This study investigated, soil salinity and moisture content under the exotic Tamarix in the Olifants River, South Africa, where they predominantly occur. Soil electro-conductivity (EC) was mapped using the electromagnetic induction (EMI) device (EM38 sensor), in three transects laid along the river from as close to the water source outward towards the bank of the River at 50 m apart. This was supported by three soil EC and moisture measurements from each of the three transects at a soil depth of 0–100 cm at intervals of 10 cm using soil EC meter and Amplitude Domain Reflectometry (ADR) sensor, respectively. The highest salt concertation (3,000 mS/m or 19,500 ppm) was found at a depth of 30–40 cm under the dense Tamarix species. The highest soil moisture (20–40%) was also found at the same depth under the Tamarix, suggesting a hydraulic lift of water to the top 30–40 cm, where the Tamarix fine roots for water absorption occur. It also confirms that the distance from water point and Tamarix plant density affect salt leaching depth and amount of litter decomposition, respectively, which is the main source of salt deposition in soil.

这项研究调查了南非奥利芬特河（Olifants River）外来的塔马柳（Tamarix）的土壤盐分和水分含量，这些盐和水分主要发生在该地区。使用电磁感应（EMI）装置（EM38传感器）将土壤电导率（EC）绘制在沿河流放置的三个样条中，这些样条从靠近水源的地方向外以50 m的距离朝向河岸。这通过分别使用土壤EC计和幅域反射计（ADR）传感器在0–100 cm的土壤深度以10 cm的间隔从三个样带中的每一个进行的三个土壤EC和水分测量得到支持。在密集的Ta柳属物种下，在30–40 cm的深度发现了最高的盐协同作用（3,000 mS / m或19,500 ppm）。在Ta柳下，同样深度的土壤水分最高（20-40％），建议用液压将水提升到30至40厘米的顶部，那里会出现Tamarix细根吸水。这也证实距水点的距离和and柳植物密度分别影响盐分浸出深度和凋落物分解量，这是土壤中盐分沉积的主要来源。