity Problems and Crop Production in Coastal Regions of Bangladesh. Pakistan Journal of Botany, 38, 1359-1365.
Holford, I. (1997) Soil Phosphorus: Its Measurement, and Its Uptake by Plants. Australian Journal of Soil Research, 35, 227-240. https://doi.org/10.1071/S96047
Christel, W., Zhu, K., Hoefer, C., Kreuzeder, A., Santner, J., Bruun, S., Magid, J. and Jensen, L.S. (2016) Spatiotemporal Dynamics of Phosphorus Release, Oxygen Consumption and Greenhouse Gas Emissions after Localized Soil Amendment with Organic Fertilisers. Science of the Total Environment, 554-555, 119-129. https://doi.org/10.1016/j.scitotenv.2016.02.152
Xu, G., Zhang, Y., Sun, J. and Shao, H. (2016) Negative Interactive Effects between Biochar and Phosphorus Fertilization on Phosphorus Availability and Plant Yield in Saline Sodic Soil. Science of the Total Environment, 568, 910-915. https://doi.org/10.1016/j.scitotenv.2016.06.079
Ok, Y.S., Chang, S.X., Gao, B. and Chung, H.-J. (2015) SMART Biochar Technology—A Shifting Paradigm towards Advanced Materials and Healthcare Research. Environmental Technology & Innovation, 4, 206-209. https://doi.org/10.1016/j.eti.2015.08.003
Samsuri, A.W., Sadegh-Zadeh, F. and Seh-Bardan, B.J. (2013) Adsorption of As(III) and As(V) by Fe Coated Biochars and Biochars Produced from Empty Fruit Bunch and Rice Husk. Journal of Environmental Chemical Engineering, 1, 981-988. https://doi.org/10.1016/j.jece.2013.08.009
Sizmur, T., Fresno, T., Akgül, G., Frost, H. and Moreno-Jiménez, E. (2017) Biochar Modification to Enhance Sorption of Inorganics from Water. Bioresource Technology, 246, 34-47. https://doi.org/10.1016/j.biortech.2017.07.082
Zhang, M., Gao, B., Yao, Y., Xue, Y. and Inyang, M. (2012) Synthesis of Porous MgO-Biochar Nanocomposites for Removal of Phosphate and Nitrate from Aqueous Solutions. Chemical Engineering Journal, 210, 26-32. https://doi.org/10.1016/j.cej.2012.08.052
USDA (United States Department of Agriculture) (1951) Soil Survey Manual. United States Department of Agriculture, Washington DC.
Fang, C., Zhang, T., Li, P., Jiang, R. and Wang, Y. (2014) Application of Magnesium Modified Corn Biochar for Phosphorus Removal and Recovery from Swine Wastewater. International Journal of Environmental Research and Public Health, 11, 9217-9237. https://doi.org/10.3390/ijerph110909217
SRDI (Soil Resource Development Institute) (2018) Online Fertilizer Recommendation Syestem. Soil Resource Development Institute, Government of Bangladesh, Khamarbari, Dhaka, Bangladesh. http://www.frs-bd.com/
Hedley, M.J., Stewart, J. and Chauhan, B.S. (1982) Changes in Inorganic and Organic Soil Phosphorus Fractions Induced by Cultivation Practices and by Laboratory Incubations. Soil Science Society of America Journal, 46, 970-976. https://doi.org/10.2136/sssaj1982.03615995004600050017x
Chen, C., Condron, L., Davis, M. and Sherlock, R. (2003) Seasonal Changes in Soil Phosphorus and Associated Microbial Properties under Adjacent Grassland and Forest in New Zealand. Forest Ecology and Management, 177, 539-557. https://doi.org/10.1016/S0378-1127(02)00450-4
Naeem, M.A., Khalid, M., Arshad, M. and Ahmad, R. (2014) Yield and Nutrient Composition of Biochar Produced from Different Feedstocks at Varying Pyrolytic Temperatures. Pakistan Journal of Agricultural Sciences, 51, 75-82.
ASTM Committee D-18 on Soil and Rock. (2005) Standard Test Methods for Laboratory Determination of Water (Moisture) Content of Soil and Rock by Mass. ASTM International, West Conshohocken.
Black, C.A., Evans, D.D. and Dinauer, R.C. (1965) Methods of Soil Analysis. American Society of Agronomy, Madison.
Jackson, M. (1962) Soil Chemical Analysis. Constable and Co. Ltd., London, 497 p.
Walkley, A. and Black, I.A. (1934) An Examination of the Degtjareff Method for Determining Soil Organic Matter, and a Proposed Modification of the Chromic Acid Titration Method. Soil Science, 37, 29-38. https://doi.org/10.1097/00010694-193401000-00003
Huq, S.I. and Alam, M. (2005) A Handbook on Analyses of Soil, Plant and Water. BACER-DU, University of Dhaka, Bangladesh, 246 p.
