National Research Institute for Rural Engineering, Water and Forestry (INRGREF), University of Carthage, 10 street Hédi Karray, Manzeh IV, 2080, Ariana, Tunisia.
Faculty of Sciences of Tunis, University of Tunis El Manar, 2092, El Manar Tunis, Tunisia.
Environ Sci Pollut Res Int. 2019 Oct;26(28):28829-28841. doi: 10.1007/s11356-019-06086-x. Epub 2019 Aug 3.
Irrigation with treated waste water (TWW) in combination with plantation of agroforest species was tested in the Kalaât Landelous region for the reclamation of salt affected soils. Five species (Atriplex nummularia, Eucalyptus gomphocephala, Acacia cyanophylla, Casuarina glauca, Pinus halepensis) were cultivated in saline soils that are affected by shallow, saline groundwater and were irrigated with TWW during the summer season. The results after 4 years of experimentation show a distinct decrease in soil pH and salinity accompanied by a decrease in Cl and Na concentrations. Irrigation decreased the heavy metal concentrations in the topsoil but an increase in deeper layers indicate to leaching due to TWW irrigation. The investigated plant species were differently affected in growth performance by salinity and TWW irrigation. Atriplex nummularia appeared to be the most resistant species and Pinus halepensis the most sensitive one to hydro-pedological conditions of the Kalaât Landelous plot. In conclusion, salt-tolerant plant species seem to be good candidates for the reclamation of salt-affected, waterlogged sites in combination with TWW irrigation, as the adaptations of such species seem to operate under different abiotic stress conditions.
在 Kalaât Landelous 地区，用处理后的废水（TWW）进行灌溉，并种植农林物种，用于受盐影响土壤的开垦。在受浅层盐水地下水影响的盐渍土壤中，种植了 5 种物种（盐角草、蓝桉、银荆、木麻黄、油松），并在夏季用 TWW 进行灌溉。经过 4 年的实验，结果表明土壤 pH 值和盐分明显降低，同时 Cl 和 Na 浓度降低。灌溉降低了表土中的重金属浓度，但深层浓度增加表明由于 TWW 灌溉导致淋溶。受盐分和 TWW 灌溉影响，研究的植物物种在生长性能上表现出不同的差异。盐角草似乎是最具抗性的物种，而油松对 Kalaât Landelous 试验区的水文地质条件最敏感。总之，耐盐植物物种似乎是结合 TWW 灌溉开垦盐渍、积水地的良好候选者，因为这些物种的适应似乎在不同的非生物胁迫条件下起作用。
