Soil salinization severely degrades agricultural land and significantly impacts agricultural productivity. Earthworm casts, as a pollution-free improver, can effectively enhance the structure and properties of soil; however, their effects on water and salt movement in soil, under brackish water irrigation, remain unclear. In this study, we conducted laboratory experiments to investigate the effects of earthworm cast treatments under four application rates (untreated, 1%, 3%, and 5% of soil weight) on water and salt movement in anthrosols (CS) and cambisols (AS) from the Loess Plateau. The application of earthworm casts was found to inhibit soil infiltration and evaporation, except for the 1% treatment in CS; inhibition also increased with more concentrated treatments. Compared to that in untreated soil, the infiltration rate and cumulative evaporation in cast-treated CS decreased by 23.9–32.2% and 5.1–9.8%, whereas in AS, they decreased by 17.6–28.5% and 8.6–20.7%. The application of earthworm casts significantly reduced the electrical conductivity of the upper 20 cm of soil, and the reduction increased with more concentrated treatments. Compared with untreated soil, the application of earthworm casts significantly reduced the sodium absorption ratio in the upper 0–20 cm by 15.6–31.1% in CS and 12.2–28.1% in AS. Applying earthworm casts significantly reduced the exchangeable sodium percentage of soil at 0–20 cm by 16.5–25.9% in CS and 13.5–22.5% in AS. Therefore, the application of earthworm casts effectively alleviated soil salinity and sodicity in both soil types by reducing the salt content in the upper 0–20 cm under brackish water irrigation.

土壤盐渍化严重破坏了农业用地，并严重影响了农业生产力。worm作为一种无公害的改良剂，可以有效地增强土壤的结构和特性。然而，在微咸水灌溉下，它们对土壤中水分和盐分运动的影响尚不清楚。在这项研究中，我们进行了实验室实验，研究了四种施肥量（未处理，土壤重量的1％，3％和5％）下cast施肥处理对人为土壤溶胶（CS）和坎比索醇（AS）中水和盐分迁移的影响）。研究发现worm的施用抑制了土壤的渗透和蒸发，除了在CS中1％的处理外。更加集中的治疗也会增加抑制作用。与未经处理的土壤相比，铸态处理过的CS的渗透率和累积蒸发分别降低了23.9–32.2％和5.1–9.8％，而在AS中，它们分别降低了17.6–28.5％和8.6–20.7％。worm铸模的应用显着降低了土壤上部20 cm的电导率，并且随着更集中的处理，降低的电导率也增加了。与未处理的土壤相比，the的施用显着降低了0-20 cm上部的钠吸收率，CS降低了15.6-31.1％，AS降低了12.2-28.1％。施用s施肥显着降低了CS上1-20-25.9％和AS上13.5-22.5％的土壤中0-20 cm的可交换钠含量。因此，the肥料的应用通过减少咸水灌溉下0-20 cm上部的盐分含量，有效地减轻了两种土壤的盐分和盐碱度。