水土保持学报2025，Vol.39Issue(4)：295-303,9.DOI:10.13870/j.cnki.stbcxb.2025.04.037
水炭运筹对黄河三角洲钠质盐土降盐效果
Effects of Water and Biochar Management on Salt Reduction Effect in Sodic Saline Soil of the Yellow River Delta
摘要
Abstract
[Objective]To clarify the effects of biochar application rate and irrigation volume on the salt reduction in sodic saline soil of the Yellow River Delta and to identify the optimal ratio between the two.[Methods]A two-factor five-level orthogonal rotation combination design was employed in soil column experiments to simulate the effects of irrigation volume(1.00,1.07,1.25,1.43 and 1.50 times the saturated soil moisture content,θs)and biochar application rates(1.00%,1.59%,3.00%,4.41%and 5.00%of soil mass in the 0～20 cm layer,Sw)on soil volumetric moisture content,electrical conductivity,pH,and ion mass fraction in sodic saline soil.The optimal water-biochar combination ratio was determined using the analytic hierarchy process and multiple regression equations.[Results]1)The treatment with 4.41%Sw and 1.43 θs achieved the highest soil volumetric moisture content(31.71%)and pH(8.50).In contrast,the treatment with 3.00%Sw and 1.25 θs showed the most significant reductions(p<0.05)in electrical conductivity,Na⁺ mass fraction,and sodium adsorption ratio(SAR)compared to the untreated soil,with decreases of 82.05%,89.71%and 86.43%,respectively.2)Both water and biochar synergistically affected the comprehensive evaluation index of salt reduction effect in sodic saline soil,with irrigation having greater influence than biochar application.The comprehensive evaluation index initially increased but subsequently decreased with the increasing application rates of both factors.The maximum evaluation index(0.72)for salt reduction in sodic saline soil was obtained at an irrigation level of 1.37 θs combined with a biochar application rate of 3.45%Sw.[Conclusion]To enhance sodic saline soil quality in the Yellow River Delta,the synergistic combination of 3.45%Sw biochar application and 1.37 θs irrigation is the most effective strategy for salt reduction in saline-alkali soil.The research results provide a theoretical basis for saline-alkali soil remediation.关键词
钠质盐土/生物炭/土柱模拟/盐分淋洗Key words
sodic saline soil/biochar/soil column simulation/salt leaching分类
农业科技引用本文复制引用
王效涵,孙池涛,许加一,朱海,张俊鹏,冯国艺,傅建国,鲍建平,申洪亮..水炭运筹对黄河三角洲钠质盐土降盐效果[J].水土保持学报,2025,39(4):295-303,9.基金项目
国家重点研发计划项目(2023YFD1902600) （2023YFD1902600）
国家自然科学基金项目(52109059) （52109059）
山东省教育厅青创团队项目(2023KJ162) （2023KJ162）
山东省重点研发计划项目(2024SFGC0403) （2024SFGC0403）
国家棉花产业技术体系项目(CARS-15-18) （CARS-15-18）
