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为探明水-沼液一体灌溉模式对作物根区土壤水分环境的影响,通过水平和垂直土柱入渗试验,探求不同沼液浓度、土壤容重和入渗水头对入渗特征的影响.结果表明:在相同时间内,土壤容重为1.40 g/cm3处理的累积入渗量均小于1.35 g/cm-3处理,但所有处理的累积入渗量均随沼液浓度的增大而减小;垂直土柱入渗试验中4 cm水头单位时间累积入渗量及土壤剖面含水率均高于2 cm水头处理;不同处理土壤水扩散率及各剖面土壤含水率均呈现CK＞1∶4＞1∶2＞1∶1＞BL.通过对数据进行拟合分析,发现指数函数能较好地描述不同土壤容重和沼液浓度的土壤水扩散率;Kostiakov入渗模型能够准确描述垂直入渗试验中不同沼液浓度、土壤容重和入渗水头对累积入渗量的影响,其入渗系数随沼液浓度的增大逐渐减小,而入渗指数则随沼液浓度的增大逐渐增大.“,”To explore the effect of water-biogas slurry integrated irrigation mode on soil moisture environment of crop root zone,the biogas slurry was integrated with water and the influence of such factors as biogas slurry concentration,soil bulk density,and infiltration head was found by means of experiment on both horizontal and vertical soil columns.Results showed that the cumulative infiltration of all treatments with soil bulk density of 1.40 g/cm-3 are lower than that of 1.35 g/cm-3 at the same infiltration time,and the cumulative infiltration decreases with the increase of biogas slurry concentration both in horizontal and vertical infiltration.For the vertical soil column infiltration,the cumulative infiltration during unit time and the water content on various cross-sections of treatments with 4 cm infiltration head would be higher than that of 2 cm infiltration head treatments.Meanwhile,the water diffusion and water content on various cross-section of differently treated soils are present the trends of CK＞1 ∶ 4＞1.2＞1 ∶ 1＞BL at the same soil bulk density,where CK and BL are the pure water original biogas slurry treatment,respectively.The results of fitting analytical showed that the exponential function could be used to describe the soil water diffusion with different biogas slurry concentrations and soil bulk densities,and the Kostiakov infiltration model could be used to describe accurately the influence of biogas slurry concentrations,roil bulk density,and infiltration head of vertical soil in its infiltration test on the cumulative infiltration;its infiltration coefficient would gradually decrease with the increase of biogas slurry concentration,while the infiltration index would gradually increase with that.