Potential of biochar for soil improving and carbon sequestration

Abstract

As a carbon sink, biochar (BC) has been considered a crucial tool in the fight against climate change and the greenhouse effect. Accordingly, this study used bibliometric analysis to investigate into the BC development trend for soil carbon sequestration and mitigation from 2001 to 2020. The two most influential writers, according to the findings, are Johannes Lehmann and Yong Sik Ok. Although Germany, the United States, and China are the most often collaborating nations, the latter two have a greater influence on scientific knowledge than the former. Cornell University and Kangwon National University rank first and second, respectively, in terms of influence and the number of publications, after the Chinese Academy of Sciences. First, there is pyrolysis, nutrients, and microbes; second, heavy metal immobilization; third, soil characteristics and agricultural output; fourth, greenhouse gas, meta-analysis, and experimental field work; and fifth, carbon fraction and sequestration. Six out of the ten most-cited publications are reviews, and eight of those studies center on the early years of BC research, which laid the groundwork for the field's growth. While both the overall number of publications and citations are greatest in Science of the overall Environment, there is a slight bias toward citing work from Soil Biology and Biochemistry. Future study should focus on the following areas: (1) How biochar interacts with soil and the microbes that live in it. (2) Developing optimization strategies to enhance BC that are cost-effective, yield-oriented, and have a significant impact. Three, the effects of BC on ecosystems and human health as measured in long-term localization studies. (4) More extensive worldwide evaluations of BC's carbon sinks are required.