Murphy, J. and Riley, J.P. (1962) A Modified Single Solution Method for the Determination of Phosphate in Natural Waters. Analytica Chimica Acta, 27, 31-36. https://doi.org/10.1016/S0003-2670(00)88444-5
Bremner, J. and Keeney, D. (1966) Determination and Isotope-Ratio Analysis of Different Forms of Nitrogen in Soils: 3. Exchangeable Ammonium, Nitrate, and Nitrite by Extraction-Distillation Methods. Soil Science Society of America Journal, 30, 577-582. https://doi.org/10.2136/sssaj1966.03615995003000050015x
Piash, M.I., Hossain, M.F. and Parveen, Z. (2017) Physico-Chemical Properties and Nutrient Content of Some Slow Pyrolysis Biochars Produced from Different Feedstocks. Bangladesh Journal of Scientific Research, 29, 111-122. https://doi.org/10.3329/bjsr.v29i2.32327
Liu, X.-H. and Zhang, X.-C. (2012) Effect of Biochar on PH of Alkaline Soils in the Loess Plateau: Results from Incubation Experiments. International Journal of Agriculture & Biology, 14, 975-979.
Rangwaswamy, M. (2018) Effect of Biochar on Phosphorus Transformation in an Acid Soil and Its Nutrition in Wheat. M.Sc. Dessertation, Uttar Banga Krishi Viswavidyalaya, Pundibari, Cooch Behar, West Bengal.
Amaizah, N.R., Cakmak, D., Saljnikov, E., Roglic, G., Mrvic, V., Krgovic, R. and Manojlovic, D.D. (2012) Fractionation of Soil Phosphorus in a Long-Term Phosphate Fertilization. Journal of the Serbian Chemical Society, 77, 971-981. https://doi.org/10.2298/JSC110927208A
Mahmoud, E., Ibrahim, M., Abd El-Rahman, L. and Khader, A. (2019) Effects of Biochar and Phosphorus Fertilizers on Phosphorus Fractions, Wheat Yield and Microbial Biomass Carbon in Vertic torrifluvents. Communications in Soil Science and Plant Analysis, 50, 362-372. https://doi.org/10.1080/00103624.2018.1563103
Wu, L., Wei, C., Zhang, S., Wang, Y., Kuzyakov, Y. and Ding, X. (2019) MgO-Modified Biochar Increases Phosphate Retention and Rice Yields in Saline-Alkaline Soil. Journal of Cleaner Production, 235, 901-909. https://doi.org/10.1016/j.jclepro.2019.07.043
Peng, X., Horn, R. and Smucker, A. (2007) Pore Shrinkage Dependency of Inorganic and Organic Soils on Wetting and Drying Cycles. Soil Science Society of America Journal, 71, 1095-1104. https://doi.org/10.2136/sssaj2006.0156
Glaser, B. and Lehr, V.-I. (2019) Biochar Effects on Phosphorus Availability in Agricultural Soils: A Meta-Analysis. Scientific Reports, 9, Article No. 9338. https://doi.org/10.1038/s41598-019-45693-z
Opala, P., Okalebo, J. and Othieno, C. (2012) Effects of Organic and Inorganic Materials on Soil Acidity and Phosphorus Availability in a Soil Incubation Study. ISRN Agronomy, 2012, Article ID: 597216. https://doi.org/10.5402/2012/597216
Liu, S., Meng, J., Jiang, L., Yang, X., Lan, Y., Cheng, X. and Chen, W. (2017) Rice Husk Biochar Impacts Soil Phosphorous Availability, Phosphatase Activities and Bacterial Community Characteristics in Three Different Soil Types. Applied Soil Ecology, 116, 12-22. https://doi.org/10.1016/j.apsoil.2017.03.020
Taghavimehr, J. (2015) Effect of Biochar on Soil Microbial Communities, Nutrient Availability, and Greenhouse Gases in Short Rotation Coppice Systems of Central Alberta. Master’s Thesis, University of Alberta, Edmonton. https://doi.org/10.7939/R32Z1311P
Jiang, D., Chu, B., Amano, Y. and Machida, M. (2018) Removal and Recovery of Phosphate from Water by Mg-Laden Biochar: Batch and Column Studies. Colloids and Surfaces A: Physicochemical and Engineering Aspects, 558, 429-437. https://doi.org/10.1016/j.colsurfa.2018.09.016
Murphy, P.N. and Stevens, R. (2010) Lime and Gypsum as Source Measures to Decrease Phosphorus Loss from Soils to Water. Water, Air, & Soil Pollution, 212, 101-111. https://doi.org/10.1007/s11270-010-0325-0
Condron, L.M. and Newman, S. (2011) Revisiting the Fundamentals of Phosphorus Fractionation of Sediments and Soils. Journal of Soils and Sediments, 11, 830-840. https://doi.org/10.1007/s11368-011-0363-2
McLaughlin, M.J., McBeath, T.M., Smernik, R., Stacey, S.P., Ajiboye, B. and Guppy, C. (2011) The Chemical Nature of P Accumulation in Agricultural Soils—Implications for Fertiliser Management and Design: An Australian Perspective. Plant and Soil, 349, 69-87. https://doi.org/10.1007/s11104-011-0907-7
Zhang, H. (2016) Biochar Characteristics and Effects on Phosphorus Availability and Dynamics in Tropical Soils. Griffith University, Queensland.
