As soil depth increased, the contents of all four cations exhibited a decreasing trend under the non-irrigation treatment.
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Brackish water irrigation boosts honeysuckle (<i>Lonicera japonica</i> Thunb.)-salt tolerance by regulating sodium partitioning and potassium homeostasis: implications for coastal saline soil.
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The variation in Ca 2+ content was more dynamic: overall, it displayed an increasing trend across treatments in 2019, while in 2020, it increased under the T4 treatment but decreased under T2 and T3 treatments.
Treatment, year, and their interaction all exerted highly significant effects on surface soil ion concentrations ( Supplementary Table S1 ).