Does Short-Term Combined Irrigation Using Brackish-Reclaimed Water Cause the Risk of Soil Secondary Salinization?

Comparing mixed irrigation and rotational irrigation using brackish water and reclaimed water ( Figure 2 c), the soil exchangeable Ca 2+ , K + , and Mg 2+ contents showed an increasing trend under rotational irrigation compared to mixed irrigation, of which the exchangeable Ca 2+ content increased significantly.

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The soil exchangeable Na + content showed a decreasing trend with the increase in the irrigation times of reclaimed water, and there was a significant difference between the rotational irrigation treatment and the pure brackish water irrigation or the reclaimed water irrigation treatment.

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