Yao, Y., Gao, B., Zhang, M., Inyang, M. and Zimmerman, A.R. (2012) Effect of Biochar Amendment on Sorption and Leaching of Nitrate, Ammonium, and Phosphate in a Sandy Soil. Chemosphere, 89, 1467-1471. https://doi.org/10.1016/j.chemosphere.2012.06.002
Shenbagavalli, S. and Mahimairaja, S. (2012) Characterization and Effect of Biochar on Nitrogen and Carbon Dynamics in Soil. International Journal of Advanced Biological Research, 2, 249-255.
Esfandbod, M., Phillips, I., Miller, B., Rashti, M.R., Lan, Z., Srivastava, P., Singh, B. and Chen, C. (2017) Aged Acidic Biochar Increases Nitrogen Retention and Decreases Ammonia Volatilization in Alkaline Bauxite Residue Sand. Ecological Engineering, 98, 157-165. https://doi.org/10.1016/j.ecoleng.2016.10.077
Nguyen, T.T.N., Xu, C.-Y., Tahmasbian, I., Che, R., Xu, Z., Zhou, X., Wallace, H.M. and Bai, S.H. (2017) Effects of Biochar on Soil Available Inorganic Nitrogen: A Review and Meta-Analysis. Geoderma, 288, 79-96. https://doi.org/10.1016/j.geoderma.2016.11.004
Gong, Y.-P., Ni, Z.-Y., Xiong, Z.-Z., Cheng, L.-H. and Xu, X.-H. (2017) Phosphate and Ammonium Adsorption of the Modified Biochar Based on Phragmites Australis after Phytoremediation. Environmental Science and Pollution Research, 24, 8326-8335. https://doi.org/10.1007/s11356-017-8499-2
Chen, C., Phillips, I., Condron, L., Goloran, J., Xu, Z. and Chan, K. (2013) Impacts of Greenwaste Biochar on Ammonia Volatilisation from Bauxite Processing Residue Sand. Plant and Soil, 367, 301-312. https://doi.org/10.1007/s11104-012-1468-0
Taghizadeh-Toosi, A., Clough, T.J., Sherlock, R.R. and Condron, L.M. (2012) A Wood Based Low-Temperature Biochar Captures NH 3-N Generated from Ruminant Urine-N, Retaining Its Bioavailability. Plant and Soil, 353, 73-84. https://doi.org/10.1007/s11104-011-1010-9
Spokas, K.A., Novak, J.M. and Venterea, R.T. (2012) Biochar’s Role as an Alternative N-Fertilizer: Ammonia Capture. Plant and Soil, 350, 35-42. https://doi.org/10.1007/s11104-011-0930-8
Zheng, H., Wang, Z., Deng, X., Zhao, J., Luo, Y., Novak, J., Herbert, S. and Xing, B. (2013) Characteristics and Nutrient Values of Biochars Produced from Giant Reed at Different Temperatures. Bioresource Technology, 130, 463-471. https://doi.org/10.1016/j.biortech.2012.12.044
Kameyama, K., Miyamoto, T., Shiono, T. and Shinogi, Y. (2012) Influence of Sugarcane Bagasse-Derived Biochar Application on Nitrate Leaching in Calcaric Dark Red Soil. Journal of Environmental Quality, 41, 1131-1137. https://doi.org/10.2134/jeq2010.0453
Ventura, M., Sorrenti, G., Panzacchi, P., George, E. and Tonon, G. (2013) Biochar Reduces Short-Term Nitrate Leaching from a Horizon in an Apple Orchard. Journal of Environmental Quality, 42, 76-82. https://doi.org/10.2134/jeq2012.0250
Haider, G., Steffens, D., Müller, C. and Kammann, C. (2017) Biochar May Physically Entrap Nitrate during Field Aging or Co-Composting Which Become Plant Available under Controlled Conditions. 19th EGU General Assembly, EGU2017, Vienna, Austria, 23-28 April 2017, Article No. 15274.
Stevenson, F.J. and Cole, M.A. (1999) Cycles of Soils: Carbon, Nitrogen, Phosphorus, Sulfur, Micronutrients. John Wiley & Sons, Hoboken.