Pyrolysis temperature had effects on the physicochemical properties of biochar

Abstract

Crop straw is an important biomass resource in the agricultural production system, with an annual production of nearly 2 billion tons worldwide (Reddy et al. 2003). Corn straw is one of the three major crop straws (Bi et al. 2009). Crop straw is one of the most abundant renewable resources. At present, corn straw is mainly used in organic amendment, household fuels, and livestock feed. The proportion of burning straw on site is large, which leads to atmospheric pollution (Zhang et al. 2016). Another potential use of crop straw is to convert it into biochar, which can be used as a soil amendment to improve the net photosynthesis and dry matter accumulation rate of crops, as well as fertiliser utilisation efficiency (He et al. 2020, Das and Ghosh 2022. Biochar can be made from a variety of organic materials, including agricultural (corn straw, rice straw, and wheat straw) and forestry waste (shrubs, willow leaves) (Sohi et al.