灌溉排水学报2026，Vol.45Issue(7)：101-113,13.DOI:10.13522/j.cnki.ggps.2025326
沼液沼渣协同作用对土壤水分入渗、蒸发及有机质量影响的试验研究
Synergistic effects of biogas slurry and biogas residue applications on soil water movement,thermal regime and organic matter content
摘要
Abstract
[Objective]Biogas slurry and residue are rich in nutrients,and their combined application can improve soil quality.This study experimentally investigates the synergistic effect of biogas slurry and biogas residue on soil water movement and soil organic matter.[Method]The laboratory infiltration experiment included four biogas residue application rates(mass of biogas residue/mass of soil):0%(S0),1%(S1),2%(S2)and 4%(S4),and three biogas slurry concentration treatments(volumetric ratio of biogas slurry to water):0(W0),1∶8(W1:8)and 1∶4(W1:4).For each treatment,we measured soil water-holding capacity,wetting front advancement,cumulative infiltration,cumulative evaporation,diurnal soil temperature variation,and soil organic matter content.Temporal variations in wetting front migration distance,cumulative infiltration,and cumulative evaporation were fitted to the power function,Kostiakov model and Rose model,respectively.[Result]①Soil water-holding capacity increased with increasing biogas residue application rate and biogas slurry concentration.The volumetric soil water content under S4W1:4 was 15.84%higher than that under S0W0.The water retention curves of all treatments were well fitted by the van-Genuchten model,with a coefficient of determination(R2)≥0.998 5.②Increasing biogas residue application and biogas slurry concentration remarkably reduced water infiltration.When irrigation was 120 mm,the S4W1:4 treatment prolonged the infiltration duration by 106.49%compared with S0W0.The relationship between wetting front distance and infiltration time can be described by a power-law function(R2≥0.993 2,RRMSE≤0.055 0,NS≥0.993 4).The Kostiakov model well described the temporal change in cumulative infiltration(R2≥0.994 7,RRMSE≤0.059 5,NS≥0.992 5).③With the increase in biogas residue application rate,soil evaporation first increased and then decreased;increasing biogas slurry concentrations reduced soil evaporation.The cumulative evaporation in the S4W1:4 was 32.34 mm,the lowest among all treatments.The Rose model accurately described the temporal change in cumulative evaporation(R2≥0.953 5,RRMSE≤0.048 8,NS≥0.958 7).With increasing biogas residue application,the diurnal temperature amplitude of each soil layer initially increased and then decreased.Biogas slurry irrigation effectively reduced diurnal soil temperature variation.Soil organic matter content was positively correlated with both biogas residue application rate and biogas slurry concentration.[Conclusion]The combined application of 4%biogas residue and 1∶4 biogas slurry dilution can effectively balance soil water infiltration and evaporation in silty loam soil.关键词
沼液/沼渣/土壤水分特征曲线/蒸发量/入渗量/土壤温度/有机质Key words
biogas slurry/digestate/soil moisture characteristic curve/cumulative evaporation/cumulative infiltration volume/soil temperature/organic matter分类
农业科技引用本文复制引用
郑健,范盼盼,马彪,刘海涛,王俊杰,郭亚军..沼液沼渣协同作用对土壤水分入渗、蒸发及有机质量影响的试验研究[J].灌溉排水学报,2026,45(7):101-113,13.基金项目
国家自然科学基金项目(52469011) （52469011）
自然资源部退化及未利用土地整治工程重点实验室开放基金项目(SXDJ2024-08) （SXDJ2024-08）
2025年水利科学试验研究及技术推广计划(甘水建管发[2025]24号,25GSLK079) （甘水建管发[2025]24号,25GSLK079）
