Abstract: [Objective] To study the effect of biomass carbon input on soil moisture vertical movement in chloride-sulfate saliferous gray desert soil.[Method]The study materials were gray desert soil in three salinization levels which level 1 was low salinization,level 2 was medium salinization and level 3 was high salinization.Under different percentages of biochar inputs before and through the dropwise add of ddH2O,the time-varying of wetting front and accumulative infiltration capacity were calculated and analyzed.[Result]The vertical migration distance and the cumulative infiltration rate of wetting front were significantly increased(P < 0.05)with the infiltration time of different biomass carbon inputs in each degree of saline soil.The soil moisture movement in level 2 and level 3 saliferous soil were hindered by the biomass carbon;when the input percentage of biomass carbon was less than 4;to level 1 saliferous soil,the soil moisture movement could be facilitated by the biomass carbon;The relationship of biomass carbon input percentage with accumulative infiltration capacity in these three salinization soil were negatively correlated;there was no found in the relationship of biomass carbon inputs percentage with the accumulative infiltration capacity of vertical depth of wetting front in different salinization soil.[Conclusion]The ratio of biomass carbon input,the degree of salinization and the interaction effect of the two have a significant impact on the infiltration efficiency and cumulative infiltration of soil water.The infiltration rate and infiltration amount to moderately saline soil were prominent.Low level input has a promoting effect on water transport in mildly saline soil and inhibitory effect on both cumulative infiltration rate and infiltration rate in severe saline soil.

摘要： [目的]研究生物质炭输入对氯化物-硫酸盐盐化灰漠土水分垂直运移的影响.[方法]轻、中、重盐渍化土壤输入不同量生物质炭,以不添加生物质炭为对照,通过滴加去离子水,观测湿润锋和累计入渗量随入渗时间的变化.[结果]各程度盐渍化土壤不同生物质炭输入量处理,湿润锋垂直运移距离和累计入渗量随入渗时间的持续均显著增大(P﹤0.05);生物质炭输入阻碍水分在中、重度氯化物-硫酸盐盐化灰漠土入渗,低生物质炭输入量(≤4;)促进水分在轻度盐渍化土壤垂直运移;轻、中度盐化灰漠土输入大量(≥6;)生物质炭可增加累计入渗量,重度盐化土壤累计入渗量随生物质输入量增加而降低;不同生物质炭输入量处理间垂直湿润锋深度的累积入渗量变化无规律.[结论]生物质炭输入比例、盐渍化程度及两者的交互效应对土壤水分的入渗效率和累计入渗量均有显著影响:对中度盐渍化土壤入渗速率和入渗量促进作用突出;低量输入对轻度盐渍化土壤水分运移有促进作用;对重度盐渍化土壤累计入渗量和入渗速率均有抑制作用.