Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China; State key Laboratory of Petroleum Pollution Control, CNPC Research Institute of Safety and Environmental Technology, Beijing 102206, China.
Key Laboratory of Water Cycle and Related Land Surface Process, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China.
Sci Total Environ. 2022 Jul 15;830:154730. doi: 10.1016/j.scitotenv.2022.154730. Epub 2022 Mar 23.
The construction of shale gas facilities disturbs large areas of land and affects soil quality and function. In this study, we investigated the properties (including physical, chemical, and microbiological indicators) of soil at three different distances from a shale gas development site (<30 m, 30-50 m, and 50-100 m) in a karst area in 2017 and 2020. Our results showed that the soil water content; available carbon, nitrogen, and phosphorus concentrations; total nitrogen and total phosphorus concentrations; microbial biomass, and enzyme activities increased (P < 0.05) as the distance from the well pad increased, and the total carbon content, pH, electrical conductivity, and some ions (magnesium, sodium, and potassium) decreased with distance from the well pad (P < 0.05). The differences in the soil properties were most noticeable in 2017. The increases in the available nutrients were greater than in the total nutrients. The overall soil quality after the shale gas well pad construction was limited by the microbial biomass and sodium contents. The soil properties recovered most quickly at 30-50 m from the well pad, because of local farmland management practices that improved the soil properties and microbial biomass, and reduced the microbial stress. Therefore, we recommend planting sodium-tolerant crops on the land closest to the well pads, to facilitate restoration of the soil that was disturbed during the construction period.
页岩气设施的建设会破坏大片土地，并影响土壤质量和功能。在这项研究中，我们于 2017 年和 2020 年调查了喀斯特地区距页岩气开发场地不同距离(<30 m、30-50 m 和 50-100 m)处的土壤特性(包括物理、化学和微生物指标)。结果表明，随着距井场距离的增加，土壤水分含量、有效碳、氮和磷浓度、总氮和总磷浓度、微生物生物量和酶活性增加(P < 0.05)，而总碳含量、pH 值、电导率和一些离子(镁、钠和钾)则随距井场距离的增加而降低(P < 0.05)。2017 年土壤性质的差异最为显著。有效养分的增加大于总养分的增加。页岩气井场建设后，土壤质量主要受微生物生物量和钠离子含量的限制。由于当地农田管理措施改善了土壤性质和微生物生物量，降低了微生物的应激反应，因此距井场 30-50 m 处的土壤性质恢复最快。因此，我们建议在距离井场最近的土地上种植耐钠作物，以促进施工期间受干扰土壤的恢复。
