Utilization of Humic-Loaded Fly Ash as a Slow-Release Amendment for Soil Quality Improvement
Akimbekov N.S. Digel I. Tastambek K.T. Tagayev K. Bastaubayeva S.O. Marat A.K.
December 2023Engineered Science Publisher
ES Materials and Manufacturing
2023#22
Due to the upcoming enormous global food demand and overexploitation of cultivable land resources, agriculture relies increasingly on chemical fertilizers to produce more food per unit area. However, excessive and indiscriminate agrochemical use reduces soil fertility and damages beneficial soil microbial populations. Over recent years, fly ash (FA) soil supplements derived from coal processing wastes have gained momentum in agriculture in many countries worldwide, promising sustained productivity and environmental preservation. Some prospective approaches may include modifying FA with bioavailable/bioactive molecules to enhance and regulate its benefits. One such compound is humic acid (HA), a multifunctional amorphous biopolymer that can be used to improve soil properties. In this study, we performed a modification of FA with low-rank coal-derived HA and evaluated its adsorption/desorption parameters at different pH and for different incubation times. Administration of the obtained HA-FA composite to test soil in controlled pot experiments improved its physicochemical and biological characteristics measured after 60 days of treatment. Furthermore, HA-FA amendment positively correlated with the physiological diversity of the soil microbial community and the activity of polyphenol oxidase and dehydrogenase. The results suggest that the HA-FA composite has an overall positive impact on the soil quality and may beneficially contribute to current and future sustainable soil management practices.
Fly ash , Humic acid , Low-rank coal , Soil amendment , Soil quality
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Institute of Ecological Problems, Al-Farabi Kazakh National University, Al-Farabi ave. 71, Almaty, 050040, Kazakhstan
Institute for Bioengineering, Aachen University of Applied Sciences, Heinrich-Mussmann-Straße 1, Jülich, 52428, Germany
Khoja Akhmet Yassawi International Kazakh-Turkish University, Turkistan, 161200, Kazakhstan
Department of Biotechnology, M.Auezov South Kazakhstan University, Shymkent, 160012, Kazakhstan
Department of Fundamental Medicine, Al-Farabi Kazakh National University, Almaty, 050040, Kazakhstan
Kazakh Research Institute of Agriculture and Plant Growing, Erlepesova street 1, Almalybak village, region, Almaty, 040909, Kazakhstan
Department of Biotechnology, Al-Farabi Kazakh National University, Al-Farabi ave. 71, Almaty, 050040, Kazakhstan
Institute of Ecological Problems
Institute for Bioengineering
Khoja Akhmet Yassawi International Kazakh-Turkish University
Department of Biotechnology
Department of Fundamental Medicine
Kazakh Research Institute of Agriculture and Plant Growing
Department of Biotechnology
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