土壤2025，Vol.57Issue(3)：558-567,10.DOI:10.13758/j.cnki.tr.2025.03.009
生物质炭和生物硝化抑制剂对石灰性紫色土氮转化过程的影响
Effects of Biochar and Bionitrification Inhibitors on Nitrogen Transformation in Calcareous Purple Soil
摘要
Abstract
The study investigated the impacts of biochar(BC)and biological nitrification inhibitors(BNIs),such as methyl 3-(4-hydroxyphenyl)propionate(MHPP),on soil nitrogen transformation in calcareous purple soil,which included both aerobic 15N labeling experiment and anaerobic acetylene(C2H2)inhibition experiment to examine the effects of different BC applied rates(10 g/kg and 50 g/kg)and/or MHPP on gross nitrogen transformation rates,including mineralization rate,nitrification rate,denitrification rate,and NH4+immobilization rate.The results showed that,compared to the control group,mineralization rates increased by 26.63%-60.06%under 1%BC(10 g/kg),5%BC(50 g/kg),and 5%BC+MHPP treatments.Biochar applied alone(1%BC and 5%BC)had no inhibitory effect on nitrification rate,while the combined treatments of 1%BC+MHPP and 5%BC+MHPP significantly reduced nitrification rates by 50.34%and 61.56%,respectively(P<0.05).NH4+immobilization rates increased significantly 95.88%-217.53%(P<0.05)under all treatments with BC,with the highest increase observed under 5%BC treatment.Additionally,biochar showed the potential to stimulate the denitrification process.The lowest ratios of nitrification rate to mineralization rate and nitrification rate to NH4+immobilization rate were observed under 5%BC+MHPP treatment.These findings suggest that the combined application of 5%BC and MHPP may be an effective strategy to reduce nitrogen loss in calcareous purple soil and enhance crop nitrogen utilization efficiency,but further field validation is warranted to confirm the effectiveness of this approach.关键词
生物质炭/生物硝化抑制剂/土壤氮素转化/15N标记/反硝化速率Key words
Biochar/Biological nitrification inhibitors/Soil nitrogen transformation/15N labeling/Denitrification rate分类
农业科技引用本文复制引用
李梦潇,李纹旭,刘汐霓,张成,曾卓,兰婷..生物质炭和生物硝化抑制剂对石灰性紫色土氮转化过程的影响[J].土壤,2025,57(3):558-567,10.基金项目
国家"十四五"重点研发计划项目(2022YFD1901400)资助. （2022YFD1901400）
