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以黄淮海平原高产农田4年的定位试验为基础,研究施用生物质炭和猪场沼液对潮土水力特征参数及持水特性的影响。结果表明:生物炭和猪场沼液处理在不同程度上改善土壤容重和总孔隙度状况,提高土壤的持水性能,二者田间持水量分别比对照提高15.34%和13.83%,有效水含量分别提高16.20%和25.87%。对于土壤pH和饱和导水率的影响,二者表现不一,生物质炭处理使土壤pH略有升高,饱和导水率下降;沼液处理使pH下降,使饱和导水率增加。
Based on the four-year experiment of high-yielding farmland in the Huang-Huai-Hai Plain, the effects of biochar and piggery biogas slurry on the hydraulic parameters and water-holding characteristics of the tidal soil were studied. The results showed that biochar and piggery biogas slurry could improve soil bulk density and total porosity to some extent and increase soil water holding capacity. The field water holding capacity of biochar and pig farm increased by 15.34% and 13.83% respectively compared with the control, and the effective water content Increase by 16.20% and 25.87% respectively. The effects of soil pH and saturated hydraulic conductivity were different. The treatment of biomass charcoal slightly increased the soil pH and the saturated hydraulic conductivity decreased. The treatment of biogas slurry decreased the pH and increased the saturated hydraulic conductivity.