华南农业大学学报2025，Vol.46Issue(4)：499-508,10.DOI:10.7671/j.issn.1001-411X.202408032
生物炭和铁改性生物炭对赤红壤酸缓冲性和有机碳组分的影响
Effects of biochar and Fe-modified biochar on acid buffering capacity and organic carbon fractions of lateritic red soil
摘要
Abstract
[Objective]Lateritic 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.[Method]This 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,and dissolved organic carbon content,the effects of biochar addition on soil acid buffering capacity and organic carbon components were analyzed.[Result]Relative to the control group,the addition of Fe-modified biochar prepared at 600℃significantly increased soil pH by 14.76%and total organic carbon content by 160.59%,while that at 450℃resulted in an increase in acid buffering capacity of 11.75%.Biochar preparation temperature and Fe-modification treatments enhanced the organic carbon contents of soil aggregates with different particle sizes in different degrees,with the greatest increase of 178.88%observed in the 0.054-0.250 mm soil aggregate.Fe-modification tended to reduce amines,hydrophobic carbon,aromatic organic matter contents,and the degree of aromaticity of soil dissolved organic carbon.[Conclusion]Biochar addition can significantly improve lateritic soil acid buffering and carbon sequestration capacity.However,these improvement effects are influenced by biochar preparation temperature and modification treatment.关键词
赤红壤/酸缓冲性/生物炭/土壤修复/土壤有机碳Key words
Lateritic red soil/Acid buffering capacity/Biochar/Soil remediation/Soil organic carbon分类
农业科技引用本文复制引用
胡凯杰,于成龙,陈嘉怡,陈舒芳,刘与进,危晖..生物炭和铁改性生物炭对赤红壤酸缓冲性和有机碳组分的影响[J].华南农业大学学报,2025,46(4):499-508,10.基金项目
国家自然科学基金(32071641,32471711) （32071641,32471711）
广东省自然科学基金(2024A1515010787) （2024A1515010787）
华南农业大学大学生创新创业训练计划(S202310564171) （S202310564171）
