Response of Alfalfa Leaf Traits and Rhizosphere Fungal Communities to Compost Application in Saline-Sodic Soil.

Under each compost addition ratio treatment, soil pH was significantly decreased compared to the control group, while soil BGC, soil URE, and soil APC were significantly higher than those in the control group ( p < 0.05); and between different compost addition ratio treatments, soil BGC and soil URE showed a decreasing trend with an increase in compost addition rate.

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With the increase in compost addition rate, leaf Na + content (LNa + ) showed a decreasing trend and reached the lowest (3.95 mg g −1 ) under SAF25 treatment, while the leaf K + content (LK + ) showed an increasing trend, and reached the highest (49.28 mg g −1 ) under SAF25 treatment ( Table 2 ).

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