Abstract The objective of this study was to examine the influence of vermicompost (VC) as a soil conditioner in alleviating adverse effects of sodium in Na salt-effected soils. Therefore, the role of VC for reducing the adverse effects of Na salt on physicochemical properties of soil was investigated. Experiments were conducted with different doses of VC (0, 2.5 and 5% VC (w/w) and three different Na salt levels (0, 4 and 8 dS m−1 NaCl). Vermicompost treatments under different salinity stress levels had significant positive effects on soil physicochemical properties. Vermicompost also decreased exchangeable Na of salt-affected soils. Vermicompost treatments under different Na salt regimes enhanced soil organic matter, available phosphorus, total nitrogen, available K and cation exchange capacity of the soils. VC treatments under the low and medium Na salt levels (0 and 4 dS m−1 NaCl concentration, respectively) increased soil EC values. However, vermicompost treatments under high Na salt stress (8 dS m−1 NaCl concentration) decreased EC values, thus soil salinity. Vermicompost treatments under different Na salt regimes increased field capacity, available water capacity, saturated hydraulic conductivity, total porosity, aggregate stability and decreased bulk density of the soils. Present findings revealed that vermicompost treatments, especially 5% VC treatments were quite effecient in alleviating adverse effects of salinity and enhancing soil quality. It was concluded based on present findings that vermicompost treatments could be considered as an efficient amelioration material for reclamation of Na salt-effected soils.

中文翻译：

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施用蚯蚓粪减轻钠对土壤理化性质的不利影响

摘要 本研究的目的是检验蚯蚓堆肥 (VC) 作为土壤调理剂在减轻钠盐影响土壤中钠的不利影响方面的影响。因此，研究了VC在降低Na盐对土壤理化性质的不利影响方面的作用。使用不同剂量的 VC（0、2.5 和 5% VC (w/w) 和三种不同的钠盐水平（0、4 和 8 dS m-1 NaCl）进行实验。不同盐度胁迫水平下的蚯蚓粪处理具有显着正蚯蚓粪还降低了受盐影响土壤的交换性钠盐，不同钠盐处理下的蚯蚓粪处理提高了土壤有机质、速效磷、全氮、速效钾和阳离子交换能力。在低和中钠盐水平（分别为 0 和 4 dS m-1 NaCl 浓度）下的 VC 处理增加了土壤 EC 值。然而，在高钠盐胁迫（8 dS m-1 NaCl 浓度）下的蚯蚓堆肥处理降低了 EC 值，从而降低了土壤盐分。不同钠盐条件下的蚯蚓堆肥处理增加了土壤的田间持水量、有效水容量、饱和导水率、总孔隙度、团聚体稳定性和降低的土壤容重。目前的研究结果表明，蚯蚓粪处理，特别是 5% VC 处理在减轻盐分的不利影响和提高土壤质量方面非常有效。根据目前的研究结果得出的结论是，蚯蚓堆肥处理可被视为一种有效的改良材料，用于开垦钠盐影响的土壤。