Progress on Biochar Preparation and Its Assessement Methods of Stability

• Main Authors: JIN Liang, WEI Dan, LI Yu-mei, GUO Wen-yi, XU Meng, ZHANG Lei, LI Yi-dan, CHANG Ben-chao
• Format: Article
• Language: zho
• Published: Agro-Environmental Protection Institute, Ministry of Agriculture 2015-10-01
• Series: Journal of Agricultural Resources and Environment
• Subjects: biochar; stability; melioration; quantitative evaluation; climate change
• Online Access: http://www.aed.org.cn/nyzyyhjxb/html/2015/5/20150501.htm

As a promising pyrolysis product for mitigating climate changes, biochar can be remained in soil for thousands years after field application. The positive benefits of biochar amendment into soil include crop yield increase, soil fertility improvement and water-holding capacity enhancement. The objective of this study is to quantify specific stability of the biochar by screening the relative documents towards directions including feedstock classification, biochar preparation, unique stability, etc. Finally three types of methods were summarized, such as indirect measurement methods, direct measurement methods and molecule properties methods for biochar stability, which resulted from various production conditions and feedstocks. Wide range of biochar feedstocks and specific stability of biochar preparation required new evaluation mechanism in order to evaluate prospect of biochar production process and relative soil amelioration and limitation with multiple perspectives.