Hydrochar-based soil amendments for agriculture: a review of recent progress
Category:- Journal; Year:- 2021
Discipline:- Forestry & Wood Technology Discipline
School:- Life Science School
Hydrochar is a carbon-rich material produced by the hydrothermal carbonization (HTC) of biomass. As a new concept, hydrochar has generated much research interest due to its ability to employ wet and dry biomass as feedstocks and its application in the agronomical, environmental, and energy sectors. This review considers the developments made with hydrochar as a soil amendment in terms of soil fertility, carbon sequestration, and fate of pollutants based on the available data. Moreover, the economic feasibility using a life cycle assessment of hydrochar has also been discussed. This review assessed that the hydrochar is an environmentally friendly soil amendments for plant growth by slow release of nutrients and carbon sequestration. Hydrochar application to the soil may increase the soil’s water-holding capacity but decreases the bulk density, although the water-holding capacity of hydrochar depends on the reaction temperature and particle size of the materials. Furthermore, the hydrochar may exert a positive effect on growth and abundance of different soil microbes. This paper not only summarizes the recent advances made in developing hydrochar as a soil amendment, it also discusses the challenges and limitations of hydrochar in a wider context.