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OA
Effects of biochar application rate and frequency on soil organic carbon and plant-derived residue carbon in farmland of Yellow River Delta
[目的]植物源残体碳是土壤有机碳(SOC)的核心组分,其转化过程直接决定农田碳库稳定性.生物炭被广泛用于提升土壤固碳能力,但其对植物源残体碳的调控机制尚未明晰.[方法]本研究以黄河三角洲农田为对象,设置 10个不同施用剂量(0、4、8和 12 t/hm2)和频次(每年、每隔 1年和仅一次性施用)的生物炭处理,分析其对 SOC、木质素酚及其降解的影响.[结果]1)与对照处理相比,所有生物炭处理均显著提升 SOC 质量分数,增幅达 15.2%～52.2%,但大多数处理并未通过促进植物源残体碳转化来提升 SOC;2)生物炭对木质素酚的调控存在严格剂量-频次特异性,仅每年施用 8 t/hm2 和每隔 1年施用 4 t/hm2 处理显著提高木质素酚总量,增幅分别达 30.2%和 36.6%;而每隔 1年施用 12 t/hm2 生物炭和仅一次性施用生物炭处理组均显著提高香草基酚类单体和丁香基酚类单体酸醛比,表明其加剧木质素酚降解,降低植物源残体碳留存.[结论]生物炭可通过施用剂量与频次的耦合效应调控黄河三角洲农田土壤植物源残体碳转化与固持;综合环境与经济效益,每隔1年施用 4 t/hm2 生物炭能有效维持木质素酚降解-积累平衡,提升 SOC 稳定性,研究结果可为区域农田碳固存及生物炭施用策略优化提供理论支撑.
[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.
张卫红;王娜娜;王艳君;卢书华;刘宏元
河北省气象科学研究所/河北省气象与生态环境重点实验室,050021,石家庄||饶阳国家气候观象台,053900,河北衡水山东省农业科学院/养分资源高效利用全国重点实验室,250100,济南||国家盐碱地综合利用技术创新中心,257347,山东东营||山东省农业科学院黄河三角洲现代农业研究院,257300,山东东营山东省农业科学院/养分资源高效利用全国重点实验室,250100,济南||国家盐碱地综合利用技术创新中心,257347,山东东营||山东省农业科学院黄河三角洲现代农业研究院,257300,山东东营山东农业大学生命科学学院,271018,山东泰安山东省农业科学院/养分资源高效利用全国重点实验室,250100,济南||国家盐碱地综合利用技术创新中心,257347,山东东营||山东省农业科学院黄河三角洲现代农业研究院,257300,山东东营
农业科技
生物炭木质素酚剂量和频次植物源残体碳有机碳
biocharlignin phenolsapplication rate and frequencyplant-derived residue carbonorganic carbon
《中国水土保持科学》 2026 (4)
242-252,11
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)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)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)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)
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