黄河三角洲农田生物炭施用剂量与频次对土壤有机碳和植物源残体碳的影响
Effects of biochar application rate and frequency on soil organic carbon and plant-derived residue carbon in farmland of Yellow River Delta
摘要
Abstract
[Objective]Plant-derived residue carbon(PRC)is a core component of soil organic carbon(SOC),and its transformation process directly determines the stability of farmland carbon pools.Biochar has been widely applied to enhance soil carbon sequestration capacity,yet its regulatory mechanism for plant-derived residue carbon remains unclear.[Methods]This study was conducted in farmland of the Yellow River Delta,with ten biochar treatments established using different application rates(0,4,8,and 12 t/hm2)and frequencies(annual,biennial,one-time application)to analyze their effects on SOC,lignin phenols,and lignin phenol degradation.[Results]All biochar treatments significantly increased SOC content by 15.2%to 52.2%,compared to the control.However,the SOC increase in most treatments was not attributable to the promotion of PRC transformation.The regulation of lignin phenols by biochar exhibited strict application rate-frequency specificity.Only annual application of 8 t/ha and biennial application of 4 t/hm2 significantly increased total lignin phenol content by 30.2%and 36.6%,respectively.In contrast,the biennial application of 12 t/hm2 biochar and one-time biochar application treatments significantly increased the acid/aldehyde ratios of vanillyl phenol and syringyl phenol monomers,indicating accelerated lignin phenol degradation and reduced PRC retention.[Conclusions]Biochar regulates the transformation and retention of PRC in farmland soils of the Yellow River Delta through the coupled effects of application rate and frequency.Considering environmental and economic benefits,biennial application of 4 t/hm2 biochar effectively maintains the balance between degradation and accumulation of lignin phenols and enhances SOC stability.The findings provide a theoretical basis for regional farmland carbon sequestration and optimizing biochar application strategies.关键词
生物炭/木质素酚/剂量和频次/植物源残体碳/有机碳Key words
biochar/lignin phenols/application rate and frequency/plant-derived residue carbon/organic carbon分类
农业科技引用本文复制引用
张卫红,王娜娜,王艳君,卢书华,刘宏元..黄河三角洲农田生物炭施用剂量与频次对土壤有机碳和植物源残体碳的影响[J].中国水土保持科学,2026,24(4):242-252,11.基金项目
山东省农业科学院农业科技创新工程"湿地所基础研究任务"(CXGC2025C14),"粮食主产区农田碳汇精准核算与减排固碳关键技术研发"(CXGC2025B19),"湿地农业与生态技术研究"(CXGC2023F14) （CXGC2025C14）
山东乡村振兴实践研究院 2025 年度乡村振兴研究课题"新质生产力引领山东农业绿色低碳高质量发展理论与路径研究"(SDXCZX202511-01) （SDXCZX202511-01）
国家盐碱地综合利用技术创新中心"揭榜挂帅"项目"盐碱地不同改良利用模式碳收支评估"(GYJ2023003) （GYJ2023003）
东营市科技创新重大专项"盐碱地生物炭改良利用模式与碳收支评估"(2024ZDJH66) The Science and Technology Innovation Project of Shandong Academy of Agricultural Sciences"Research Tasks on Wetland Foundation"(CXGC2025C14),"Precise Accounting of Carbon Sinks in Farmland in Major Grain-producing Areas and Development of Key Technologies for Reducing Emissions and Sequestering Carbon"(CXGC2025B19),"Research on Wetland Agriculture and Ecological Technologies"(CXGC2023F14).The 2025 Annual Rural Revitalization Research Project of the Shandong Rural Revitalization Practice Institute"Research on the Theory and Pathways of New Quality Production Leading the Green,Low-carbon and High-quality Development of Agriculture in Shandong"(SDXCZX202511-01).National Technological Innovation Center for Comprehensive Utilization of Saline-Alkali Land"Open List"Project"Carbon Budget Assessment of Different Improved Utilization Modes of Saline-alkali Land"(GYJ2023003).Dongying City Science and Technology Innovation Major Project"Saline-alkali Land Biochar Improved Utilization Model and Carbon Budget Assessment"(2024ZDJH66) （2024ZDJH66）
