Effects of biochar and Fe-modified biochar on acid buffering capacity and organic carbon fractions of lateritic red soil

• Published in: Hua nan nong ye da xue xue bao Vol. 46; no. 4; pp. 499 - 508
• Main Authors: Kaijie HU, Chenglong YU, Jiayi CHEN, Shufang CHEN, Yujin LIU, Hui WEI
• Format: Journal Article
• Language: Chinese
• Published: South China Agricultural University 01.07.2025
• Subjects: acid buffering capacity; biochar; lateritic red soil; soil organic carbon; soil remediation
• ISSN: 1001-411X
• DOI: 10.7671/j.issn.1001-411X.202408032

ObjectiveLateritic red soil is a kind of acidic soil that covers a considerable proportion of the land in south China. Continuous soil acidification affects its physical and chemical property as well as biological characteristic, which is adverse to the maintenance of soil function as well as the accumulation and storage of soil organic carbon. Biochar addition could remedy the acidified soils effectively. This study was aimed to explore the impacts of biochar and Fe-modified biochar on the acid buffering capacity and organic carbon fractions of lateritic red soil, in order to provide a scientific basis for acid soil improvement as well as soil carbon sequestration and enhancement. MethodThis study focused on lateritic red soil as the research subject, with the addition of rice straw biochar and Fe-modified rice straw biochar prepared at different temperatures (300, 450, and 600 ℃). By measuring indicators such as soil pH, acid buffering capacity, total organic carbon content, aggregate organic carbon content