The practice of “cyanobacterization” (soil inoculation with cyanobacteria) has been shown to be effective in increasing soil fertility and physical stability in natural and agricultural soils, but little is known about its utility for the recovery of burned soils. To partly fill this knowledge gap, we inoculated two cyanobacterial species, Phormidium ambiguum and Scytonema javanicum, in two burned sterilized soils having contrasting properties, and incubated them under laboratory conditions for 45 days. The development of a cyanobacterial biocrust induced by the inoculum was evident and confirmed by the significant increase in chlorophyll a content compared to control soils. Hydrophobicity, surface penetration resistance, and exopolysaccharide content of the two soils were also evaluated. Cyanobacteria inoculation significantly decreased soil hydrophobicity, as assessed by the lower repellency index 15 days after the inoculation compared to the control soils. A significant increase in penetration resistance was recorded in the inoculated samples compared to control ones after 45 days of soil incubation. The effect of cyanobacteria inoculation depended on the characteristics of the burned soil, being more marked in the soil finer in texture, richer in organic carbon and nitrogen, and with lower initial soil hydrophobicity. In conclusion, this study points to the potential of cyanobacterization for the stabilization and recovery of soils in burned areas, which is one of the major concerns in postfire management to avoid net soil loss and major hydrogeological issues.

中文翻译：

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接种蓝细菌可作为稳定土壤燃烧的潜在工具

事实证明，“氰化细菌化”（用蓝细菌对土壤进行接种）可以有效地提高天然和农业土壤的土壤肥力和物理稳定性，但人们对其回收烧过的土壤的效用知之甚少。为了部分填补这一知识空白，我们在两种具有对比特性的烧过的灭菌土壤中接种了两种蓝细菌物种：Phomidium ambiguum和Scytonema javanicum，并在实验室条件下将其孵育了45天。叶绿素a的显着增加证实了接种物诱导的蓝细菌生物结皮的发展。含量与对照土壤相比。还评估了两种土壤的疏水性，表面抗渗透性和胞外多糖含量。接种蓝藻后，与对照土壤相比，接种后15天的驱蚊指数较低，表明土壤疏水性显着降低。在土壤培养45天后，与对照样品相比，接种样品的抗渗透性显着提高。蓝细菌接种的效果取决于烧过的土壤的特性，在土壤质地更细，有机碳和氮含量更高以及土壤初始疏水性较低的情况下更为明显。总而言之，这项研究指出了氰化细菌在燃烧地区土壤稳定和恢复方面的潜力，