Effects of Different Soil Amendment Combinations on the Eggplant Yield, Heavy Metal Content and Soil Agrochemical Characters

In order to provide the basis for the management and safe utilization of the acidic soil, seven different treatments were set up, including the formula fertilizer T1 (CK), formula fertilizer + soil amendment (lime powder T2, agricultural-use magnesium hydroxide T3, terbegai soil conditioner T4), organic fertilizer + soil amendment (lime powder T5, agricultural-use magnesium hydroxide T6, terbegai soil conditioner T7). Then, the effects of different soil amendment combinations on the yield of eggplant, heavy metal content and soil agrochemical characters were compared. The results showed that compared with the single application of formula fertilizer (CK), the application of the combinations, such as the organic fertilizer + soil amendment and formula fertilizer + soil amendment in the acidic soil could significantly increase the crop yield, reduce the heavy metal content of eggplant and improve the agrochemical characters of soil. In terms of increasing the eggplant yield and reducing the chromium content of eggplant, the combination of organic fertilizer + soil amendment had a better effect than the combination of formula fertilizer + soil amendment. In terms of reducing the Cd content of eggplant, the combination of formula fertilizer + soil amendment had a better effect. In terms of the effect of improving the soil agrochemical traits, the influences of the two were not obvious.